/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-bf4350c [2020-09-17 02:35:12,839 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-17 02:35:12,846 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-17 02:35:12,892 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-17 02:35:12,893 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-17 02:35:12,900 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-17 02:35:12,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-17 02:35:12,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-17 02:35:12,910 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-17 02:35:12,911 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-17 02:35:12,913 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-17 02:35:12,914 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-17 02:35:12,914 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-17 02:35:12,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-17 02:35:12,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-17 02:35:12,917 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-17 02:35:12,918 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-17 02:35:12,919 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-17 02:35:12,921 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-17 02:35:12,923 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-17 02:35:12,925 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-17 02:35:12,926 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-17 02:35:12,927 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-17 02:35:12,928 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-17 02:35:12,931 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-09-17 02:35:12,939 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-17 02:35:12,940 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-17 02:35:12,941 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-17 02:35:12,942 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-09-17 02:35:12,975 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-17 02:35:12,975 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-17 02:35:12,977 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-17 02:35:12,977 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-17 02:35:12,977 INFO L138 SettingsManager]: * Use SBE=true [2020-09-17 02:35:12,978 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-17 02:35:12,978 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-17 02:35:12,978 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-17 02:35:12,978 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-17 02:35:12,979 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-17 02:35:12,979 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-17 02:35:12,979 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-17 02:35:12,979 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-17 02:35:12,979 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-17 02:35:12,980 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-17 02:35:12,980 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-17 02:35:12,980 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-17 02:35:12,980 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-17 02:35:12,980 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-17 02:35:12,981 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-17 02:35:12,981 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-17 02:35:12,981 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 02:35:12,981 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-17 02:35:12,982 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-17 02:35:12,982 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-17 02:35:12,982 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-17 02:35:12,982 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-17 02:35:12,982 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-17 02:35:12,983 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-17 02:35:13,516 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-17 02:35:13,541 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-17 02:35:13,546 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-17 02:35:13,548 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-17 02:35:13,549 INFO L275 PluginConnector]: CDTParser initialized [2020-09-17 02:35:13,550 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-09-17 02:35:13,655 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b8ff8749/2356836fc65940d1b3d49acd184d5d6b/FLAGde118abbd [2020-09-17 02:35:14,381 INFO L306 CDTParser]: Found 1 translation units. [2020-09-17 02:35:14,382 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-1.i [2020-09-17 02:35:14,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b8ff8749/2356836fc65940d1b3d49acd184d5d6b/FLAGde118abbd [2020-09-17 02:35:14,657 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b8ff8749/2356836fc65940d1b3d49acd184d5d6b [2020-09-17 02:35:14,670 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-17 02:35:14,677 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-17 02:35:14,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-17 02:35:14,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-17 02:35:14,683 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-17 02:35:14,684 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:35:14" (1/1) ... [2020-09-17 02:35:14,689 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4c5eff2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:14, skipping insertion in model container [2020-09-17 02:35:14,690 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 02:35:14" (1/1) ... [2020-09-17 02:35:14,700 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-17 02:35:14,760 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-17 02:35:15,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 02:35:15,356 INFO L203 MainTranslator]: Completed pre-run [2020-09-17 02:35:15,460 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-17 02:35:15,573 INFO L208 MainTranslator]: Completed translation [2020-09-17 02:35:15,573 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:15 WrapperNode [2020-09-17 02:35:15,574 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-17 02:35:15,575 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-17 02:35:15,575 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-17 02:35:15,575 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-17 02:35:15,590 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:15" (1/1) ... [2020-09-17 02:35:15,612 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:15" (1/1) ... [2020-09-17 02:35:15,646 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-17 02:35:15,647 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-17 02:35:15,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-17 02:35:15,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-17 02:35:15,662 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:15" (1/1) ... [2020-09-17 02:35:15,662 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:15" (1/1) ... [2020-09-17 02:35:15,666 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:15" (1/1) ... [2020-09-17 02:35:15,666 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:15" (1/1) ... [2020-09-17 02:35:15,674 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:15" (1/1) ... [2020-09-17 02:35:15,682 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:15" (1/1) ... [2020-09-17 02:35:15,685 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:15" (1/1) ... [2020-09-17 02:35:15,689 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-17 02:35:15,689 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-17 02:35:15,690 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-17 02:35:15,690 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-17 02:35:15,691 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-17 02:35:15,795 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-17 02:35:15,796 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-17 02:35:15,796 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-17 02:35:15,796 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-17 02:35:15,796 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-17 02:35:15,796 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-17 02:35:15,797 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-17 02:35:15,797 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-17 02:35:15,797 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-17 02:35:15,798 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-17 02:35:15,798 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-17 02:35:15,801 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-17 02:35:16,200 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-17 02:35:16,201 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-17 02:35:16,207 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:35:16 BoogieIcfgContainer [2020-09-17 02:35:16,208 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-17 02:35:16,210 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-17 02:35:16,210 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-17 02:35:16,215 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-17 02:35:16,215 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 02:35:14" (1/3) ... [2020-09-17 02:35:16,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfb91fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:35:16, skipping insertion in model container [2020-09-17 02:35:16,217 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 02:35:15" (2/3) ... [2020-09-17 02:35:16,217 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3bfb91fc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 02:35:16, skipping insertion in model container [2020-09-17 02:35:16,218 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 02:35:16" (3/3) ... [2020-09-17 02:35:16,220 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longest-1.i [2020-09-17 02:35:16,253 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-17 02:35:16,253 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-17 02:35:16,265 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-17 02:35:16,267 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-17 02:35:16,303 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,304 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,304 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,304 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,305 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,306 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,306 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,306 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,306 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,307 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,307 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,308 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,308 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,308 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,309 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,309 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,310 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,310 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,310 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,311 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,311 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,311 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,312 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,312 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,312 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,313 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,313 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,314 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,319 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,320 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,320 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,321 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,321 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,321 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,331 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,332 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,332 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,332 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,333 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,333 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-17 02:35:16,358 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-17 02:35:16,386 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-17 02:35:16,386 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-17 02:35:16,387 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-17 02:35:16,387 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-17 02:35:16,387 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-17 02:35:16,387 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-17 02:35:16,387 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-17 02:35:16,388 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-17 02:35:16,408 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-17 02:35:16,411 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 02:35:16,461 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 02:35:16,462 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 02:35:16,470 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-17 02:35:16,473 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-17 02:35:16,496 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-17 02:35:16,497 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-17 02:35:16,498 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-17 02:35:16,500 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-17 02:35:16,502 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-17 02:35:17,767 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-17 02:35:18,029 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-17 02:35:18,030 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-17 02:35:18,035 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-17 02:35:18,051 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-17 02:35:18,054 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-17 02:35:18,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-17 02:35:18,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:18,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-17 02:35:18,066 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:18,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:18,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-17 02:35:18,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:18,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222437739] [2020-09-17 02:35:18,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:18,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:18,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222437739] [2020-09-17 02:35:18,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:35:18,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-17 02:35:18,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150163871] [2020-09-17 02:35:18,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-17 02:35:18,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:18,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-17 02:35:18,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-17 02:35:18,409 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-17 02:35:18,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:18,534 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-17 02:35:18,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-17 02:35:18,537 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-17 02:35:18,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:18,552 INFO L225 Difference]: With dead ends: 75 [2020-09-17 02:35:18,552 INFO L226 Difference]: Without dead ends: 42 [2020-09-17 02:35:18,554 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 [2020-09-17 02:35:18,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-17 02:35:18,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-17 02:35:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:35:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-17 02:35:18,599 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-17 02:35:18,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:18,599 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-17 02:35:18,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-17 02:35:18,600 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-17 02:35:18,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-17 02:35:18,600 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:18,601 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:18,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-17 02:35:18,601 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:18,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-17 02:35:18,602 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:18,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977993574] [2020-09-17 02:35:18,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:18,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:18,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977993574] [2020-09-17 02:35:18,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:35:18,769 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-17 02:35:18,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [439196035] [2020-09-17 02:35:18,771 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-17 02:35:18,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:18,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-17 02:35:18,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-17 02:35:18,773 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-17 02:35:18,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:18,814 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-17 02:35:18,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-17 02:35:18,815 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-17 02:35:18,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:18,816 INFO L225 Difference]: With dead ends: 56 [2020-09-17 02:35:18,816 INFO L226 Difference]: Without dead ends: 50 [2020-09-17 02:35:18,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:35:18,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-17 02:35:18,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-17 02:35:18,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:35:18,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-17 02:35:18,826 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-17 02:35:18,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:18,828 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-17 02:35:18,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-17 02:35:18,828 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-17 02:35:18,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:35:18,829 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:18,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:18,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-17 02:35:18,830 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:18,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:18,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-17 02:35:18,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:18,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945716375] [2020-09-17 02:35:18,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:18,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:18,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945716375] [2020-09-17 02:35:18,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:35:18,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:35:18,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966974965] [2020-09-17 02:35:18,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:35:18,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:18,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:35:18,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:35:18,956 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-17 02:35:19,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:19,079 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-17 02:35:19,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:35:19,080 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:35:19,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:19,082 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:35:19,082 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:35:19,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:19,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:35:19,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-17 02:35:19,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:35:19,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-17 02:35:19,093 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-17 02:35:19,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:19,093 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-17 02:35:19,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:35:19,094 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-17 02:35:19,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:35:19,095 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:19,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:19,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-17 02:35:19,095 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:19,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:19,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-17 02:35:19,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:19,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185327292] [2020-09-17 02:35:19,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:19,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:19,200 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:19,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185327292] [2020-09-17 02:35:19,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:35:19,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:35:19,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352217155] [2020-09-17 02:35:19,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:35:19,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:19,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:35:19,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:35:19,202 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-17 02:35:19,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:19,289 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-17 02:35:19,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:35:19,289 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:35:19,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:19,290 INFO L225 Difference]: With dead ends: 54 [2020-09-17 02:35:19,291 INFO L226 Difference]: Without dead ends: 43 [2020-09-17 02:35:19,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:19,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-17 02:35:19,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-17 02:35:19,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-17 02:35:19,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-17 02:35:19,297 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-17 02:35:19,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:19,298 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-17 02:35:19,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:35:19,298 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-17 02:35:19,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-17 02:35:19,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:19,299 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:19,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-17 02:35:19,300 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:19,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:19,300 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-17 02:35:19,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:19,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64372772] [2020-09-17 02:35:19,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:19,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:19,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:19,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64372772] [2020-09-17 02:35:19,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-17 02:35:19,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-17 02:35:19,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84484435] [2020-09-17 02:35:19,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-17 02:35:19,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:19,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-17 02:35:19,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-17 02:35:19,377 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-17 02:35:19,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:19,451 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-17 02:35:19,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-17 02:35:19,452 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-17 02:35:19,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:19,453 INFO L225 Difference]: With dead ends: 57 [2020-09-17 02:35:19,454 INFO L226 Difference]: Without dead ends: 51 [2020-09-17 02:35:19,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:19,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-17 02:35:19,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-17 02:35:19,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-17 02:35:19,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-17 02:35:19,460 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-17 02:35:19,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:19,461 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-17 02:35:19,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-17 02:35:19,461 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-17 02:35:19,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:35:19,462 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:19,462 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:19,462 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-17 02:35:19,462 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:19,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:19,463 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-17 02:35:19,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:19,464 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207265666] [2020-09-17 02:35:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:19,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:19,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:19,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207265666] [2020-09-17 02:35:19,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780932481] [2020-09-17 02:35:19,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:19,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:19,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:19,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:35:19,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:19,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:19,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:19,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:19,725 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-17 02:35:19,725 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282197409] [2020-09-17 02:35:19,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:35:19,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:19,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:35:19,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:35:19,727 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-17 02:35:19,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:19,844 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-17 02:35:19,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:35:19,845 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 02:35:19,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:19,846 INFO L225 Difference]: With dead ends: 48 [2020-09-17 02:35:19,846 INFO L226 Difference]: Without dead ends: 43 [2020-09-17 02:35:19,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:19,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-17 02:35:19,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-17 02:35:19,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-17 02:35:19,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-17 02:35:19,852 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-17 02:35:19,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:19,853 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-17 02:35:19,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:35:19,853 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-17 02:35:19,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:35:19,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:19,854 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:20,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-17 02:35:20,069 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:20,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:20,070 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-17 02:35:20,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:20,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578318300] [2020-09-17 02:35:20,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:20,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:20,175 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:20,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578318300] [2020-09-17 02:35:20,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298449026] [2020-09-17 02:35:20,177 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:20,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:20,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:20,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:35:20,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:20,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:20,291 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:20,291 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 02:35:20,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61203923] [2020-09-17 02:35:20,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 02:35:20,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:20,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 02:35:20,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-17 02:35:20,293 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-17 02:35:20,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:20,397 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-17 02:35:20,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-17 02:35:20,399 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-17 02:35:20,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:20,399 INFO L225 Difference]: With dead ends: 54 [2020-09-17 02:35:20,400 INFO L226 Difference]: Without dead ends: 48 [2020-09-17 02:35:20,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:20,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-17 02:35:20,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-17 02:35:20,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:35:20,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-17 02:35:20,407 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-17 02:35:20,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:20,407 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-17 02:35:20,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 02:35:20,408 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-17 02:35:20,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:35:20,409 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:20,409 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:20,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:20,610 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:20,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:20,611 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-17 02:35:20,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:20,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686748390] [2020-09-17 02:35:20,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:20,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:20,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:20,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686748390] [2020-09-17 02:35:20,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990162963] [2020-09-17 02:35:20,738 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:20,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:35:20,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:20,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:35:20,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:20,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:20,837 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:20,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:20,838 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-17 02:35:20,838 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624788595] [2020-09-17 02:35:20,839 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:35:20,839 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:20,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:35:20,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:35:20,839 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-17 02:35:20,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:20,976 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-17 02:35:20,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-17 02:35:20,977 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 02:35:20,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:20,978 INFO L225 Difference]: With dead ends: 58 [2020-09-17 02:35:20,978 INFO L226 Difference]: Without dead ends: 52 [2020-09-17 02:35:20,979 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:20,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-17 02:35:20,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-17 02:35:20,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-17 02:35:20,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-17 02:35:20,984 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-17 02:35:20,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:20,985 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-17 02:35:20,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:35:20,985 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-17 02:35:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:35:20,986 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:20,986 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:21,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:21,201 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:21,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:21,201 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-17 02:35:21,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:21,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307661120] [2020-09-17 02:35:21,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:21,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:21,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307661120] [2020-09-17 02:35:21,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325485650] [2020-09-17 02:35:21,307 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:21,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:21,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-17 02:35:21,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:21,406 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:21,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:21,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-17 02:35:21,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396728015] [2020-09-17 02:35:21,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-17 02:35:21,408 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:21,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-17 02:35:21,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-17 02:35:21,409 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-17 02:35:21,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:21,587 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-17 02:35:21,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:35:21,588 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-17 02:35:21,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:21,590 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:35:21,590 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 02:35:21,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:21,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 02:35:21,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-17 02:35:21,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:35:21,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-17 02:35:21,598 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-17 02:35:21,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:21,598 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-17 02:35:21,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-17 02:35:21,598 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-17 02:35:21,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-17 02:35:21,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:21,599 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:21,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:21,801 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:21,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:21,801 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-17 02:35:21,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:21,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788368893] [2020-09-17 02:35:21,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:21,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:21,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:21,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788368893] [2020-09-17 02:35:21,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379203903] [2020-09-17 02:35:21,878 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:21,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:21,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:21,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:35:21,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:21,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:21,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-17 02:35:21,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122719714] [2020-09-17 02:35:21,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:35:21,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:21,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:35:21,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:35:21,980 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-17 02:35:22,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:22,215 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-17 02:35:22,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:35:22,217 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-17 02:35:22,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:22,218 INFO L225 Difference]: With dead ends: 62 [2020-09-17 02:35:22,218 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 02:35:22,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:35:22,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 02:35:22,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-17 02:35:22,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-17 02:35:22,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-17 02:35:22,223 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-17 02:35:22,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:22,224 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-17 02:35:22,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:35:22,224 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-17 02:35:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:35:22,225 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:22,225 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:22,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-17 02:35:22,437 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:22,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:22,438 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-17 02:35:22,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:22,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508460850] [2020-09-17 02:35:22,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:22,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508460850] [2020-09-17 02:35:22,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300214258] [2020-09-17 02:35:22,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:22,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-17 02:35:22,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:22,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:35:22,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:22,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:22,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 02:35:22,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216483219] [2020-09-17 02:35:22,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:35:22,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:22,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:35:22,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:35:22,607 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-17 02:35:22,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:22,741 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-17 02:35:22,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:35:22,742 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-17 02:35:22,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:22,743 INFO L225 Difference]: With dead ends: 64 [2020-09-17 02:35:22,743 INFO L226 Difference]: Without dead ends: 58 [2020-09-17 02:35:22,743 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:22,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-17 02:35:22,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-17 02:35:22,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-17 02:35:22,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-17 02:35:22,752 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-17 02:35:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:22,752 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-17 02:35:22,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:35:22,752 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-17 02:35:22,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:35:22,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:22,753 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:22,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:22,955 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:22,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:22,956 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-17 02:35:22,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:22,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964535979] [2020-09-17 02:35:22,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:22,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:23,047 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:23,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964535979] [2020-09-17 02:35:23,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976157131] [2020-09-17 02:35:23,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:23,104 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:23,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:23,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:35:23,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:23,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:23,155 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:23,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:23,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-17 02:35:23,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607216717] [2020-09-17 02:35:23,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:35:23,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:23,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:35:23,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:23,158 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-17 02:35:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:23,386 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-17 02:35:23,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:35:23,386 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 02:35:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:23,387 INFO L225 Difference]: With dead ends: 61 [2020-09-17 02:35:23,387 INFO L226 Difference]: Without dead ends: 55 [2020-09-17 02:35:23,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:35:23,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-17 02:35:23,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-17 02:35:23,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-17 02:35:23,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-17 02:35:23,392 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-17 02:35:23,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:23,393 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-17 02:35:23,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:35:23,393 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-17 02:35:23,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:35:23,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:23,394 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:23,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:23,606 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:23,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:23,607 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-17 02:35:23,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:23,608 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088952977] [2020-09-17 02:35:23,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:23,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:23,708 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:23,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088952977] [2020-09-17 02:35:23,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706279857] [2020-09-17 02:35:23,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:23,779 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:23,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:23,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:35:23,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:23,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:23,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:23,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-17 02:35:23,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13655262] [2020-09-17 02:35:23,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-17 02:35:23,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:23,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-17 02:35:23,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-17 02:35:23,812 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-17 02:35:24,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:24,003 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-17 02:35:24,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:35:24,004 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-17 02:35:24,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:24,005 INFO L225 Difference]: With dead ends: 77 [2020-09-17 02:35:24,006 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:35:24,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:35:24,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:35:24,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-17 02:35:24,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-17 02:35:24,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-17 02:35:24,026 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-17 02:35:24,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:24,027 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-17 02:35:24,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-17 02:35:24,027 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-17 02:35:24,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:35:24,029 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:24,029 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:24,243 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-17 02:35:24,244 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:24,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:24,244 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-17 02:35:24,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:24,245 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591346447] [2020-09-17 02:35:24,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:24,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:24,395 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:24,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591346447] [2020-09-17 02:35:24,396 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279299652] [2020-09-17 02:35:24,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:24,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-17 02:35:24,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:24,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:35:24,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:24,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:24,490 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:24,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:24,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-17 02:35:24,492 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404973835] [2020-09-17 02:35:24,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:35:24,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:24,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:35:24,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:24,493 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-17 02:35:24,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:24,767 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-09-17 02:35:24,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:35:24,767 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 02:35:24,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:24,768 INFO L225 Difference]: With dead ends: 58 [2020-09-17 02:35:24,768 INFO L226 Difference]: Without dead ends: 50 [2020-09-17 02:35:24,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:35:24,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-17 02:35:24,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-09-17 02:35:24,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-17 02:35:24,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-17 02:35:24,772 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-17 02:35:24,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:24,773 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-17 02:35:24,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:35:24,773 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-17 02:35:24,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-17 02:35:24,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:24,774 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:24,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:24,975 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:24,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:24,975 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-17 02:35:24,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:24,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497734735] [2020-09-17 02:35:24,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:25,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:25,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497734735] [2020-09-17 02:35:25,051 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723507740] [2020-09-17 02:35:25,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:25,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:25,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-17 02:35:25,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:25,116 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:25,132 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:25,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:25,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-17 02:35:25,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986399376] [2020-09-17 02:35:25,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:35:25,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:25,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:35:25,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:25,135 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-17 02:35:25,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:25,345 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-17 02:35:25,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:35:25,345 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-17 02:35:25,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:25,347 INFO L225 Difference]: With dead ends: 60 [2020-09-17 02:35:25,347 INFO L226 Difference]: Without dead ends: 55 [2020-09-17 02:35:25,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:35:25,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-17 02:35:25,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-17 02:35:25,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:35:25,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-17 02:35:25,352 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-17 02:35:25,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:25,352 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-17 02:35:25,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:35:25,353 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-17 02:35:25,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:35:25,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:25,353 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:25,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-17 02:35:25,565 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:25,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:25,566 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-17 02:35:25,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:25,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61463846] [2020-09-17 02:35:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:25,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:25,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:25,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61463846] [2020-09-17 02:35:25,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52443305] [2020-09-17 02:35:25,660 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:25,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:25,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:25,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:35:25,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:25,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:25,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:25,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:35:25,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345278063] [2020-09-17 02:35:25,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:35:25,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:25,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:35:25,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:25,797 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-17 02:35:26,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:26,065 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-17 02:35:26,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:35:26,066 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:35:26,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:26,067 INFO L225 Difference]: With dead ends: 54 [2020-09-17 02:35:26,068 INFO L226 Difference]: Without dead ends: 49 [2020-09-17 02:35:26,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:26,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-17 02:35:26,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-17 02:35:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-17 02:35:26,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-17 02:35:26,078 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-17 02:35:26,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:26,078 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-17 02:35:26,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:35:26,078 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-17 02:35:26,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:35:26,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:26,079 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:26,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-17 02:35:26,294 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:26,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:26,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-17 02:35:26,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:26,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084103659] [2020-09-17 02:35:26,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:26,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:26,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:26,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084103659] [2020-09-17 02:35:26,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282465565] [2020-09-17 02:35:26,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:26,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:35:26,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:26,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:35:26,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:26,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:26,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:26,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 02:35:26,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174825279] [2020-09-17 02:35:26,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:35:26,513 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:26,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:35:26,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:26,513 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-17 02:35:26,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:26,673 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-17 02:35:26,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-17 02:35:26,674 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-17 02:35:26,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:26,675 INFO L225 Difference]: With dead ends: 60 [2020-09-17 02:35:26,675 INFO L226 Difference]: Without dead ends: 54 [2020-09-17 02:35:26,676 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:35:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-17 02:35:26,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-17 02:35:26,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:35:26,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-17 02:35:26,684 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-17 02:35:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:26,685 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-17 02:35:26,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:35:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-17 02:35:26,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:35:26,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:26,686 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:26,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-17 02:35:26,887 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:26,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:26,889 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-17 02:35:26,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:26,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691041344] [2020-09-17 02:35:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:26,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:26,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691041344] [2020-09-17 02:35:26,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055385219] [2020-09-17 02:35:26,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:27,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:27,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:27,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:35:27,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:27,089 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:27,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:27,109 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:27,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:35:27,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168689168] [2020-09-17 02:35:27,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:35:27,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:27,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:35:27,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:27,111 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-17 02:35:27,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:27,322 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-17 02:35:27,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-17 02:35:27,322 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:35:27,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:27,323 INFO L225 Difference]: With dead ends: 66 [2020-09-17 02:35:27,323 INFO L226 Difference]: Without dead ends: 60 [2020-09-17 02:35:27,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:35:27,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-17 02:35:27,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-17 02:35:27,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-17 02:35:27,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-17 02:35:27,327 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-17 02:35:27,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:27,327 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-17 02:35:27,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:35:27,328 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-17 02:35:27,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:35:27,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:27,328 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:27,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-17 02:35:27,539 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:27,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:27,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-17 02:35:27,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:27,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140378339] [2020-09-17 02:35:27,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:27,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:27,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:27,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140378339] [2020-09-17 02:35:27,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518856257] [2020-09-17 02:35:27,641 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:27,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:35:27,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:27,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:35:27,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:27,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:27,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:27,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 02:35:27,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374813694] [2020-09-17 02:35:27,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:35:27,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:27,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:35:27,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:27,737 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-17 02:35:27,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:27,936 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-17 02:35:27,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:35:27,936 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-17 02:35:27,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:27,937 INFO L225 Difference]: With dead ends: 67 [2020-09-17 02:35:27,938 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:35:27,938 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:35:27,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:35:27,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-17 02:35:27,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-17 02:35:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-17 02:35:27,943 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-17 02:35:27,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:27,943 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-17 02:35:27,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:35:27,943 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-17 02:35:27,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:35:27,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:27,944 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:28,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:28,145 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:28,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:28,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-17 02:35:28,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:28,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101499762] [2020-09-17 02:35:28,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:28,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101499762] [2020-09-17 02:35:28,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279916145] [2020-09-17 02:35:28,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:28,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:35:28,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:28,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:35:28,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:28,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:28,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:28,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:28,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:35:28,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274340230] [2020-09-17 02:35:28,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:35:28,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:28,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:35:28,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:28,371 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-17 02:35:28,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:28,643 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-17 02:35:28,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:35:28,644 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:35:28,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:28,645 INFO L225 Difference]: With dead ends: 69 [2020-09-17 02:35:28,645 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 02:35:28,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:28,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 02:35:28,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-17 02:35:28,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:35:28,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-17 02:35:28,652 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-17 02:35:28,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:28,652 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-17 02:35:28,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:35:28,653 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-17 02:35:28,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:35:28,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:28,654 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:28,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:28,869 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:28,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:28,870 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-17 02:35:28,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:28,870 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097032858] [2020-09-17 02:35:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:28,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:28,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097032858] [2020-09-17 02:35:28,949 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526752796] [2020-09-17 02:35:28,949 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:28,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:28,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-17 02:35:28,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:29,009 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:29,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:29,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-17 02:35:29,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666334650] [2020-09-17 02:35:29,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-17 02:35:29,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:29,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-17 02:35:29,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-17 02:35:29,011 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-17 02:35:29,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:29,250 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-17 02:35:29,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:35:29,252 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-17 02:35:29,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:29,253 INFO L225 Difference]: With dead ends: 88 [2020-09-17 02:35:29,253 INFO L226 Difference]: Without dead ends: 82 [2020-09-17 02:35:29,253 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:29,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-17 02:35:29,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-17 02:35:29,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:35:29,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-17 02:35:29,259 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-17 02:35:29,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:29,259 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-17 02:35:29,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-17 02:35:29,259 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-17 02:35:29,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-17 02:35:29,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:29,260 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:29,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:29,460 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:29,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:29,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-17 02:35:29,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:29,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533340694] [2020-09-17 02:35:29,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:29,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533340694] [2020-09-17 02:35:29,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503727845] [2020-09-17 02:35:29,539 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:29,597 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:29,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:29,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:35:29,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:29,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:29,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:29,628 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-17 02:35:29,628 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766549456] [2020-09-17 02:35:29,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:35:29,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:29,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:35:29,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:29,630 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-17 02:35:29,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:29,935 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-17 02:35:29,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:35:29,940 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-17 02:35:29,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:29,941 INFO L225 Difference]: With dead ends: 69 [2020-09-17 02:35:29,941 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:35:29,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:35:29,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:35:29,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-17 02:35:29,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-17 02:35:29,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-17 02:35:29,944 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-17 02:35:29,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:29,945 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-17 02:35:29,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:35:29,945 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-17 02:35:29,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:29,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:29,946 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:30,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-17 02:35:30,154 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:30,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:30,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-17 02:35:30,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:30,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000142505] [2020-09-17 02:35:30,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:30,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:30,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000142505] [2020-09-17 02:35:30,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674521359] [2020-09-17 02:35:30,267 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:30,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:35:30,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:30,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:35:30,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:30,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:30,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:30,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 02:35:30,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561219200] [2020-09-17 02:35:30,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:35:30,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:30,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:35:30,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:30,336 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-17 02:35:30,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:30,501 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-17 02:35:30,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:35:30,502 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-17 02:35:30,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:30,503 INFO L225 Difference]: With dead ends: 74 [2020-09-17 02:35:30,503 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 02:35:30,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:35:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 02:35:30,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-17 02:35:30,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 02:35:30,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-17 02:35:30,507 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-17 02:35:30,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:30,507 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-17 02:35:30,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:35:30,507 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-17 02:35:30,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:30,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:30,508 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:30,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-17 02:35:30,719 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:30,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:30,720 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-17 02:35:30,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:30,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14384199] [2020-09-17 02:35:30,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:30,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:30,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:30,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14384199] [2020-09-17 02:35:30,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1180969726] [2020-09-17 02:35:30,819 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:30,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:30,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:30,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:35:30,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:30,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:30,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:30,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:30,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:35:30,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325595113] [2020-09-17 02:35:30,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:30,933 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:30,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:30,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:30,934 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-17 02:35:31,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:31,201 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-17 02:35:31,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:35:31,201 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:35:31,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:31,202 INFO L225 Difference]: With dead ends: 71 [2020-09-17 02:35:31,203 INFO L226 Difference]: Without dead ends: 65 [2020-09-17 02:35:31,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:31,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-17 02:35:31,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-17 02:35:31,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:35:31,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-17 02:35:31,206 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-17 02:35:31,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:31,207 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-17 02:35:31,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:31,207 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-17 02:35:31,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:31,207 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:31,207 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:31,408 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-17 02:35:31,409 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:31,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:31,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-17 02:35:31,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:31,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891202560] [2020-09-17 02:35:31,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:31,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:31,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891202560] [2020-09-17 02:35:31,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286764598] [2020-09-17 02:35:31,526 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:31,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-17 02:35:31,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:31,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:35:31,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:31,615 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:31,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:31,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 02:35:31,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959668085] [2020-09-17 02:35:31,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:35:31,616 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:31,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:35:31,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:31,619 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-17 02:35:31,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:31,862 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-17 02:35:31,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:35:31,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-17 02:35:31,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:31,863 INFO L225 Difference]: With dead ends: 68 [2020-09-17 02:35:31,863 INFO L226 Difference]: Without dead ends: 62 [2020-09-17 02:35:31,864 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:35:31,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-17 02:35:31,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-17 02:35:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 02:35:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-17 02:35:31,866 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-17 02:35:31,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:31,867 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-17 02:35:31,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:35:31,867 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-17 02:35:31,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:31,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:31,868 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:32,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-17 02:35:32,076 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:32,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:32,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-17 02:35:32,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:32,077 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063194886] [2020-09-17 02:35:32,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:32,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:32,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:32,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063194886] [2020-09-17 02:35:32,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532630667] [2020-09-17 02:35:32,174 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:32,230 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-17 02:35:32,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:32,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:35:32,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:32,255 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:32,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:32,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:32,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:35:32,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101456613] [2020-09-17 02:35:32,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:32,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:32,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:32,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:32,277 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-17 02:35:32,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:32,619 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-17 02:35:32,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:35:32,620 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:35:32,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:32,621 INFO L225 Difference]: With dead ends: 67 [2020-09-17 02:35:32,621 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:35:32,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:35:32,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:35:32,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-17 02:35:32,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:35:32,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-17 02:35:32,625 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-17 02:35:32,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:32,625 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-17 02:35:32,625 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:32,625 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-17 02:35:32,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:32,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:32,626 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:32,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-17 02:35:32,828 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:32,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:32,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-17 02:35:32,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:32,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548139421] [2020-09-17 02:35:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:32,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548139421] [2020-09-17 02:35:32,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907950290] [2020-09-17 02:35:32,924 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:32,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:35:32,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:33,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:33,004 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:33,004 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-17 02:35:33,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935407522] [2020-09-17 02:35:33,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-17 02:35:33,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:33,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-17 02:35:33,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-17 02:35:33,005 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-17 02:35:33,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:33,316 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-17 02:35:33,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:35:33,317 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-17 02:35:33,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:33,318 INFO L225 Difference]: With dead ends: 83 [2020-09-17 02:35:33,318 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:35:33,318 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:35:33,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:35:33,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-17 02:35:33,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:35:33,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-17 02:35:33,321 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-17 02:35:33,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:33,322 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-17 02:35:33,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-17 02:35:33,322 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-17 02:35:33,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:33,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:33,323 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:33,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:33,532 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:33,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:33,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-17 02:35:33,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:33,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012797534] [2020-09-17 02:35:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:33,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:33,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:33,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012797534] [2020-09-17 02:35:33,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076488065] [2020-09-17 02:35:33,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:33,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:33,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:33,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:35:33,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:33,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:33,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:33,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:33,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:35:33,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817337392] [2020-09-17 02:35:33,728 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:33,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:33,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:33,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:33,729 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-17 02:35:34,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:34,111 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-09-17 02:35:34,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:35:34,111 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:35:34,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:34,112 INFO L225 Difference]: With dead ends: 64 [2020-09-17 02:35:34,112 INFO L226 Difference]: Without dead ends: 56 [2020-09-17 02:35:34,113 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=370, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:35:34,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-09-17 02:35:34,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 41. [2020-09-17 02:35:34,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-17 02:35:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-17 02:35:34,115 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-17 02:35:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:34,116 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-17 02:35:34,116 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-17 02:35:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-17 02:35:34,116 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:34,116 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:34,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-17 02:35:34,324 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:34,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:34,325 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-17 02:35:34,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:34,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805989195] [2020-09-17 02:35:34,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:34,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805989195] [2020-09-17 02:35:34,406 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138534457] [2020-09-17 02:35:34,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:34,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-17 02:35:34,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:34,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-17 02:35:34,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:34,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:34,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:34,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:34,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-17 02:35:34,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41917695] [2020-09-17 02:35:34,490 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:34,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:34,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:34,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:34,491 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-17 02:35:34,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:34,853 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-17 02:35:34,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:35:34,854 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-17 02:35:34,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:34,855 INFO L225 Difference]: With dead ends: 68 [2020-09-17 02:35:34,855 INFO L226 Difference]: Without dead ends: 63 [2020-09-17 02:35:34,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:35:34,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-17 02:35:34,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-17 02:35:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:35:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-17 02:35:34,860 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-17 02:35:34,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:34,860 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-17 02:35:34,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:34,860 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-17 02:35:34,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:34,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:34,861 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:35,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-17 02:35:35,065 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:35,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:35,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-17 02:35:35,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:35,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940753941] [2020-09-17 02:35:35,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:35,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:35,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940753941] [2020-09-17 02:35:35,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873867344] [2020-09-17 02:35:35,169 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:35,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:35,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:35,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:35,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:35,242 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:35,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:35,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:35:35,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152027566] [2020-09-17 02:35:35,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:35,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:35,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:35,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:35,254 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-17 02:35:35,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:35,627 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-17 02:35:35,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:35:35,628 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:35:35,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:35,629 INFO L225 Difference]: With dead ends: 60 [2020-09-17 02:35:35,629 INFO L226 Difference]: Without dead ends: 55 [2020-09-17 02:35:35,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:35:35,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-17 02:35:35,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-17 02:35:35,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-17 02:35:35,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-17 02:35:35,633 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-17 02:35:35,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:35,633 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-17 02:35:35,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:35,634 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-17 02:35:35,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:35,634 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:35,634 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:35,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:35,844 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:35,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:35,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-17 02:35:35,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:35,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818826658] [2020-09-17 02:35:35,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:35,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:35,953 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:35,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818826658] [2020-09-17 02:35:35,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380122388] [2020-09-17 02:35:35,953 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:36,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:35:36,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:36,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:36,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:36,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:36,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:35:36,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130357581] [2020-09-17 02:35:36,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:36,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:36,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:36,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:36,032 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-17 02:35:36,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:36,198 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-17 02:35:36,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-17 02:35:36,198 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:35:36,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:36,199 INFO L225 Difference]: With dead ends: 66 [2020-09-17 02:35:36,200 INFO L226 Difference]: Without dead ends: 60 [2020-09-17 02:35:36,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:35:36,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-17 02:35:36,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-17 02:35:36,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:35:36,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-17 02:35:36,204 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-17 02:35:36,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:36,204 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-17 02:35:36,204 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:36,205 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-17 02:35:36,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:36,205 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:36,205 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:36,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:36,416 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:36,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:36,417 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-17 02:35:36,417 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:36,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846784998] [2020-09-17 02:35:36,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:36,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:36,539 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:36,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846784998] [2020-09-17 02:35:36,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340108409] [2020-09-17 02:35:36,540 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:36,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:35:36,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:36,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:36,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:36,608 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:36,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:36,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:36,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:35:36,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853947932] [2020-09-17 02:35:36,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:36,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:36,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:36,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:36,625 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-17 02:35:36,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:36,865 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-17 02:35:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-17 02:35:36,866 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:35:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:36,867 INFO L225 Difference]: With dead ends: 74 [2020-09-17 02:35:36,867 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 02:35:36,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:35:36,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 02:35:36,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-17 02:35:36,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-17 02:35:36,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-17 02:35:36,870 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-17 02:35:36,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:36,870 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-17 02:35:36,870 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:36,870 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-17 02:35:36,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:36,871 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:36,871 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:37,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-17 02:35:37,072 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:37,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:37,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-17 02:35:37,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:37,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324661695] [2020-09-17 02:35:37,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:37,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:37,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:37,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324661695] [2020-09-17 02:35:37,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591600381] [2020-09-17 02:35:37,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:37,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:37,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:37,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:37,249 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:37,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:37,249 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:35:37,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708472954] [2020-09-17 02:35:37,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:37,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:37,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:37,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:37,252 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-17 02:35:37,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:37,500 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-17 02:35:37,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:35:37,501 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:35:37,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:37,502 INFO L225 Difference]: With dead ends: 75 [2020-09-17 02:35:37,502 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 02:35:37,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:35:37,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 02:35:37,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-17 02:35:37,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-17 02:35:37,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-17 02:35:37,505 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-17 02:35:37,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:37,505 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-17 02:35:37,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:37,506 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-17 02:35:37,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:37,506 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:37,506 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:37,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:37,715 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:37,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:37,716 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-17 02:35:37,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:37,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097516503] [2020-09-17 02:35:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:37,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:37,833 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:37,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097516503] [2020-09-17 02:35:37,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007124493] [2020-09-17 02:35:37,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:37,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:37,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:37,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:37,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:37,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:37,926 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:37,926 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:35:37,926 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081240127] [2020-09-17 02:35:37,927 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:37,927 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:37,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:37,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:37,928 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-17 02:35:38,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:38,281 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-17 02:35:38,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:35:38,282 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:35:38,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:38,283 INFO L225 Difference]: With dead ends: 79 [2020-09-17 02:35:38,283 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:35:38,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:35:38,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:35:38,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-17 02:35:38,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:35:38,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-17 02:35:38,286 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-17 02:35:38,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:38,287 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-17 02:35:38,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:38,287 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-17 02:35:38,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:38,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:38,288 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:38,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-17 02:35:38,488 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:38,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:38,489 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-17 02:35:38,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:38,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683776340] [2020-09-17 02:35:38,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:38,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683776340] [2020-09-17 02:35:38,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968144790] [2020-09-17 02:35:38,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:38,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:35:38,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:38,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:38,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:38,702 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:38,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:38,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:35:38,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261580102] [2020-09-17 02:35:38,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:38,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:38,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:38,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:38,704 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-17 02:35:38,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:38,984 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-17 02:35:38,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:35:38,985 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:35:38,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:38,986 INFO L225 Difference]: With dead ends: 79 [2020-09-17 02:35:38,986 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:35:38,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:35:38,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:35:38,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-17 02:35:38,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-17 02:35:38,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-17 02:35:38,990 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-17 02:35:38,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:38,990 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-17 02:35:38,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:38,990 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-17 02:35:38,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:38,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:38,991 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:39,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:39,201 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:39,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:39,201 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-17 02:35:39,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:39,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77683577] [2020-09-17 02:35:39,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:39,299 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:39,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77683577] [2020-09-17 02:35:39,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979417238] [2020-09-17 02:35:39,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:39,351 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:39,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:39,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:39,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:39,375 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:39,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:39,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:39,388 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:35:39,388 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688088524] [2020-09-17 02:35:39,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:39,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:39,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:39,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:39,389 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-17 02:35:39,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:39,798 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-17 02:35:39,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:35:39,799 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:35:39,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:39,800 INFO L225 Difference]: With dead ends: 76 [2020-09-17 02:35:39,800 INFO L226 Difference]: Without dead ends: 70 [2020-09-17 02:35:39,801 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:35:39,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-17 02:35:39,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-17 02:35:39,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:35:39,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-17 02:35:39,804 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-17 02:35:39,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:39,804 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-17 02:35:39,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:39,804 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-17 02:35:39,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:39,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:39,805 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:40,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-17 02:35:40,011 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:40,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:40,011 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-17 02:35:40,011 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:40,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960699049] [2020-09-17 02:35:40,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:40,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:40,114 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:40,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960699049] [2020-09-17 02:35:40,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548566479] [2020-09-17 02:35:40,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:40,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:35:40,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:40,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-17 02:35:40,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:40,197 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:40,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:40,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-17 02:35:40,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059342888] [2020-09-17 02:35:40,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-17 02:35:40,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-17 02:35:40,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-17 02:35:40,199 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-17 02:35:40,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:40,573 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-17 02:35:40,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:35:40,574 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-17 02:35:40,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:40,576 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:35:40,576 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:35:40,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:35:40,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:35:40,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-17 02:35:40,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:35:40,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-17 02:35:40,581 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-17 02:35:40,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:40,581 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-17 02:35:40,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-17 02:35:40,582 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-17 02:35:40,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-17 02:35:40,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:40,582 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:40,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-17 02:35:40,794 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:40,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:40,795 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-17 02:35:40,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:40,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044399061] [2020-09-17 02:35:40,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:40,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:40,931 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044399061] [2020-09-17 02:35:40,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052620413] [2020-09-17 02:35:40,932 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:40,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:35:40,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:40,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:40,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:41,033 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:41,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:41,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-17 02:35:41,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163422043] [2020-09-17 02:35:41,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:41,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:41,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:41,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:41,035 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-17 02:35:41,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:41,441 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-17 02:35:41,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:35:41,442 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-17 02:35:41,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:41,443 INFO L225 Difference]: With dead ends: 77 [2020-09-17 02:35:41,443 INFO L226 Difference]: Without dead ends: 69 [2020-09-17 02:35:41,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:35:41,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-17 02:35:41,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-17 02:35:41,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-17 02:35:41,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-17 02:35:41,446 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-17 02:35:41,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:41,446 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-17 02:35:41,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:41,447 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-17 02:35:41,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:41,447 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:41,447 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:41,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-17 02:35:41,656 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:41,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:41,657 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-17 02:35:41,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:41,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39074689] [2020-09-17 02:35:41,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:41,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:41,787 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:41,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39074689] [2020-09-17 02:35:41,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563808126] [2020-09-17 02:35:41,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:41,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:41,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:41,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:41,852 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:41,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:41,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:35:41,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237432642] [2020-09-17 02:35:41,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:41,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:41,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:41,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:41,854 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-17 02:35:42,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:42,050 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-17 02:35:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:35:42,051 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:35:42,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:42,052 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:35:42,052 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:35:42,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:35:42,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:35:42,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-17 02:35:42,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:35:42,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:35:42,055 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-17 02:35:42,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:42,055 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:35:42,056 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:42,056 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:35:42,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:42,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:42,056 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:42,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-17 02:35:42,264 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:42,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:42,265 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-17 02:35:42,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:42,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193495054] [2020-09-17 02:35:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:42,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:42,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193495054] [2020-09-17 02:35:42,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70903920] [2020-09-17 02:35:42,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:42,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:42,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:42,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:42,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:42,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:42,470 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:42,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:42,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:35:42,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571620255] [2020-09-17 02:35:42,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:42,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:42,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:42,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:42,472 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-17 02:35:42,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:42,794 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-17 02:35:42,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:35:42,795 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:35:42,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:42,796 INFO L225 Difference]: With dead ends: 81 [2020-09-17 02:35:42,796 INFO L226 Difference]: Without dead ends: 75 [2020-09-17 02:35:42,796 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:35:42,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-17 02:35:42,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-17 02:35:42,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:35:42,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:35:42,799 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-17 02:35:42,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:42,799 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:35:42,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:42,799 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:35:42,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:42,800 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:42,800 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:43,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-17 02:35:43,008 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:43,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:43,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-17 02:35:43,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:43,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134255903] [2020-09-17 02:35:43,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:43,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:43,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134255903] [2020-09-17 02:35:43,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865774228] [2020-09-17 02:35:43,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:43,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:35:43,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:43,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:43,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:43,236 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:43,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:43,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:35:43,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001286713] [2020-09-17 02:35:43,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:43,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:43,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:43,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:43,238 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-17 02:35:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:43,549 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-17 02:35:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:35:43,550 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:35:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:43,551 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:35:43,551 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 02:35:43,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:35:43,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 02:35:43,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-17 02:35:43,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:35:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:35:43,554 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-17 02:35:43,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:43,554 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:35:43,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:43,554 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:35:43,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:43,555 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:43,555 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:43,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-17 02:35:43,764 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:43,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:43,765 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-17 02:35:43,765 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:43,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987688676] [2020-09-17 02:35:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:43,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:43,900 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:43,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987688676] [2020-09-17 02:35:43,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981558734] [2020-09-17 02:35:43,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:43,960 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:43,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:43,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:43,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:43,982 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:43,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:43,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:35:43,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691889476] [2020-09-17 02:35:43,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:43,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:43,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:43,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:43,996 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-17 02:35:44,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:44,389 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-17 02:35:44,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:35:44,390 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:35:44,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:44,391 INFO L225 Difference]: With dead ends: 77 [2020-09-17 02:35:44,391 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:35:44,392 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:35:44,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:35:44,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-17 02:35:44,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:35:44,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:35:44,394 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-17 02:35:44,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:44,394 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:35:44,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:35:44,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:44,395 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:44,395 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:44,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-17 02:35:44,598 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:44,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:44,599 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-17 02:35:44,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:44,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516928601] [2020-09-17 02:35:44,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:44,718 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:44,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516928601] [2020-09-17 02:35:44,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945035810] [2020-09-17 02:35:44,720 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:44,777 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-17 02:35:44,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:44,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:44,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:44,800 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:44,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:44,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:35:44,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294656767] [2020-09-17 02:35:44,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:44,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:44,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:44,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:44,802 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-17 02:35:45,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:45,154 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-17 02:35:45,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:35:45,155 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:35:45,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:45,156 INFO L225 Difference]: With dead ends: 74 [2020-09-17 02:35:45,156 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 02:35:45,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:35:45,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 02:35:45,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-17 02:35:45,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:35:45,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:35:45,160 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-17 02:35:45,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:45,161 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:35:45,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:45,161 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:35:45,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:45,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:45,161 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:45,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:45,370 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:45,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:45,371 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-17 02:35:45,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:45,372 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584214949] [2020-09-17 02:35:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:45,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:45,500 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:45,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584214949] [2020-09-17 02:35:45,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914859078] [2020-09-17 02:35:45,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:45,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-17 02:35:45,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:45,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:45,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:45,591 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:45,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:45,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:35:45,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024906077] [2020-09-17 02:35:45,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:45,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:45,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:45,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:45,606 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-17 02:35:46,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:46,090 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-17 02:35:46,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:35:46,094 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:35:46,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:46,095 INFO L225 Difference]: With dead ends: 73 [2020-09-17 02:35:46,096 INFO L226 Difference]: Without dead ends: 67 [2020-09-17 02:35:46,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:35:46,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-17 02:35:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-17 02:35:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:35:46,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:35:46,099 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-17 02:35:46,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:46,099 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:35:46,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:35:46,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:46,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:46,100 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:46,311 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-17 02:35:46,311 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:46,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:46,312 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-17 02:35:46,312 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:46,313 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513029806] [2020-09-17 02:35:46,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:46,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:46,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513029806] [2020-09-17 02:35:46,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1137454865] [2020-09-17 02:35:46,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:46,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:46,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:46,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:46,506 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:46,507 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:46,507 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-17 02:35:46,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573057977] [2020-09-17 02:35:46,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-17 02:35:46,508 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:46,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-17 02:35:46,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-17 02:35:46,508 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-17 02:35:46,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:46,918 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-17 02:35:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:35:46,919 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-17 02:35:46,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:46,919 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:35:46,920 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:35:46,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:35:46,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:35:46,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-17 02:35:46,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 02:35:46,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-17 02:35:46,924 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-17 02:35:46,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:46,924 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-17 02:35:46,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-17 02:35:46,924 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-17 02:35:46,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:46,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:46,925 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:47,136 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:47,136 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:47,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:47,137 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-17 02:35:47,137 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:47,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542081157] [2020-09-17 02:35:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:47,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:47,233 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:47,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542081157] [2020-09-17 02:35:47,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685500859] [2020-09-17 02:35:47,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:47,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:47,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:47,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:47,287 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:47,317 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:47,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:47,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:35:47,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326368326] [2020-09-17 02:35:47,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:47,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:47,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:47,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:47,318 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-17 02:35:47,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:47,738 INFO L93 Difference]: Finished difference Result 68 states and 165 transitions. [2020-09-17 02:35:47,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:35:47,739 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:35:47,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:47,739 INFO L225 Difference]: With dead ends: 68 [2020-09-17 02:35:47,740 INFO L226 Difference]: Without dead ends: 60 [2020-09-17 02:35:47,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=224, Invalid=532, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:35:47,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-17 02:35:47,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 45. [2020-09-17 02:35:47,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-17 02:35:47,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-17 02:35:47,743 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-17 02:35:47,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:47,743 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-17 02:35:47,743 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-17 02:35:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-17 02:35:47,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:47,744 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:47,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-17 02:35:47,952 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:47,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:47,953 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-17 02:35:47,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:47,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360918411] [2020-09-17 02:35:47,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:47,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:48,069 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:48,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360918411] [2020-09-17 02:35:48,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231668698] [2020-09-17 02:35:48,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:48,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-17 02:35:48,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:48,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-17 02:35:48,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:48,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:48,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:48,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-17 02:35:48,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361410635] [2020-09-17 02:35:48,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:48,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:48,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:48,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:48,159 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-17 02:35:48,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:48,632 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-17 02:35:48,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:35:48,632 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-17 02:35:48,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:48,633 INFO L225 Difference]: With dead ends: 76 [2020-09-17 02:35:48,633 INFO L226 Difference]: Without dead ends: 71 [2020-09-17 02:35:48,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:35:48,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-17 02:35:48,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-17 02:35:48,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:35:48,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-17 02:35:48,637 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-17 02:35:48,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:48,637 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-17 02:35:48,637 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:48,637 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-17 02:35:48,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:48,638 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:48,638 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:48,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:48,839 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:48,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:48,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-17 02:35:48,840 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:48,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529055014] [2020-09-17 02:35:48,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:48,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:48,967 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:48,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529055014] [2020-09-17 02:35:48,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599873631] [2020-09-17 02:35:48,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:49,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:49,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:49,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:49,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:49,063 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:35:49,078 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:49,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:49,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:35:49,079 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778264323] [2020-09-17 02:35:49,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:35:49,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:49,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:35:49,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:35:49,080 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-17 02:35:49,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:49,596 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-17 02:35:49,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:35:49,597 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:35:49,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:49,598 INFO L225 Difference]: With dead ends: 66 [2020-09-17 02:35:49,598 INFO L226 Difference]: Without dead ends: 61 [2020-09-17 02:35:49,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:35:49,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-17 02:35:49,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-17 02:35:49,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-17 02:35:49,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-17 02:35:49,602 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-17 02:35:49,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:49,603 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-17 02:35:49,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:35:49,603 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-17 02:35:49,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:49,603 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:49,603 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:49,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-17 02:35:49,811 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:49,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:49,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-17 02:35:49,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:49,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274593819] [2020-09-17 02:35:49,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:49,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:49,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274593819] [2020-09-17 02:35:49,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237469756] [2020-09-17 02:35:49,963 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:50,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:35:50,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:50,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:50,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:50,040 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:50,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:50,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:35:50,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549785276] [2020-09-17 02:35:50,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:50,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:50,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:50,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:50,042 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-17 02:35:50,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:50,255 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-17 02:35:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-17 02:35:50,255 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:35:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:50,256 INFO L225 Difference]: With dead ends: 72 [2020-09-17 02:35:50,256 INFO L226 Difference]: Without dead ends: 66 [2020-09-17 02:35:50,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:35:50,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-17 02:35:50,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-17 02:35:50,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:35:50,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-17 02:35:50,261 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-17 02:35:50,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:50,261 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-17 02:35:50,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:50,261 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-17 02:35:50,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:50,262 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:50,262 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:50,470 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-17 02:35:50,470 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:50,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:50,471 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-17 02:35:50,471 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:50,472 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1931124547] [2020-09-17 02:35:50,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:50,618 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:50,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1931124547] [2020-09-17 02:35:50,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021523997] [2020-09-17 02:35:50,619 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:50,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:35:50,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:50,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:50,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:50,707 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:50,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:50,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:35:50,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207532565] [2020-09-17 02:35:50,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:35:50,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:50,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:35:50,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:35:50,735 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-17 02:35:50,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:50,991 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-17 02:35:50,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-17 02:35:50,992 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:35:50,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:50,992 INFO L225 Difference]: With dead ends: 82 [2020-09-17 02:35:50,993 INFO L226 Difference]: Without dead ends: 76 [2020-09-17 02:35:50,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:35:50,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-17 02:35:50,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-17 02:35:50,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-17 02:35:50,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-17 02:35:50,996 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-17 02:35:50,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:50,996 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-17 02:35:50,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:35:50,997 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-17 02:35:50,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:50,997 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:50,997 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:51,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-17 02:35:51,205 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:51,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:51,206 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-17 02:35:51,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:51,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411201356] [2020-09-17 02:35:51,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:51,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:51,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411201356] [2020-09-17 02:35:51,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671930484] [2020-09-17 02:35:51,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:51,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:51,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:51,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:51,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:51,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:35:51,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944890720] [2020-09-17 02:35:51,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:51,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:51,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:51,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:51,442 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-17 02:35:51,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:51,756 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-17 02:35:51,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:35:51,757 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:35:51,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:51,758 INFO L225 Difference]: With dead ends: 83 [2020-09-17 02:35:51,758 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:35:51,758 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:35:51,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:35:51,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-17 02:35:51,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-17 02:35:51,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-17 02:35:51,760 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-17 02:35:51,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:51,760 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-17 02:35:51,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-17 02:35:51,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:51,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:51,761 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:51,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-17 02:35:51,962 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:51,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:51,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-17 02:35:51,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:51,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684354565] [2020-09-17 02:35:51,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:51,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:52,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684354565] [2020-09-17 02:35:52,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252303419] [2020-09-17 02:35:52,105 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:52,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:52,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:52,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:52,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:52,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:52,202 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:52,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:52,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:35:52,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372637616] [2020-09-17 02:35:52,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:35:52,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:52,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:35:52,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:35:52,204 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-17 02:35:52,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:52,573 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-17 02:35:52,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:35:52,578 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:35:52,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:52,578 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:35:52,578 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:35:52,579 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:35:52,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:35:52,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-17 02:35:52,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:35:52,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-17 02:35:52,581 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-17 02:35:52,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:52,581 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-17 02:35:52,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:35:52,582 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-17 02:35:52,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:52,582 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:52,582 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:52,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:52,790 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:52,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:52,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-17 02:35:52,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:52,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566458862] [2020-09-17 02:35:52,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:52,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566458862] [2020-09-17 02:35:52,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1212811948] [2020-09-17 02:35:52,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:52,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 02:35:52,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:52,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:52,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:53,014 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:53,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:53,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:35:53,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247489104] [2020-09-17 02:35:53,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:53,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:53,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:53,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:53,016 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-17 02:35:53,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:53,405 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-17 02:35:53,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:35:53,406 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:35:53,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:53,407 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:35:53,407 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:35:53,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:35:53,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:35:53,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-17 02:35:53,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:35:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-17 02:35:53,411 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-17 02:35:53,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:53,411 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-17 02:35:53,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-17 02:35:53,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:53,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:53,412 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:53,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:53,621 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:53,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:53,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-17 02:35:53,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:53,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497480361] [2020-09-17 02:35:53,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:53,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:53,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497480361] [2020-09-17 02:35:53,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116229788] [2020-09-17 02:35:53,749 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:53,794 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:53,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:53,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:53,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:53,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:53,832 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:53,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:53,833 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:35:53,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415566552] [2020-09-17 02:35:53,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:35:53,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:53,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:35:53,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:35:53,834 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-17 02:35:54,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:54,296 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-17 02:35:54,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:35:54,297 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:35:54,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:54,297 INFO L225 Difference]: With dead ends: 86 [2020-09-17 02:35:54,298 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 02:35:54,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:35:54,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 02:35:54,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-17 02:35:54,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:35:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-17 02:35:54,302 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-17 02:35:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:54,302 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-17 02:35:54,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:35:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-17 02:35:54,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:54,303 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:54,303 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:54,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-17 02:35:54,504 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:54,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:54,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-17 02:35:54,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:54,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610760667] [2020-09-17 02:35:54,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:54,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:54,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610760667] [2020-09-17 02:35:54,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126493866] [2020-09-17 02:35:54,632 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:54,682 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:35:54,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:54,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:54,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:54,700 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:54,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:54,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:35:54,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762614387] [2020-09-17 02:35:54,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:54,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:54,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:54,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:54,703 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-17 02:35:55,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:55,102 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-17 02:35:55,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:35:55,103 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:35:55,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:55,104 INFO L225 Difference]: With dead ends: 87 [2020-09-17 02:35:55,104 INFO L226 Difference]: Without dead ends: 81 [2020-09-17 02:35:55,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:35:55,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-17 02:35:55,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-17 02:35:55,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-17 02:35:55,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-17 02:35:55,107 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-17 02:35:55,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:55,107 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-17 02:35:55,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:55,108 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-17 02:35:55,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:55,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:55,108 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:55,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:35:55,317 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:55,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:55,318 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-17 02:35:55,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:55,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099117269] [2020-09-17 02:35:55,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:55,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:55,439 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:55,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099117269] [2020-09-17 02:35:55,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044592408] [2020-09-17 02:35:55,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:55,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:35:55,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:55,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:55,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:55,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:55,533 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:55,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:55,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:35:55,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602472505] [2020-09-17 02:35:55,534 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:35:55,534 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:55,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:35:55,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:35:55,535 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-17 02:35:56,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:56,072 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-17 02:35:56,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:35:56,073 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:35:56,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:56,074 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:35:56,074 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:35:56,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:35:56,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:35:56,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-17 02:35:56,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:35:56,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-17 02:35:56,077 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-17 02:35:56,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:56,077 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-17 02:35:56,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:35:56,077 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-17 02:35:56,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:56,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:56,077 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:56,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-17 02:35:56,278 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:56,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:56,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-17 02:35:56,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:56,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362273970] [2020-09-17 02:35:56,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:56,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:56,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362273970] [2020-09-17 02:35:56,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1487708881] [2020-09-17 02:35:56,399 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:56,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:56,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:56,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:56,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:56,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:56,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-17 02:35:56,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641607272] [2020-09-17 02:35:56,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-17 02:35:56,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:56,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-17 02:35:56,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-17 02:35:56,476 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-17 02:35:56,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:56,944 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-17 02:35:56,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:35:56,945 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-17 02:35:56,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:56,946 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:35:56,946 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:35:56,947 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:35:56,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:35:56,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-17 02:35:56,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:35:56,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-17 02:35:56,949 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-17 02:35:56,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:56,949 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-17 02:35:56,949 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-17 02:35:56,949 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-17 02:35:56,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-17 02:35:56,950 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:56,950 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:57,150 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-17 02:35:57,151 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:57,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:57,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-17 02:35:57,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:57,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199887529] [2020-09-17 02:35:57,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:57,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:57,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199887529] [2020-09-17 02:35:57,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385897746] [2020-09-17 02:35:57,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:57,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:35:57,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:57,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-17 02:35:57,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:57,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:57,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:57,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:57,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-17 02:35:57,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664322137] [2020-09-17 02:35:57,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:35:57,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:57,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:35:57,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:35:57,370 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-17 02:35:57,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:57,919 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-17 02:35:57,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:35:57,920 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-17 02:35:57,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:57,921 INFO L225 Difference]: With dead ends: 85 [2020-09-17 02:35:57,921 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:35:57,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:35:57,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:35:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-17 02:35:57,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 02:35:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-17 02:35:57,926 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-17 02:35:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:57,927 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-17 02:35:57,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:35:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-17 02:35:57,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:35:57,928 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:57,928 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:58,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-17 02:35:58,140 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:58,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:58,141 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-17 02:35:58,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:58,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981448303] [2020-09-17 02:35:58,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:58,326 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:58,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981448303] [2020-09-17 02:35:58,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423444764] [2020-09-17 02:35:58,327 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:58,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 02:35:58,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:58,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:35:58,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:58,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:58,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:58,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:35:58,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760702403] [2020-09-17 02:35:58,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:35:58,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:58,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:35:58,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:35:58,427 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-17 02:35:58,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:58,697 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-17 02:35:58,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:35:58,697 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:35:58,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:58,698 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:35:58,698 INFO L226 Difference]: Without dead ends: 88 [2020-09-17 02:35:58,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:35:58,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-17 02:35:58,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-17 02:35:58,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:35:58,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:35:58,701 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:35:58,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:58,702 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:35:58,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:35:58,702 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:35:58,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:35:58,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:58,703 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:58,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-17 02:35:58,911 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:58,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:58,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-17 02:35:58,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:58,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793879298] [2020-09-17 02:35:58,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:59,100 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:59,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793879298] [2020-09-17 02:35:59,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157234582] [2020-09-17 02:35:59,101 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:35:59,157 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:35:59,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:35:59,158 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:35:59,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:35:59,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:35:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:59,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:35:59,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:35:59,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415299038] [2020-09-17 02:35:59,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:35:59,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:35:59,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:35:59,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:35:59,194 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:35:59,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:35:59,587 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-17 02:35:59,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:35:59,588 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:35:59,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:35:59,589 INFO L225 Difference]: With dead ends: 91 [2020-09-17 02:35:59,589 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:35:59,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:35:59,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:35:59,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-17 02:35:59,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:35:59,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:35:59,593 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:35:59,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:35:59,593 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:35:59,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:35:59,593 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:35:59,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:35:59,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:35:59,594 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:35:59,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-17 02:35:59,803 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:35:59,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:35:59,804 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-17 02:35:59,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:35:59,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135667790] [2020-09-17 02:35:59,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:35:59,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:35:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:35:59,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135667790] [2020-09-17 02:35:59,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294424822] [2020-09-17 02:35:59,967 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:00,023 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:36:00,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:00,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:00,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:00,039 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:00,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:00,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:36:00,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293209671] [2020-09-17 02:36:00,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:36:00,040 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:00,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:36:00,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:36:00,040 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:36:00,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:00,340 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-17 02:36:00,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:36:00,341 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:36:00,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:00,342 INFO L225 Difference]: With dead ends: 88 [2020-09-17 02:36:00,342 INFO L226 Difference]: Without dead ends: 82 [2020-09-17 02:36:00,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:36:00,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-17 02:36:00,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-17 02:36:00,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:36:00,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:36:00,345 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:36:00,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:00,345 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:36:00,345 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:36:00,346 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:36:00,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:00,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:00,346 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:00,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:00,556 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:00,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:00,557 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-17 02:36:00,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:00,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236105156] [2020-09-17 02:36:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:00,722 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:00,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236105156] [2020-09-17 02:36:00,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1145026675] [2020-09-17 02:36:00,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:00,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:36:00,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:00,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:00,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:00,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:00,816 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:00,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:00,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:36:00,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113330560] [2020-09-17 02:36:00,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:00,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:00,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:00,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:00,817 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:36:01,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:01,280 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-17 02:36:01,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:36:01,281 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:36:01,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:01,282 INFO L225 Difference]: With dead ends: 87 [2020-09-17 02:36:01,282 INFO L226 Difference]: Without dead ends: 81 [2020-09-17 02:36:01,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:36:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-17 02:36:01,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-17 02:36:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:36:01,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:36:01,286 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:36:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:01,286 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:36:01,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:01,286 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:36:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:01,286 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:01,287 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:01,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:01,487 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:01,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:01,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-17 02:36:01,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:01,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907964659] [2020-09-17 02:36:01,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:01,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:01,620 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:01,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907964659] [2020-09-17 02:36:01,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268046267] [2020-09-17 02:36:01,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:01,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:01,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:01,702 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:01,703 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:01,703 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:36:01,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124868397] [2020-09-17 02:36:01,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:36:01,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:01,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:36:01,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:36:01,704 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:36:02,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:02,099 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-17 02:36:02,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:36:02,099 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:36:02,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:02,100 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:36:02,101 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:36:02,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:36:02,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:36:02,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-17 02:36:02,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:36:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:36:02,103 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:36:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:02,103 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:36:02,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:36:02,104 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:36:02,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:02,107 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:02,107 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:02,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-17 02:36:02,312 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:02,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:02,313 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-17 02:36:02,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:02,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534856340] [2020-09-17 02:36:02,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:02,472 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:02,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534856340] [2020-09-17 02:36:02,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509364546] [2020-09-17 02:36:02,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:02,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:02,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:02,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:02,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:02,552 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:02,567 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:02,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:02,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:36:02,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473864743] [2020-09-17 02:36:02,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:02,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:02,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:02,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:02,569 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:36:03,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:03,105 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-17 02:36:03,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:36:03,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:36:03,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:03,107 INFO L225 Difference]: With dead ends: 83 [2020-09-17 02:36:03,107 INFO L226 Difference]: Without dead ends: 77 [2020-09-17 02:36:03,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:36:03,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-17 02:36:03,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-17 02:36:03,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:36:03,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:36:03,112 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:36:03,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:03,113 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:36:03,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:03,113 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:36:03,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:03,114 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:03,114 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:03,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:03,324 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:03,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:03,325 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-17 02:36:03,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:03,325 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511226604] [2020-09-17 02:36:03,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:03,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:03,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:03,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511226604] [2020-09-17 02:36:03,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147294379] [2020-09-17 02:36:03,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:03,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-17 02:36:03,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:03,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:03,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:03,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:03,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:36:03,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841835075] [2020-09-17 02:36:03,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:36:03,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:03,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:36:03,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:36:03,571 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:36:04,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:04,044 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-17 02:36:04,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:36:04,045 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:36:04,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:04,046 INFO L225 Difference]: With dead ends: 80 [2020-09-17 02:36:04,046 INFO L226 Difference]: Without dead ends: 74 [2020-09-17 02:36:04,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:36:04,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-17 02:36:04,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-17 02:36:04,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:36:04,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:36:04,049 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-17 02:36:04,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:04,049 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:36:04,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:36:04,049 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:36:04,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:04,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:04,050 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:04,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-17 02:36:04,258 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:04,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:04,259 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-17 02:36:04,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:04,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383359655] [2020-09-17 02:36:04,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:04,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:04,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383359655] [2020-09-17 02:36:04,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680489905] [2020-09-17 02:36:04,408 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:04,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:04,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:04,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:04,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:04,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:04,506 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:04,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:04,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:36:04,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574143069] [2020-09-17 02:36:04,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:04,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:04,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:04,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:04,508 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-17 02:36:05,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:05,145 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-17 02:36:05,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:36:05,146 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:36:05,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:05,147 INFO L225 Difference]: With dead ends: 79 [2020-09-17 02:36:05,147 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:36:05,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:36:05,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:36:05,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-17 02:36:05,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:36:05,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:36:05,150 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-17 02:36:05,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:05,150 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:36:05,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:05,151 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:36:05,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:05,151 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:05,151 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:05,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:05,359 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:05,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:05,360 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-17 02:36:05,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:05,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708579289] [2020-09-17 02:36:05,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:05,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:05,479 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:05,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708579289] [2020-09-17 02:36:05,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91087528] [2020-09-17 02:36:05,480 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:05,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-17 02:36:05,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:05,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:05,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:05,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:05,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-17 02:36:05,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819436030] [2020-09-17 02:36:05,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-17 02:36:05,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:05,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-17 02:36:05,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-17 02:36:05,561 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-17 02:36:06,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:06,081 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-17 02:36:06,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:06,082 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-17 02:36:06,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:06,083 INFO L225 Difference]: With dead ends: 95 [2020-09-17 02:36:06,083 INFO L226 Difference]: Without dead ends: 89 [2020-09-17 02:36:06,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:36:06,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-17 02:36:06,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-17 02:36:06,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:36:06,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-17 02:36:06,085 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-17 02:36:06,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:06,086 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-17 02:36:06,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-17 02:36:06,086 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-17 02:36:06,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:06,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:06,086 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:06,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-17 02:36:06,287 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:06,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:06,288 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-17 02:36:06,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:06,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674678263] [2020-09-17 02:36:06,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:06,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:06,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674678263] [2020-09-17 02:36:06,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089357325] [2020-09-17 02:36:06,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:06,488 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-17 02:36:06,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:06,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:06,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:06,510 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:06,528 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:06,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:06,529 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:36:06,529 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349679761] [2020-09-17 02:36:06,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:06,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:06,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:06,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:06,529 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-17 02:36:07,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:07,216 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-17 02:36:07,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:36:07,217 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:36:07,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:07,218 INFO L225 Difference]: With dead ends: 76 [2020-09-17 02:36:07,218 INFO L226 Difference]: Without dead ends: 68 [2020-09-17 02:36:07,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:36:07,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-17 02:36:07,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-17 02:36:07,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-17 02:36:07,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-17 02:36:07,220 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-17 02:36:07,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:07,221 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-17 02:36:07,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:07,221 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-17 02:36:07,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-17 02:36:07,221 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:07,222 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:07,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:07,430 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:07,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:07,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-17 02:36:07,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:07,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043647512] [2020-09-17 02:36:07,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:07,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:07,573 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:07,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043647512] [2020-09-17 02:36:07,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891395370] [2020-09-17 02:36:07,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:07,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-17 02:36:07,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:07,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:36:07,669 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:07,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:07,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-17 02:36:07,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667452993] [2020-09-17 02:36:07,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:07,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:07,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:07,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:07,671 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-17 02:36:08,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:08,297 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-17 02:36:08,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:08,297 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-17 02:36:08,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:08,298 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:36:08,299 INFO L226 Difference]: Without dead ends: 79 [2020-09-17 02:36:08,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:36:08,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-17 02:36:08,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-17 02:36:08,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:36:08,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-17 02:36:08,302 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-17 02:36:08,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:08,302 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-17 02:36:08,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:08,302 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-17 02:36:08,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:08,302 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:08,303 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:08,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-17 02:36:08,504 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:08,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:08,505 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-17 02:36:08,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:08,505 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226392604] [2020-09-17 02:36:08,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:08,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:08,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226392604] [2020-09-17 02:36:08,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301876665] [2020-09-17 02:36:08,653 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:08,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:08,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:08,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:08,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:08,737 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:36:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:08,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:08,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:36:08,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788762372] [2020-09-17 02:36:08,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:08,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:08,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:08,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:08,758 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-17 02:36:09,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:09,452 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-17 02:36:09,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:09,453 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:36:09,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:09,454 INFO L225 Difference]: With dead ends: 72 [2020-09-17 02:36:09,454 INFO L226 Difference]: Without dead ends: 67 [2020-09-17 02:36:09,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:36:09,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-17 02:36:09,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-17 02:36:09,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-17 02:36:09,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-17 02:36:09,457 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-17 02:36:09,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:09,457 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-17 02:36:09,457 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:09,457 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-17 02:36:09,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:09,458 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:09,458 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:09,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-17 02:36:09,661 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:09,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:09,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-17 02:36:09,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:09,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896703612] [2020-09-17 02:36:09,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:09,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:09,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896703612] [2020-09-17 02:36:09,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541729496] [2020-09-17 02:36:09,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:09,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:36:09,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:09,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:09,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:09,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:09,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:36:09,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491271490] [2020-09-17 02:36:09,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:09,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:09,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:09,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:09,939 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-17 02:36:10,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:10,242 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-17 02:36:10,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-17 02:36:10,242 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:36:10,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:10,244 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:36:10,244 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 02:36:10,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:36:10,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 02:36:10,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-17 02:36:10,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:36:10,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-17 02:36:10,247 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-17 02:36:10,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:10,247 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-17 02:36:10,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:10,248 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-17 02:36:10,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:10,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:10,248 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:10,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:10,449 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:10,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:10,450 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-17 02:36:10,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:10,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262468139] [2020-09-17 02:36:10,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:10,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:10,659 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:10,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262468139] [2020-09-17 02:36:10,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370710396] [2020-09-17 02:36:10,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:10,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:10,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:10,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:10,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:10,744 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:10,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:10,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:36:10,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86534544] [2020-09-17 02:36:10,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:10,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:10,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:10,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:10,757 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-17 02:36:11,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:11,129 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-17 02:36:11,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-17 02:36:11,130 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:36:11,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:11,130 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:36:11,131 INFO L226 Difference]: Without dead ends: 84 [2020-09-17 02:36:11,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:36:11,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-17 02:36:11,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-17 02:36:11,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-17 02:36:11,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-17 02:36:11,133 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-17 02:36:11,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:11,134 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-17 02:36:11,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:11,134 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-17 02:36:11,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:11,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:11,134 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:11,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:11,343 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:11,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:11,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-17 02:36:11,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:11,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454415317] [2020-09-17 02:36:11,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:11,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:11,511 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:11,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454415317] [2020-09-17 02:36:11,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911688514] [2020-09-17 02:36:11,512 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:11,572 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:36:11,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:11,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:11,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:11,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:11,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:36:11,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101378067] [2020-09-17 02:36:11,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:11,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:11,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:11,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:11,588 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-17 02:36:12,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:12,000 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-17 02:36:12,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:36:12,001 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:36:12,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:12,002 INFO L225 Difference]: With dead ends: 91 [2020-09-17 02:36:12,002 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:36:12,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:36:12,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:36:12,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-17 02:36:12,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-17 02:36:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-17 02:36:12,004 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-17 02:36:12,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:12,004 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-17 02:36:12,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:12,005 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-17 02:36:12,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:12,005 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:12,005 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:12,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:12,212 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:12,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:12,213 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-17 02:36:12,213 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:12,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620942229] [2020-09-17 02:36:12,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:12,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620942229] [2020-09-17 02:36:12,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438273650] [2020-09-17 02:36:12,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:12,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:36:12,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:12,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:12,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:12,487 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:12,500 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:12,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:12,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:36:12,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473306656] [2020-09-17 02:36:12,502 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:12,502 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:12,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:12,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:12,502 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-17 02:36:12,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:12,963 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-17 02:36:12,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:36:12,964 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:36:12,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:12,965 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:36:12,966 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:36:12,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:36:12,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:36:12,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-17 02:36:12,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:36:12,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-17 02:36:12,969 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-17 02:36:12,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:12,970 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-17 02:36:12,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:12,970 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-17 02:36:12,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:12,970 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:12,971 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:13,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:13,180 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:13,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:13,181 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-17 02:36:13,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:13,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091060023] [2020-09-17 02:36:13,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:13,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091060023] [2020-09-17 02:36:13,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826707279] [2020-09-17 02:36:13,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:13,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:13,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:13,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:13,494 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:13,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:13,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:36:13,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764789673] [2020-09-17 02:36:13,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:13,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:13,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:13,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:13,496 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-17 02:36:13,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:13,939 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-17 02:36:13,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:36:13,940 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:36:13,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:13,941 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:36:13,941 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:36:13,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:36:13,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:36:13,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-17 02:36:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 02:36:13,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-17 02:36:13,944 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-17 02:36:13,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:13,944 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-17 02:36:13,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:13,945 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-17 02:36:13,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:13,945 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:13,945 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:14,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-17 02:36:14,148 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:14,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:14,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-17 02:36:14,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:14,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011685235] [2020-09-17 02:36:14,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:14,305 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:14,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011685235] [2020-09-17 02:36:14,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765116749] [2020-09-17 02:36:14,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:14,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:14,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:14,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:14,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:14,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:14,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:14,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:36:14,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002622045] [2020-09-17 02:36:14,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:14,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:14,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:14,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:14,398 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-17 02:36:14,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:14,952 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-17 02:36:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:36:14,953 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:36:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:14,954 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:36:14,955 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:36:14,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:36:14,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:36:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-17 02:36:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 02:36:14,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-17 02:36:14,957 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-17 02:36:14,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:14,957 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-17 02:36:14,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:14,958 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-17 02:36:14,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:14,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:14,958 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:15,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:15,159 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:15,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:15,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-17 02:36:15,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:15,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762852677] [2020-09-17 02:36:15,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:15,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762852677] [2020-09-17 02:36:15,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507885655] [2020-09-17 02:36:15,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:15,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:36:15,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:15,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:15,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:15,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:15,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:36:15,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129392086] [2020-09-17 02:36:15,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:15,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:15,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:15,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:15,373 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-17 02:36:15,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:15,893 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-17 02:36:15,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:15,894 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:36:15,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:15,895 INFO L225 Difference]: With dead ends: 97 [2020-09-17 02:36:15,895 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:36:15,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:36:15,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:36:15,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-17 02:36:15,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:36:15,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-17 02:36:15,899 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-17 02:36:15,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:15,900 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-17 02:36:15,900 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:15,900 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-17 02:36:15,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:15,900 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:15,901 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:16,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-17 02:36:16,109 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:16,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:16,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-17 02:36:16,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:16,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511003976] [2020-09-17 02:36:16,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:16,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:16,265 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:16,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511003976] [2020-09-17 02:36:16,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890871505] [2020-09-17 02:36:16,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:16,337 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:16,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:16,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:16,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:16,364 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:16,379 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:16,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:16,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:36:16,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142093718] [2020-09-17 02:36:16,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:16,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:16,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:16,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:16,381 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-17 02:36:16,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:16,972 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-17 02:36:16,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:36:16,973 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:36:16,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:16,974 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:36:16,974 INFO L226 Difference]: Without dead ends: 88 [2020-09-17 02:36:16,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:36:16,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-17 02:36:16,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-17 02:36:16,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:36:16,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-17 02:36:16,980 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-17 02:36:16,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:16,980 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-17 02:36:16,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:16,980 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-17 02:36:16,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:16,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:16,981 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:17,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:17,182 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:17,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:17,183 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-17 02:36:17,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:17,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535473344] [2020-09-17 02:36:17,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:17,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:17,368 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:17,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535473344] [2020-09-17 02:36:17,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870655460] [2020-09-17 02:36:17,369 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:17,460 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:36:17,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:17,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:17,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:17,486 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:17,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:17,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:36:17,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894177736] [2020-09-17 02:36:17,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:17,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:17,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:17,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:17,489 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-17 02:36:18,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:18,067 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-17 02:36:18,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:36:18,068 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:36:18,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:18,069 INFO L225 Difference]: With dead ends: 95 [2020-09-17 02:36:18,069 INFO L226 Difference]: Without dead ends: 89 [2020-09-17 02:36:18,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:36:18,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-17 02:36:18,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-17 02:36:18,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 02:36:18,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-17 02:36:18,072 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-17 02:36:18,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:18,072 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-17 02:36:18,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:18,072 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-17 02:36:18,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:18,073 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:18,073 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:18,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-17 02:36:18,273 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:18,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:18,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-17 02:36:18,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:18,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142450606] [2020-09-17 02:36:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:18,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:18,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142450606] [2020-09-17 02:36:18,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278947603] [2020-09-17 02:36:18,444 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:18,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:36:18,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:18,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:18,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:18,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:18,550 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:18,551 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:18,551 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:36:18,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707040778] [2020-09-17 02:36:18,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:18,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:18,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:18,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:18,552 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-17 02:36:19,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:19,254 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-17 02:36:19,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:36:19,254 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:36:19,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:19,255 INFO L225 Difference]: With dead ends: 92 [2020-09-17 02:36:19,255 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 02:36:19,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:36:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 02:36:19,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-17 02:36:19,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:36:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-17 02:36:19,257 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-17 02:36:19,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:19,258 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-17 02:36:19,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:19,258 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-17 02:36:19,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:19,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:19,258 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:19,459 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:19,459 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:19,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:19,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-17 02:36:19,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:19,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724282991] [2020-09-17 02:36:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:19,589 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:19,589 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724282991] [2020-09-17 02:36:19,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275809309] [2020-09-17 02:36:19,590 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:19,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-17 02:36:19,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:19,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:19,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-17 02:36:19,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349271090] [2020-09-17 02:36:19,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-17 02:36:19,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:19,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-17 02:36:19,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-17 02:36:19,679 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-17 02:36:20,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:20,274 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-17 02:36:20,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:36:20,275 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-17 02:36:20,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:20,276 INFO L225 Difference]: With dead ends: 112 [2020-09-17 02:36:20,276 INFO L226 Difference]: Without dead ends: 106 [2020-09-17 02:36:20,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:36:20,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-17 02:36:20,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-17 02:36:20,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:36:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-17 02:36:20,279 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-17 02:36:20,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:20,279 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-17 02:36:20,280 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-17 02:36:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-17 02:36:20,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-17 02:36:20,280 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:20,280 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:20,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:20,482 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:20,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:20,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-17 02:36:20,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:20,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313383184] [2020-09-17 02:36:20,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:20,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:20,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313383184] [2020-09-17 02:36:20,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428125483] [2020-09-17 02:36:20,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:20,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:20,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:20,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:20,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:20,734 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:20,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:20,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-17 02:36:20,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992412834] [2020-09-17 02:36:20,735 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:20,735 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:20,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:20,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:20,736 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-17 02:36:21,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:21,488 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-17 02:36:21,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:36:21,489 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-17 02:36:21,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:21,490 INFO L225 Difference]: With dead ends: 93 [2020-09-17 02:36:21,490 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:36:21,491 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=436, Invalid=1046, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:36:21,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:36:21,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-17 02:36:21,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 02:36:21,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-17 02:36:21,493 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-17 02:36:21,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:21,494 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-17 02:36:21,494 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:21,494 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-17 02:36:21,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:21,494 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:21,494 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:21,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:21,695 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:21,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:21,696 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-17 02:36:21,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:21,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941466681] [2020-09-17 02:36:21,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:21,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:21,922 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:21,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941466681] [2020-09-17 02:36:21,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145139295] [2020-09-17 02:36:21,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:21,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:36:21,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:21,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:21,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:22,008 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:22,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:22,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:36:22,008 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285525938] [2020-09-17 02:36:22,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:22,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:22,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:22,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:22,010 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-17 02:36:22,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:22,323 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-17 02:36:22,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:36:22,324 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:36:22,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:22,325 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:36:22,325 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:36:22,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:36:22,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:36:22,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-17 02:36:22,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:36:22,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:36:22,327 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:36:22,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:22,328 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:36:22,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:22,328 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:36:22,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:22,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:22,328 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:22,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:22,535 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:22,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:22,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-17 02:36:22,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:22,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514691035] [2020-09-17 02:36:22,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:22,747 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:22,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514691035] [2020-09-17 02:36:22,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195294497] [2020-09-17 02:36:22,748 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:22,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:22,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:22,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:22,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:22,829 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:22,843 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:22,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:22,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:36:22,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192344040] [2020-09-17 02:36:22,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:22,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:22,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:22,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:22,845 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:36:23,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:23,301 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-17 02:36:23,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:36:23,301 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:36:23,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:23,302 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:36:23,302 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:36:23,303 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:36:23,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:36:23,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-17 02:36:23,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:36:23,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:36:23,305 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:36:23,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:23,306 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:36:23,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:23,306 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:36:23,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:23,307 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:23,307 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:23,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:23,514 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:23,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:23,515 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-17 02:36:23,516 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:23,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063986979] [2020-09-17 02:36:23,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:23,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:23,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063986979] [2020-09-17 02:36:23,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799423553] [2020-09-17 02:36:23,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:23,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:36:23,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:23,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:23,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:23,808 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:23,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:23,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:36:23,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434997906] [2020-09-17 02:36:23,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:23,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:23,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:23,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:23,809 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:36:24,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:24,225 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-17 02:36:24,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:36:24,226 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:36:24,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:24,227 INFO L225 Difference]: With dead ends: 98 [2020-09-17 02:36:24,227 INFO L226 Difference]: Without dead ends: 92 [2020-09-17 02:36:24,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:36:24,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-17 02:36:24,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-17 02:36:24,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:36:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:36:24,229 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:36:24,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:24,230 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:36:24,230 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:24,230 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:36:24,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:24,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:24,230 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:24,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:24,439 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:24,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:24,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-17 02:36:24,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:24,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398477957] [2020-09-17 02:36:24,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:24,654 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:24,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398477957] [2020-09-17 02:36:24,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261418507] [2020-09-17 02:36:24,655 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:24,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:36:24,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:24,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:24,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:24,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:24,758 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:24,758 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:36:24,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333685993] [2020-09-17 02:36:24,759 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:24,759 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:24,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:24,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:24,760 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:36:25,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:25,315 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-17 02:36:25,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:36:25,316 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:36:25,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:25,317 INFO L225 Difference]: With dead ends: 97 [2020-09-17 02:36:25,317 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:36:25,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:36:25,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:36:25,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-17 02:36:25,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:36:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:36:25,320 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:36:25,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:25,320 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:36:25,320 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:25,321 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:36:25,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:25,321 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:25,321 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:25,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:25,522 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:25,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:25,523 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-17 02:36:25,523 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:25,523 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235586031] [2020-09-17 02:36:25,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:25,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235586031] [2020-09-17 02:36:25,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462303297] [2020-09-17 02:36:25,733 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:25,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:25,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:25,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:25,809 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:25,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:25,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:36:25,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713016465] [2020-09-17 02:36:25,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:25,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:25,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:25,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:25,810 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:36:26,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:26,285 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-17 02:36:26,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:36:26,285 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:36:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:26,286 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:36:26,287 INFO L226 Difference]: Without dead ends: 88 [2020-09-17 02:36:26,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:36:26,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-17 02:36:26,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-17 02:36:26,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:36:26,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:36:26,289 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:36:26,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:26,290 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:36:26,290 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:26,290 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:36:26,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:26,290 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:26,290 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:26,491 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-17 02:36:26,491 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:26,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:26,492 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-17 02:36:26,492 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:26,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54534672] [2020-09-17 02:36:26,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:26,698 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:26,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54534672] [2020-09-17 02:36:26,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [533486064] [2020-09-17 02:36:26,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:26,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:26,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:26,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:26,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:26,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:26,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:26,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:36:26,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488778682] [2020-09-17 02:36:26,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:26,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:26,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:26,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:26,795 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:36:27,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:27,429 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-17 02:36:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:36:27,430 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:36:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:27,431 INFO L225 Difference]: With dead ends: 93 [2020-09-17 02:36:27,431 INFO L226 Difference]: Without dead ends: 87 [2020-09-17 02:36:27,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:36:27,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-17 02:36:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-17 02:36:27,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:36:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:36:27,434 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:36:27,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:27,435 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:36:27,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:27,435 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:36:27,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:27,435 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:27,435 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:27,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:27,636 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:27,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:27,637 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-17 02:36:27,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:27,637 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234300558] [2020-09-17 02:36:27,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:27,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:27,819 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:27,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234300558] [2020-09-17 02:36:27,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808981976] [2020-09-17 02:36:27,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:27,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:36:27,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:27,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:27,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:27,898 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:27,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:27,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:36:27,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401923947] [2020-09-17 02:36:27,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:27,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:27,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:27,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:27,899 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:36:28,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:28,431 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-17 02:36:28,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:28,431 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:36:28,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:28,432 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:36:28,433 INFO L226 Difference]: Without dead ends: 84 [2020-09-17 02:36:28,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:36:28,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-17 02:36:28,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-17 02:36:28,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:36:28,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:36:28,436 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:36:28,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:28,436 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:36:28,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:28,436 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:36:28,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:28,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:28,437 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:28,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-17 02:36:28,638 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:28,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:28,638 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-17 02:36:28,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:28,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465409246] [2020-09-17 02:36:28,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:28,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465409246] [2020-09-17 02:36:28,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877976636] [2020-09-17 02:36:28,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:28,881 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:28,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:28,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:28,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:28,910 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:28,925 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:28,925 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:36:28,925 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628599604] [2020-09-17 02:36:28,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:28,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:28,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:28,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:28,926 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:36:29,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:29,666 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-17 02:36:29,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:36:29,667 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:36:29,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:29,668 INFO L225 Difference]: With dead ends: 89 [2020-09-17 02:36:29,668 INFO L226 Difference]: Without dead ends: 83 [2020-09-17 02:36:29,669 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:36:29,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-17 02:36:29,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-17 02:36:29,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:36:29,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:36:29,672 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:36:29,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:29,672 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:36:29,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:29,673 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:36:29,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:29,673 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:29,673 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:29,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:29,881 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:29,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:29,882 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-17 02:36:29,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:29,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517039083] [2020-09-17 02:36:29,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:30,056 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:30,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517039083] [2020-09-17 02:36:30,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257454172] [2020-09-17 02:36:30,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:30,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-17 02:36:30,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:30,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:30,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:30,142 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:30,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:30,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:36:30,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236358428] [2020-09-17 02:36:30,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:30,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:30,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:30,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:30,144 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:36:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:30,785 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-17 02:36:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:36:30,786 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:36:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:30,787 INFO L225 Difference]: With dead ends: 86 [2020-09-17 02:36:30,787 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 02:36:30,788 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:36:30,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 02:36:30,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-17 02:36:30,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:36:30,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:36:30,790 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-17 02:36:30,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:30,791 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:36:30,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:30,791 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:36:30,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:30,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:30,792 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:31,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:31,001 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:31,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:31,002 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-17 02:36:31,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:31,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568861124] [2020-09-17 02:36:31,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:31,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:31,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568861124] [2020-09-17 02:36:31,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [811642093] [2020-09-17 02:36:31,193 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:31,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-17 02:36:31,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:31,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:31,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:31,280 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:31,296 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:31,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:31,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:36:31,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848105514] [2020-09-17 02:36:31,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:31,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:31,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:31,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:31,298 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-17 02:36:32,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:32,155 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-17 02:36:32,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:36:32,156 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:36:32,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:32,157 INFO L225 Difference]: With dead ends: 85 [2020-09-17 02:36:32,157 INFO L226 Difference]: Without dead ends: 79 [2020-09-17 02:36:32,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:36:32,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-17 02:36:32,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-17 02:36:32,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:36:32,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:36:32,160 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-17 02:36:32,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:32,160 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:36:32,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:32,160 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:36:32,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:32,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:32,161 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:32,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:32,369 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:32,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:32,370 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-17 02:36:32,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:32,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343788925] [2020-09-17 02:36:32,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:32,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:32,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343788925] [2020-09-17 02:36:32,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200325019] [2020-09-17 02:36:32,555 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:32,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:32,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:32,639 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:32,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:32,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-17 02:36:32,640 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368355813] [2020-09-17 02:36:32,640 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-17 02:36:32,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:32,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-17 02:36:32,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-17 02:36:32,641 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-17 02:36:33,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:33,332 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-17 02:36:33,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:36:33,333 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-17 02:36:33,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:33,334 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:36:33,334 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:36:33,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:36:33,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:36:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-17 02:36:33,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:36:33,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-17 02:36:33,336 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-17 02:36:33,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:33,336 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-17 02:36:33,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-17 02:36:33,336 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-17 02:36:33,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:33,337 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:33,337 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:33,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:33,538 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:33,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:33,538 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-17 02:36:33,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:33,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451517567] [2020-09-17 02:36:33,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:33,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:33,699 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:33,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451517567] [2020-09-17 02:36:33,699 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [608222371] [2020-09-17 02:36:33,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:33,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:33,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:33,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:33,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:33,806 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:33,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:33,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:36:33,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604654459] [2020-09-17 02:36:33,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:33,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:33,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:33,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:33,808 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-17 02:36:34,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:34,612 INFO L93 Difference]: Finished difference Result 80 states and 197 transitions. [2020-09-17 02:36:34,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:36:34,613 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:36:34,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:34,614 INFO L225 Difference]: With dead ends: 80 [2020-09-17 02:36:34,614 INFO L226 Difference]: Without dead ends: 72 [2020-09-17 02:36:34,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=447, Invalid=1113, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:36:34,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-17 02:36:34,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 53. [2020-09-17 02:36:34,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-17 02:36:34,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-17 02:36:34,617 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-17 02:36:34,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:34,617 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-17 02:36:34,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:34,617 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-17 02:36:34,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-17 02:36:34,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:34,618 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:34,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:34,826 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:34,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:34,826 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-17 02:36:34,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:34,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499990486] [2020-09-17 02:36:34,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:34,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:34,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499990486] [2020-09-17 02:36:34,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982672493] [2020-09-17 02:36:34,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:35,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-17 02:36:35,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:35,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-17 02:36:35,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:35,084 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:36:35,101 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:35,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:35,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-17 02:36:35,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650838528] [2020-09-17 02:36:35,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:35,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:35,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:35,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:35,103 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-17 02:36:35,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:35,923 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-17 02:36:35,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:36:35,924 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-17 02:36:35,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:35,925 INFO L225 Difference]: With dead ends: 92 [2020-09-17 02:36:35,925 INFO L226 Difference]: Without dead ends: 87 [2020-09-17 02:36:35,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:36:35,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-17 02:36:35,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-17 02:36:35,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:36:35,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-17 02:36:35,927 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-17 02:36:35,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:35,928 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-17 02:36:35,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:35,928 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-17 02:36:35,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:35,928 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:35,928 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:36,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:36,129 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:36,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:36,130 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-17 02:36:36,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:36,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840747013] [2020-09-17 02:36:36,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:36,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:36,326 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:36,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840747013] [2020-09-17 02:36:36,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348882197] [2020-09-17 02:36:36,327 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:36,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:36,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:36,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:36,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:36,409 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:36:36,423 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:36,423 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:36,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:36,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5810489] [2020-09-17 02:36:36,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:36,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:36,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:36,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:36,424 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-17 02:36:37,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:37,302 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-17 02:36:37,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:36:37,303 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:36:37,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:37,304 INFO L225 Difference]: With dead ends: 78 [2020-09-17 02:36:37,304 INFO L226 Difference]: Without dead ends: 73 [2020-09-17 02:36:37,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:36:37,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-17 02:36:37,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-17 02:36:37,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-17 02:36:37,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-17 02:36:37,307 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-17 02:36:37,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:37,307 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-17 02:36:37,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:37,307 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-17 02:36:37,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:37,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:37,308 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:37,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-17 02:36:37,511 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:37,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:37,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-17 02:36:37,512 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:37,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243405688] [2020-09-17 02:36:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:37,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:37,765 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:37,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243405688] [2020-09-17 02:36:37,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964121641] [2020-09-17 02:36:37,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:37,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:36:37,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:37,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:37,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:37,843 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:37,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:37,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:36:37,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917207546] [2020-09-17 02:36:37,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:37,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:37,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:37,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:37,845 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-17 02:36:38,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:38,193 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-17 02:36:38,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-17 02:36:38,194 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:36:38,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:38,195 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:36:38,195 INFO L226 Difference]: Without dead ends: 78 [2020-09-17 02:36:38,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:36:38,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-17 02:36:38,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-17 02:36:38,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:36:38,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-17 02:36:38,197 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-17 02:36:38,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:38,197 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-17 02:36:38,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:38,198 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-17 02:36:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:38,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:38,198 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:38,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:38,399 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:38,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:38,399 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-17 02:36:38,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:38,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211482636] [2020-09-17 02:36:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:38,661 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:38,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211482636] [2020-09-17 02:36:38,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100480129] [2020-09-17 02:36:38,662 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:38,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:36:38,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:38,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:38,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:38,756 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:38,775 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:38,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:38,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:38,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576272432] [2020-09-17 02:36:38,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:38,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:38,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:38,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:38,777 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-17 02:36:39,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:39,229 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-17 02:36:39,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-17 02:36:39,230 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:36:39,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:39,231 INFO L225 Difference]: With dead ends: 98 [2020-09-17 02:36:39,231 INFO L226 Difference]: Without dead ends: 92 [2020-09-17 02:36:39,231 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-09-17 02:36:39,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-17 02:36:39,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-17 02:36:39,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-17 02:36:39,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-17 02:36:39,233 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-17 02:36:39,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:39,233 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-17 02:36:39,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:39,233 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-17 02:36:39,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:39,233 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:39,234 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:39,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-17 02:36:39,434 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:39,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:39,435 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-17 02:36:39,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:39,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738294818] [2020-09-17 02:36:39,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:39,685 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:39,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738294818] [2020-09-17 02:36:39,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225731629] [2020-09-17 02:36:39,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:39,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:39,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:39,759 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:39,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:39,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:36:39,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143587100] [2020-09-17 02:36:39,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:39,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:39,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:39,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:39,761 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-17 02:36:40,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:40,235 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-17 02:36:40,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:36:40,236 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:36:40,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:40,237 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:36:40,237 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:36:40,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:36:40,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:36:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-17 02:36:40,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-17 02:36:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-17 02:36:40,239 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-17 02:36:40,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:40,239 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-17 02:36:40,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:40,240 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-17 02:36:40,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:40,240 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:40,240 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:40,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:40,445 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:40,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:40,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-17 02:36:40,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:40,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705256467] [2020-09-17 02:36:40,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:40,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:40,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705256467] [2020-09-17 02:36:40,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1094290286] [2020-09-17 02:36:40,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:40,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:40,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:40,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:40,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:40,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:40,787 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:40,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:40,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:40,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550888907] [2020-09-17 02:36:40,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:40,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:40,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:40,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:40,789 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-17 02:36:41,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:41,310 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-17 02:36:41,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:36:41,314 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:36:41,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:41,315 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:36:41,315 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:36:41,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:36:41,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:36:41,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-17 02:36:41,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:36:41,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-17 02:36:41,319 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-17 02:36:41,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:41,319 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-17 02:36:41,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:41,319 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-17 02:36:41,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:41,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:41,320 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:41,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:41,532 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:41,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:41,533 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-17 02:36:41,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:41,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329246959] [2020-09-17 02:36:41,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:41,805 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:41,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329246959] [2020-09-17 02:36:41,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285775227] [2020-09-17 02:36:41,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:41,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:36:41,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:41,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:41,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:41,875 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:41,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:41,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:36:41,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850208327] [2020-09-17 02:36:41,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:41,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:41,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:41,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:41,877 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-17 02:36:42,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:42,406 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-17 02:36:42,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:42,406 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:36:42,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:42,408 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:36:42,408 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:36:42,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:36:42,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:36:42,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-17 02:36:42,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 02:36:42,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-17 02:36:42,411 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-17 02:36:42,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:42,411 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-17 02:36:42,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:42,411 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-17 02:36:42,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:42,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:42,412 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:42,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-17 02:36:42,617 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:42,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:42,618 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-17 02:36:42,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:42,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202692214] [2020-09-17 02:36:42,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:42,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:42,856 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:42,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202692214] [2020-09-17 02:36:42,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098125127] [2020-09-17 02:36:42,857 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:42,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:42,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:42,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:42,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:42,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:42,958 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:42,959 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:42,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:42,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663621706] [2020-09-17 02:36:42,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:42,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:42,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:42,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:42,960 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-17 02:36:43,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:43,615 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-17 02:36:43,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:36:43,616 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:36:43,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:43,618 INFO L225 Difference]: With dead ends: 106 [2020-09-17 02:36:43,618 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:36:43,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:36:43,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:36:43,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-17 02:36:43,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:36:43,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-17 02:36:43,621 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-17 02:36:43,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:43,621 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-17 02:36:43,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:43,621 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-17 02:36:43,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:43,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:43,622 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:43,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-17 02:36:43,823 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:43,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:43,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-17 02:36:43,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:43,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932001828] [2020-09-17 02:36:43,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:43,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:44,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:44,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932001828] [2020-09-17 02:36:44,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783199365] [2020-09-17 02:36:44,044 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:44,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:36:44,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:44,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:44,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:44,129 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:44,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:44,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:36:44,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576320087] [2020-09-17 02:36:44,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:44,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:44,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:44,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:44,130 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-17 02:36:44,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:44,749 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-17 02:36:44,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:36:44,750 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:36:44,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:44,750 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:36:44,751 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:36:44,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:36:44,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:36:44,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-17 02:36:44,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 02:36:44,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-17 02:36:44,754 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-17 02:36:44,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:44,754 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-17 02:36:44,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:44,754 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-17 02:36:44,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:44,755 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:44,755 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:44,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:44,964 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:44,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:44,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-17 02:36:44,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:44,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123870379] [2020-09-17 02:36:44,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:45,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123870379] [2020-09-17 02:36:45,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240376457] [2020-09-17 02:36:45,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:45,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:36:45,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:45,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:45,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:45,251 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:45,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:45,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:45,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029199099] [2020-09-17 02:36:45,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:45,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:45,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:45,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:45,268 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-17 02:36:46,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:46,009 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-17 02:36:46,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:36:46,010 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:36:46,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:46,010 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:36:46,011 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:36:46,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:36:46,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:36:46,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-17 02:36:46,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:36:46,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-17 02:36:46,014 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-17 02:36:46,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:46,014 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-17 02:36:46,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:46,014 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-17 02:36:46,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:46,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:46,015 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:46,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-17 02:36:46,218 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:46,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:46,219 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-17 02:36:46,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:46,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695685521] [2020-09-17 02:36:46,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:46,413 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:46,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695685521] [2020-09-17 02:36:46,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169532816] [2020-09-17 02:36:46,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:46,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:46,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:46,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:46,490 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:46,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:46,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:36:46,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761587512] [2020-09-17 02:36:46,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:46,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:46,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:46,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:46,491 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-17 02:36:47,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:47,164 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-17 02:36:47,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:36:47,165 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:36:47,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:47,166 INFO L225 Difference]: With dead ends: 105 [2020-09-17 02:36:47,166 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 02:36:47,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:36:47,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 02:36:47,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-17 02:36:47,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:36:47,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-17 02:36:47,169 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-17 02:36:47,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:47,170 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-17 02:36:47,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:47,170 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-17 02:36:47,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:47,170 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:47,170 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:47,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:47,379 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:47,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:47,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-17 02:36:47,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:47,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506951198] [2020-09-17 02:36:47,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:47,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:47,587 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:47,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506951198] [2020-09-17 02:36:47,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3562473] [2020-09-17 02:36:47,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:47,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:47,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:47,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:47,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:47,674 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:47,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:47,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:47,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570152919] [2020-09-17 02:36:47,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:47,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:47,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:47,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:47,691 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-17 02:36:48,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:48,528 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-17 02:36:48,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:36:48,529 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:36:48,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:48,529 INFO L225 Difference]: With dead ends: 102 [2020-09-17 02:36:48,530 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 02:36:48,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:36:48,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 02:36:48,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-17 02:36:48,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:36:48,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-17 02:36:48,532 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-17 02:36:48,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:48,532 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-17 02:36:48,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-17 02:36:48,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:48,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:48,533 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:48,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-17 02:36:48,734 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:48,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:48,734 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-17 02:36:48,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:48,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290981833] [2020-09-17 02:36:48,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:48,943 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:48,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290981833] [2020-09-17 02:36:48,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120577186] [2020-09-17 02:36:48,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:49,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:36:49,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:49,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:49,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:49,036 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:49,036 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:36:49,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487172767] [2020-09-17 02:36:49,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:49,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:49,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:49,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:49,038 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-17 02:36:49,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:49,766 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-17 02:36:49,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:36:49,767 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:36:49,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:49,768 INFO L225 Difference]: With dead ends: 103 [2020-09-17 02:36:49,768 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:36:49,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:36:49,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:36:49,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-17 02:36:49,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 02:36:49,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-17 02:36:49,772 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-17 02:36:49,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:49,772 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-17 02:36:49,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:49,772 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-17 02:36:49,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:49,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:49,773 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:49,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:49,976 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:49,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:49,977 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-17 02:36:49,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:49,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528081289] [2020-09-17 02:36:49,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:49,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:50,179 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:50,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528081289] [2020-09-17 02:36:50,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309443609] [2020-09-17 02:36:50,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:50,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:50,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:50,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:50,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:50,264 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:50,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:50,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:50,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390585323] [2020-09-17 02:36:50,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:50,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:50,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:50,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:50,280 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-17 02:36:51,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:51,198 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-17 02:36:51,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:36:51,198 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:36:51,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:51,199 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:36:51,199 INFO L226 Difference]: Without dead ends: 94 [2020-09-17 02:36:51,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:36:51,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-17 02:36:51,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-17 02:36:51,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:36:51,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-17 02:36:51,202 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-17 02:36:51,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:51,203 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-17 02:36:51,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:51,203 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-17 02:36:51,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:51,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:51,203 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:51,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-17 02:36:51,410 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:51,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:51,411 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-17 02:36:51,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:51,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923521148] [2020-09-17 02:36:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:51,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:51,614 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:51,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923521148] [2020-09-17 02:36:51,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768959850] [2020-09-17 02:36:51,615 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:51,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:36:51,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:51,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-17 02:36:51,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:51,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:51,722 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-17 02:36:51,722 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394028251] [2020-09-17 02:36:51,722 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-17 02:36:51,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:51,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-17 02:36:51,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-17 02:36:51,723 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-17 02:36:52,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:52,652 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-17 02:36:52,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:36:52,653 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-17 02:36:52,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:52,654 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:36:52,654 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:36:52,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:36:52,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:36:52,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-17 02:36:52,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:36:52,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-17 02:36:52,658 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-17 02:36:52,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:52,658 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-17 02:36:52,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-17 02:36:52,658 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-17 02:36:52,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-17 02:36:52,659 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:52,659 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:52,869 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-17 02:36:52,869 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:52,870 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-17 02:36:52,870 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:52,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905749713] [2020-09-17 02:36:52,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:52,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:53,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905749713] [2020-09-17 02:36:53,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361824091] [2020-09-17 02:36:53,055 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:53,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:36:53,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:53,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:36:53,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:53,149 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:53,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:53,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-17 02:36:53,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5719849] [2020-09-17 02:36:53,150 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:53,150 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:53,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:53,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:53,151 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-17 02:36:54,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:54,069 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-17 02:36:54,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:36:54,070 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-17 02:36:54,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:54,071 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:36:54,071 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:36:54,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:36:54,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:36:54,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-17 02:36:54,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 02:36:54,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-17 02:36:54,074 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-17 02:36:54,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:54,074 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-17 02:36:54,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:54,074 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-17 02:36:54,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:36:54,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:54,075 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:54,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:54,276 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:54,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:54,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-17 02:36:54,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:54,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488620895] [2020-09-17 02:36:54,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:54,518 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:54,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488620895] [2020-09-17 02:36:54,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [433243761] [2020-09-17 02:36:54,519 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:54,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:54,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:36:54,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:54,601 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:54,602 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:54,602 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:36:54,602 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539840938] [2020-09-17 02:36:54,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:54,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:54,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:54,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:54,603 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-17 02:36:55,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:55,071 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-17 02:36:55,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:36:55,072 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:36:55,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:55,073 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:36:55,073 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:36:55,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-17 02:36:55,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:36:55,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-17 02:36:55,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:36:55,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:36:55,076 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:36:55,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:55,076 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:36:55,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:55,076 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:36:55,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:36:55,077 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:55,077 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:55,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:55,281 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:55,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:55,281 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-17 02:36:55,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:55,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167059890] [2020-09-17 02:36:55,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:55,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:55,574 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:55,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167059890] [2020-09-17 02:36:55,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284955183] [2020-09-17 02:36:55,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:55,636 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:36:55,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:55,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:36:55,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:55,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:55,675 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:55,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:55,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:36:55,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405893016] [2020-09-17 02:36:55,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:36:55,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:55,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:36:55,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:36:55,676 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:36:56,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:56,255 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-17 02:36:56,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:36:56,256 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:36:56,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:56,257 INFO L225 Difference]: With dead ends: 111 [2020-09-17 02:36:56,257 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 02:36:56,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:36:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 02:36:56,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-17 02:36:56,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:36:56,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:36:56,259 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:36:56,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:56,259 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:36:56,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:36:56,259 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:36:56,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:36:56,259 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:56,260 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:56,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-17 02:36:56,460 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:56,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:56,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-17 02:36:56,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:56,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209828652] [2020-09-17 02:36:56,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:56,733 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:56,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209828652] [2020-09-17 02:36:56,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509570342] [2020-09-17 02:36:56,733 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:56,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:36:56,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:56,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:36:56,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:56,812 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:56,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:56,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:36:56,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312506995] [2020-09-17 02:36:56,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:56,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:56,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:56,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:56,813 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:36:57,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:57,346 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-17 02:36:57,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:36:57,347 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:36:57,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:57,347 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:36:57,347 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 02:36:57,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-09-17 02:36:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 02:36:57,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-17 02:36:57,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:36:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:36:57,349 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:36:57,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:57,349 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:36:57,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:57,350 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:36:57,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:36:57,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:57,350 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:57,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:36:57,555 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:57,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:57,556 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-17 02:36:57,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:57,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183763045] [2020-09-17 02:36:57,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:57,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:57,829 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:57,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183763045] [2020-09-17 02:36:57,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49502655] [2020-09-17 02:36:57,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:57,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:36:57,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:57,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:36:57,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:57,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:36:57,937 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:57,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:57,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:36:57,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789656130] [2020-09-17 02:36:57,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:36:57,938 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:57,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:36:57,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:36:57,939 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:36:58,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:58,587 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-17 02:36:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:36:58,588 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:36:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:58,589 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:36:58,589 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:36:58,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:36:58,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:36:58,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-17 02:36:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:36:58,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:36:58,592 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:36:58,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:58,592 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:36:58,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:36:58,592 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:36:58,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:36:58,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:58,593 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:58,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-17 02:36:58,801 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:58,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:58,802 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-17 02:36:58,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:58,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808721291] [2020-09-17 02:36:58,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:58,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:36:59,057 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:59,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808721291] [2020-09-17 02:36:59,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882401317] [2020-09-17 02:36:59,058 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:36:59,120 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:36:59,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:36:59,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:36:59,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:36:59,136 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:36:59,137 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:36:59,137 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:36:59,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368426790] [2020-09-17 02:36:59,138 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:36:59,138 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:36:59,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:36:59,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:36:59,138 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:36:59,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:36:59,747 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-17 02:36:59,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:36:59,748 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:36:59,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:36:59,749 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:36:59,749 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:36:59,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:36:59,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:36:59,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-17 02:36:59,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:36:59,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:36:59,753 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:36:59,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:36:59,753 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:36:59,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:36:59,753 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:36:59,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:36:59,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:36:59,754 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:36:59,963 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-17 02:36:59,963 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:36:59,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:36:59,964 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-17 02:36:59,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:36:59,964 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427393008] [2020-09-17 02:36:59,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:36:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:00,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427393008] [2020-09-17 02:37:00,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281414550] [2020-09-17 02:37:00,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:00,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:37:00,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:00,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:00,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:00,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:00,329 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:00,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:00,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:37:00,330 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665727996] [2020-09-17 02:37:00,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:00,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:00,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:00,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:00,331 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:37:01,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:01,096 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-17 02:37:01,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:37:01,097 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:37:01,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:01,098 INFO L225 Difference]: With dead ends: 103 [2020-09-17 02:37:01,098 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:37:01,098 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:37:01,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:37:01,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-17 02:37:01,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:37:01,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:37:01,101 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:37:01,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:01,102 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:37:01,102 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:01,102 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:37:01,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:01,102 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:01,102 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:01,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-17 02:37:01,306 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:01,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:01,307 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-17 02:37:01,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:01,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905785896] [2020-09-17 02:37:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:01,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:01,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905785896] [2020-09-17 02:37:01,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580363156] [2020-09-17 02:37:01,550 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:01,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:01,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:01,628 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:01,628 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:01,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:37:01,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303537452] [2020-09-17 02:37:01,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:37:01,629 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:01,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:37:01,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:37:01,630 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:37:02,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:02,321 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-17 02:37:02,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:37:02,322 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:37:02,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:02,323 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:37:02,323 INFO L226 Difference]: Without dead ends: 94 [2020-09-17 02:37:02,323 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:37:02,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-17 02:37:02,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-17 02:37:02,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:37:02,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:37:02,325 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:37:02,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:02,325 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:37:02,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:37:02,326 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:37:02,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:02,326 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:02,326 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:02,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:02,529 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:02,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:02,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-17 02:37:02,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:02,531 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655781844] [2020-09-17 02:37:02,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:02,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:02,746 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:02,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655781844] [2020-09-17 02:37:02,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908376270] [2020-09-17 02:37:02,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:02,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:02,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:02,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:02,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:02,837 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:02,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:02,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:37:02,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709329364] [2020-09-17 02:37:02,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:02,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:02,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:02,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:02,856 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:37:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:03,730 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-17 02:37:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:37:03,731 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:37:03,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:03,732 INFO L225 Difference]: With dead ends: 99 [2020-09-17 02:37:03,732 INFO L226 Difference]: Without dead ends: 93 [2020-09-17 02:37:03,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:37:03,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-17 02:37:03,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-17 02:37:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:37:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:37:03,735 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:37:03,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:03,735 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:37:03,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:37:03,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:03,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:03,736 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:03,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-17 02:37:03,937 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:03,937 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-17 02:37:03,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:03,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026513387] [2020-09-17 02:37:03,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:04,165 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:04,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026513387] [2020-09-17 02:37:04,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071868590] [2020-09-17 02:37:04,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:04,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:37:04,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:04,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:04,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:04,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:04,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:37:04,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366600451] [2020-09-17 02:37:04,248 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:37:04,248 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:04,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:37:04,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:37:04,249 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:37:04,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:04,992 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-17 02:37:04,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:37:04,993 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:37:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:04,994 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:37:04,994 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:37:04,995 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:37:04,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:37:04,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-17 02:37:04,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:37:04,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:37:04,997 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:37:04,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:04,997 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:37:04,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:37:04,997 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:37:04,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:04,998 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:04,998 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:05,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:05,200 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:05,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:05,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-17 02:37:05,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:05,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579101516] [2020-09-17 02:37:05,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:05,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:05,435 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:05,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579101516] [2020-09-17 02:37:05,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719416019] [2020-09-17 02:37:05,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:05,501 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:05,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:05,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:05,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:05,530 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:05,546 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:05,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:05,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:37:05,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304969364] [2020-09-17 02:37:05,547 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:05,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:05,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:05,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:05,548 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:37:06,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:06,534 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-17 02:37:06,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:37:06,534 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:37:06,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:06,535 INFO L225 Difference]: With dead ends: 95 [2020-09-17 02:37:06,535 INFO L226 Difference]: Without dead ends: 89 [2020-09-17 02:37:06,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:37:06,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-17 02:37:06,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-17 02:37:06,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:37:06,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:37:06,538 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:37:06,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:06,538 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:37:06,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:06,538 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:37:06,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:06,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:06,539 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:06,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:06,740 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:06,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:06,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-17 02:37:06,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:06,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831801226] [2020-09-17 02:37:06,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:06,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:06,941 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:06,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831801226] [2020-09-17 02:37:06,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799084074] [2020-09-17 02:37:06,942 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:07,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-17 02:37:07,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:07,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:07,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:07,051 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:07,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:37:07,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122365231] [2020-09-17 02:37:07,052 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:37:07,052 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:07,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:37:07,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:37:07,053 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:37:07,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:07,850 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-17 02:37:07,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:37:07,851 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:37:07,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:07,852 INFO L225 Difference]: With dead ends: 92 [2020-09-17 02:37:07,852 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 02:37:07,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:37:07,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 02:37:07,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-17 02:37:07,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:37:07,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:37:07,856 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-17 02:37:07,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:07,856 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:37:07,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:37:07,856 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:37:07,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:07,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:07,857 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:08,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:08,064 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:08,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:08,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-17 02:37:08,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:08,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200070672] [2020-09-17 02:37:08,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:08,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:08,259 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:08,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200070672] [2020-09-17 02:37:08,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203026764] [2020-09-17 02:37:08,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:08,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-17 02:37:08,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:08,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:08,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:08,352 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:08,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:08,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:37:08,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273044616] [2020-09-17 02:37:08,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:08,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:08,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:08,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:08,369 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-17 02:37:09,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:09,493 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-17 02:37:09,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:37:09,494 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:37:09,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:09,494 INFO L225 Difference]: With dead ends: 91 [2020-09-17 02:37:09,495 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:37:09,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:37:09,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:37:09,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-17 02:37:09,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:37:09,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:37:09,497 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-17 02:37:09,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:09,497 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:37:09,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:09,498 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:37:09,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:09,498 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:09,498 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:09,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:09,706 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:09,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:09,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-17 02:37:09,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:09,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052524749] [2020-09-17 02:37:09,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:09,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:09,961 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:09,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052524749] [2020-09-17 02:37:09,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189940460] [2020-09-17 02:37:09,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:10,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:10,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:10,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:10,052 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:10,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:10,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-17 02:37:10,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070800241] [2020-09-17 02:37:10,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-17 02:37:10,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:10,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-17 02:37:10,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-17 02:37:10,053 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-17 02:37:10,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:10,892 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-17 02:37:10,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:37:10,893 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-17 02:37:10,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:10,893 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:37:10,894 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:37:10,894 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:37:10,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:37:10,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-17 02:37:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:37:10,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-17 02:37:10,896 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-17 02:37:10,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:10,896 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-17 02:37:10,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-17 02:37:10,896 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-17 02:37:10,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:10,896 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:10,897 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:11,097 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-17 02:37:11,097 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:11,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:11,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-17 02:37:11,098 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:11,098 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772657551] [2020-09-17 02:37:11,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:11,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772657551] [2020-09-17 02:37:11,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081710836] [2020-09-17 02:37:11,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:11,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:11,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:11,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:11,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:11,412 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:11,430 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:11,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:11,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:37:11,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094010078] [2020-09-17 02:37:11,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:11,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:11,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:11,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:11,432 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-17 02:37:12,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:12,551 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-09-17 02:37:12,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:37:12,552 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:37:12,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:12,552 INFO L225 Difference]: With dead ends: 88 [2020-09-17 02:37:12,552 INFO L226 Difference]: Without dead ends: 80 [2020-09-17 02:37:12,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:37:12,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-17 02:37:12,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-17 02:37:12,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-17 02:37:12,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-17 02:37:12,556 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-17 02:37:12,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:12,556 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-17 02:37:12,556 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:12,556 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-17 02:37:12,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-17 02:37:12,556 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:12,557 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:12,764 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-17 02:37:12,764 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:12,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:12,765 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-17 02:37:12,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:12,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616345185] [2020-09-17 02:37:12,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:12,993 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:12,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616345185] [2020-09-17 02:37:12,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494027779] [2020-09-17 02:37:12,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:13,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-17 02:37:13,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:13,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-17 02:37:13,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:13,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:37:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:13,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:13,109 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-17 02:37:13,109 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140030527] [2020-09-17 02:37:13,109 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:13,110 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:13,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:13,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:13,110 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-17 02:37:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:14,138 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-17 02:37:14,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:37:14,139 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-17 02:37:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:14,140 INFO L225 Difference]: With dead ends: 100 [2020-09-17 02:37:14,140 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:37:14,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:37:14,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:37:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-17 02:37:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:37:14,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-17 02:37:14,142 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-17 02:37:14,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:14,142 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-17 02:37:14,142 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:14,142 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-17 02:37:14,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:14,143 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:14,143 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:14,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-17 02:37:14,345 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:14,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:14,345 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-17 02:37:14,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:14,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245269662] [2020-09-17 02:37:14,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:14,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:14,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245269662] [2020-09-17 02:37:14,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216323834] [2020-09-17 02:37:14,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:14,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:14,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:14,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:14,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:14,650 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:37:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:14,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:14,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:14,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398603209] [2020-09-17 02:37:14,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:14,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:14,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:14,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:14,675 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-17 02:37:15,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:15,782 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-17 02:37:15,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:37:15,782 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:15,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:15,783 INFO L225 Difference]: With dead ends: 84 [2020-09-17 02:37:15,783 INFO L226 Difference]: Without dead ends: 79 [2020-09-17 02:37:15,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:37:15,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-17 02:37:15,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-17 02:37:15,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-17 02:37:15,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-17 02:37:15,786 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-17 02:37:15,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:15,787 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-17 02:37:15,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:15,787 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-17 02:37:15,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:15,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:15,788 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:15,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-17 02:37:15,990 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:15,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:15,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-17 02:37:15,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:15,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855386004] [2020-09-17 02:37:15,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:16,311 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:16,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855386004] [2020-09-17 02:37:16,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132406951] [2020-09-17 02:37:16,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:16,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:37:16,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:16,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:16,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:16,389 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:16,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:16,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:16,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206184212] [2020-09-17 02:37:16,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:16,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:16,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:16,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:16,390 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-17 02:37:16,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:16,868 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-17 02:37:16,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-17 02:37:16,869 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:16,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:16,870 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:37:16,870 INFO L226 Difference]: Without dead ends: 84 [2020-09-17 02:37:16,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-17 02:37:16,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-17 02:37:16,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-17 02:37:16,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:37:16,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-17 02:37:16,872 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-17 02:37:16,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:16,872 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-17 02:37:16,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-17 02:37:16,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:16,873 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:16,873 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:17,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:17,077 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:17,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:17,078 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-17 02:37:17,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:17,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571093119] [2020-09-17 02:37:17,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:17,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:17,398 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:17,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571093119] [2020-09-17 02:37:17,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478860473] [2020-09-17 02:37:17,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:17,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:37:17,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:17,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:17,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:17,493 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:17,505 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:17,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:17,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:17,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503846275] [2020-09-17 02:37:17,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:17,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:17,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:17,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:17,507 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-17 02:37:18,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:18,059 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-17 02:37:18,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-17 02:37:18,060 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:18,061 INFO L225 Difference]: With dead ends: 106 [2020-09-17 02:37:18,061 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:37:18,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-09-17 02:37:18,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:37:18,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-17 02:37:18,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-17 02:37:18,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-17 02:37:18,064 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-17 02:37:18,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:18,064 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-17 02:37:18,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:18,065 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-17 02:37:18,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:18,065 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:18,065 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:18,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-17 02:37:18,269 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:18,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:18,269 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-17 02:37:18,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:18,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301058824] [2020-09-17 02:37:18,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:18,576 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:18,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301058824] [2020-09-17 02:37:18,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897479718] [2020-09-17 02:37:18,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:18,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:18,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:18,656 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:18,656 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:18,656 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:18,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576731490] [2020-09-17 02:37:18,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:18,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:18,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:18,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:18,658 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-17 02:37:19,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:19,285 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-17 02:37:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:37:19,286 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:19,286 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:37:19,286 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:37:19,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:37:19,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:37:19,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-17 02:37:19,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-17 02:37:19,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-17 02:37:19,289 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-17 02:37:19,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:19,289 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-17 02:37:19,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:19,290 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-17 02:37:19,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:19,290 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:19,290 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:19,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-17 02:37:19,497 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:19,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:19,498 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-17 02:37:19,498 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:19,498 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492359657] [2020-09-17 02:37:19,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:19,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:19,805 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:19,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492359657] [2020-09-17 02:37:19,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406704982] [2020-09-17 02:37:19,806 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:19,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:19,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:19,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:19,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:19,898 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:19,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:19,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:19,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511039070] [2020-09-17 02:37:19,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:19,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:19,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:19,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:19,912 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-17 02:37:20,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:20,547 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-17 02:37:20,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:37:20,548 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:20,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:20,548 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:37:20,549 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:37:20,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:37:20,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:37:20,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-17 02:37:20,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:37:20,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-17 02:37:20,551 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-17 02:37:20,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:20,552 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-17 02:37:20,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:20,552 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-17 02:37:20,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:20,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:20,552 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:20,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-17 02:37:20,753 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:20,754 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-17 02:37:20,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:20,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910830205] [2020-09-17 02:37:20,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:21,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910830205] [2020-09-17 02:37:21,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692954851] [2020-09-17 02:37:21,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:21,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:37:21,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:21,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:21,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:21,127 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:21,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:21,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:21,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493474628] [2020-09-17 02:37:21,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:21,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:21,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:21,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:21,128 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-17 02:37:21,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:21,802 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-17 02:37:21,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:37:21,803 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:21,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:21,804 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:37:21,804 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:37:21,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:37:21,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:37:21,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-17 02:37:21,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:37:21,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-17 02:37:21,807 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-17 02:37:21,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:21,808 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-17 02:37:21,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:21,808 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-17 02:37:21,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:21,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:21,808 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:22,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:22,013 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:22,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-17 02:37:22,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:22,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227316564] [2020-09-17 02:37:22,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:22,309 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:22,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227316564] [2020-09-17 02:37:22,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207068634] [2020-09-17 02:37:22,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:22,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:22,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:22,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:22,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:22,398 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:22,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:22,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:22,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446900139] [2020-09-17 02:37:22,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:22,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:22,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:22,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:22,414 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-17 02:37:23,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:23,177 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-17 02:37:23,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:37:23,178 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:23,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:23,178 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:37:23,178 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 02:37:23,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:37:23,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 02:37:23,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-17 02:37:23,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:37:23,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-17 02:37:23,181 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-17 02:37:23,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:23,181 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-17 02:37:23,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-17 02:37:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:23,181 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:23,181 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:23,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:23,382 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:23,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:23,383 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-17 02:37:23,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:23,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625105978] [2020-09-17 02:37:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:23,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:23,648 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:23,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625105978] [2020-09-17 02:37:23,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235199979] [2020-09-17 02:37:23,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:23,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:37:23,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:23,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:23,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:23,736 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:23,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:23,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:23,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633015502] [2020-09-17 02:37:23,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:23,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:23,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:23,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:23,738 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-17 02:37:24,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:24,469 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-17 02:37:24,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:37:24,470 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:24,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:24,471 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:37:24,471 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:37:24,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:37:24,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:37:24,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-17 02:37:24,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 02:37:24,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-17 02:37:24,473 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-17 02:37:24,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:24,474 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-17 02:37:24,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:24,474 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-17 02:37:24,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:24,474 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:24,474 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:24,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:24,676 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:24,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:24,676 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-17 02:37:24,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:24,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656771284] [2020-09-17 02:37:24,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:24,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656771284] [2020-09-17 02:37:24,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980833252] [2020-09-17 02:37:24,966 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:25,034 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:37:25,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:25,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:25,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:25,069 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:25,083 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:25,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:25,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:25,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626214424] [2020-09-17 02:37:25,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:25,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:25,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:25,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:25,085 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-17 02:37:25,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:25,921 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-17 02:37:25,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:37:25,922 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:25,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:25,922 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:37:25,922 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:37:25,923 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:37:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:37:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-17 02:37:25,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:37:25,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-17 02:37:25,925 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-17 02:37:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:25,926 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-17 02:37:25,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:25,926 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-17 02:37:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:25,927 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:25,927 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:26,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-17 02:37:26,135 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:26,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:26,136 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-17 02:37:26,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:26,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2147194359] [2020-09-17 02:37:26,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:26,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:26,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2147194359] [2020-09-17 02:37:26,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130327044] [2020-09-17 02:37:26,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:26,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:26,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:26,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:26,482 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:26,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:26,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:26,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975966557] [2020-09-17 02:37:26,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:26,483 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:26,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:26,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:26,483 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-17 02:37:27,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:27,282 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-17 02:37:27,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:37:27,283 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:27,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:27,283 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:37:27,284 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:37:27,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:37:27,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:37:27,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-17 02:37:27,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 02:37:27,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-17 02:37:27,286 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-17 02:37:27,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:27,286 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-17 02:37:27,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:27,286 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-17 02:37:27,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:27,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:27,287 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:27,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:27,492 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:27,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:27,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-17 02:37:27,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:27,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823381955] [2020-09-17 02:37:27,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:27,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:27,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823381955] [2020-09-17 02:37:27,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116012148] [2020-09-17 02:37:27,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:27,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:27,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:27,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:27,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:27,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:27,871 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:27,872 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:27,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:27,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738492178] [2020-09-17 02:37:27,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:27,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:27,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:27,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:27,873 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-17 02:37:28,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:28,838 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-17 02:37:28,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:37:28,839 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:28,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:28,840 INFO L225 Difference]: With dead ends: 112 [2020-09-17 02:37:28,840 INFO L226 Difference]: Without dead ends: 106 [2020-09-17 02:37:28,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:37:28,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-17 02:37:28,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-17 02:37:28,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:37:28,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-17 02:37:28,843 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-17 02:37:28,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:28,843 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-17 02:37:28,844 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:28,844 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-17 02:37:28,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:28,844 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:28,844 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:29,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-17 02:37:29,051 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:29,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:29,052 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-17 02:37:29,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:29,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066029496] [2020-09-17 02:37:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:29,295 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:29,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066029496] [2020-09-17 02:37:29,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836466812] [2020-09-17 02:37:29,296 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:29,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:37:29,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:29,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:29,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:29,382 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:29,382 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:29,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:29,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996996488] [2020-09-17 02:37:29,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:29,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:29,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:29,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:29,383 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-17 02:37:30,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:30,245 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-17 02:37:30,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:37:30,246 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:30,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:30,247 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:37:30,247 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 02:37:30,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:37:30,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 02:37:30,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-17 02:37:30,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:37:30,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-17 02:37:30,249 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-17 02:37:30,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:30,250 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-17 02:37:30,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:30,250 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-17 02:37:30,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:30,250 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:30,250 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:30,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-17 02:37:30,451 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:30,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:30,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-17 02:37:30,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:30,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527772921] [2020-09-17 02:37:30,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:30,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:30,713 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:30,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527772921] [2020-09-17 02:37:30,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912525013] [2020-09-17 02:37:30,714 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:30,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:30,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:30,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:30,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:30,806 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:30,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:30,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:30,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267847322] [2020-09-17 02:37:30,825 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:30,825 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:30,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:30,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:30,825 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-17 02:37:31,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:31,894 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-17 02:37:31,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:37:31,895 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:31,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:31,896 INFO L225 Difference]: With dead ends: 110 [2020-09-17 02:37:31,896 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 02:37:31,896 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:37:31,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 02:37:31,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-17 02:37:31,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:37:31,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-17 02:37:31,898 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-17 02:37:31,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:31,898 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-17 02:37:31,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:31,898 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-17 02:37:31,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:31,899 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:31,899 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:32,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-17 02:37:32,100 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:32,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:32,100 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-17 02:37:32,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:32,101 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353568083] [2020-09-17 02:37:32,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:32,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:32,349 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:32,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353568083] [2020-09-17 02:37:32,350 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019059330] [2020-09-17 02:37:32,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:32,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:37:32,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:32,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:32,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:32,438 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:32,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:32,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:32,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217697908] [2020-09-17 02:37:32,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:32,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:32,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:32,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:32,440 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-17 02:37:33,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:33,406 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-17 02:37:33,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:37:33,407 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:33,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:33,408 INFO L225 Difference]: With dead ends: 111 [2020-09-17 02:37:33,408 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 02:37:33,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:37:33,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 02:37:33,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-17 02:37:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 02:37:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-17 02:37:33,411 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-17 02:37:33,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:33,412 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-17 02:37:33,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-17 02:37:33,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:33,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:33,412 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:33,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:33,614 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:33,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:33,615 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-17 02:37:33,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:33,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894714903] [2020-09-17 02:37:33,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:33,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:33,866 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:33,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894714903] [2020-09-17 02:37:33,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520740437] [2020-09-17 02:37:33,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:33,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:37:33,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:33,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:33,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:33,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:33,982 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:33,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:33,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:33,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663637837] [2020-09-17 02:37:33,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:33,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:33,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:33,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:33,984 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-17 02:37:35,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:35,149 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-17 02:37:35,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:37:35,150 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:35,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:35,151 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:37:35,151 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 02:37:35,152 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:37:35,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 02:37:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-17 02:37:35,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:37:35,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-17 02:37:35,154 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-17 02:37:35,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:35,154 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-17 02:37:35,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:35,155 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-17 02:37:35,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:35,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:35,155 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:35,356 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-17 02:37:35,356 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:35,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:35,357 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-17 02:37:35,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:35,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494598990] [2020-09-17 02:37:35,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:35,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:35,598 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:35,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494598990] [2020-09-17 02:37:35,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114521295] [2020-09-17 02:37:35,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:35,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:35,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-17 02:37:35,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:35,685 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:35,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:35,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-17 02:37:35,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674295487] [2020-09-17 02:37:35,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-17 02:37:35,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:35,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-17 02:37:35,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-17 02:37:35,687 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-17 02:37:36,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:36,693 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-17 02:37:36,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:37:36,694 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-17 02:37:36,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:36,695 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:37:36,695 INFO L226 Difference]: Without dead ends: 122 [2020-09-17 02:37:36,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:37:36,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-17 02:37:36,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-17 02:37:36,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:37:36,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-17 02:37:36,697 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-17 02:37:36,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:36,697 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-17 02:37:36,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-17 02:37:36,697 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-17 02:37:36,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-17 02:37:36,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:36,698 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:36,898 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:36,899 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:36,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:36,899 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-17 02:37:36,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:36,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591921644] [2020-09-17 02:37:36,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:36,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:37,148 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:37,148 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591921644] [2020-09-17 02:37:37,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51032807] [2020-09-17 02:37:37,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:37,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:37,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:37,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:37,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:37,266 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:37,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:37,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-17 02:37:37,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915200158] [2020-09-17 02:37:37,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:37,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:37,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:37,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:37,268 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-17 02:37:38,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:38,446 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-17 02:37:38,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:37:38,447 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-17 02:37:38,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:38,447 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:37:38,448 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:37:38,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:37:38,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:37:38,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-17 02:37:38,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:37:38,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-17 02:37:38,450 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-17 02:37:38,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:38,450 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-17 02:37:38,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:38,450 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-17 02:37:38,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:38,451 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:38,451 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:38,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:38,652 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:38,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:38,652 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-17 02:37:38,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:38,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007139452] [2020-09-17 02:37:38,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:38,996 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:38,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007139452] [2020-09-17 02:37:38,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520301126] [2020-09-17 02:37:38,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:39,067 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:37:39,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:39,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:39,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:39,083 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:39,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:39,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:37:39,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563227443] [2020-09-17 02:37:39,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:39,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:39,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:39,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:39,084 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-17 02:37:39,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:39,666 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-17 02:37:39,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:37:39,667 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:37:39,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:39,667 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:37:39,667 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:37:39,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-09-17 02:37:39,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:37:39,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-17 02:37:39,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:37:39,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:37:39,669 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:37:39,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:39,669 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:37:39,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:39,670 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:37:39,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:39,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:39,670 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:39,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:39,876 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:39,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:39,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-17 02:37:39,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:39,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241350013] [2020-09-17 02:37:39,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:39,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:40,231 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:40,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241350013] [2020-09-17 02:37:40,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640536847] [2020-09-17 02:37:40,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:40,295 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:40,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:40,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:40,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:40,324 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:40,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:40,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:37:40,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258377539] [2020-09-17 02:37:40,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:37:40,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:40,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:37:40,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:37:40,339 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:37:41,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:41,040 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-17 02:37:41,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:37:41,041 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:37:41,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:41,042 INFO L225 Difference]: With dead ends: 121 [2020-09-17 02:37:41,042 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 02:37:41,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:37:41,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 02:37:41,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-17 02:37:41,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:37:41,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:37:41,045 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:37:41,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:41,045 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:37:41,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:37:41,045 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:37:41,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:41,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:41,046 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:41,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:41,253 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:41,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:41,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-17 02:37:41,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:41,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264829467] [2020-09-17 02:37:41,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:41,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:41,583 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:41,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264829467] [2020-09-17 02:37:41,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542147032] [2020-09-17 02:37:41,584 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:41,647 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:37:41,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:41,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:41,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:41,664 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:41,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:41,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:37:41,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826900636] [2020-09-17 02:37:41,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:41,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:41,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:41,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:41,666 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:37:42,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:42,322 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-17 02:37:42,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:37:42,323 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:37:42,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:42,324 INFO L225 Difference]: With dead ends: 118 [2020-09-17 02:37:42,324 INFO L226 Difference]: Without dead ends: 112 [2020-09-17 02:37:42,325 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-09-17 02:37:42,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-17 02:37:42,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-17 02:37:42,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:37:42,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:37:42,327 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:37:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:42,327 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:37:42,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:42,327 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:37:42,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:42,328 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:42,328 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:42,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:42,529 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:42,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:42,529 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-17 02:37:42,530 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:42,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296825396] [2020-09-17 02:37:42,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:42,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:42,892 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:42,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296825396] [2020-09-17 02:37:42,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70140662] [2020-09-17 02:37:42,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:42,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:37:42,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:42,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:42,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:42,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:42,988 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:42,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:42,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:37:42,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572675007] [2020-09-17 02:37:42,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:37:42,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:42,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:37:42,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:37:42,990 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:37:43,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:43,759 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-17 02:37:43,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:37:43,760 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:37:43,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:43,760 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:37:43,760 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:37:43,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:37:43,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:37:43,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-17 02:37:43,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:37:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:37:43,763 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:37:43,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:43,764 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:37:43,764 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:37:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:37:43,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:43,764 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:43,764 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:43,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-17 02:37:43,965 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:43,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:43,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-17 02:37:43,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:43,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153156334] [2020-09-17 02:37:43,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:44,275 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:44,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153156334] [2020-09-17 02:37:44,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675478912] [2020-09-17 02:37:44,275 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:44,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:44,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:44,357 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:44,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:44,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:37:44,357 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796662735] [2020-09-17 02:37:44,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:44,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:44,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:44,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:44,358 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:37:45,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:45,099 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-17 02:37:45,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:37:45,100 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:37:45,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:45,101 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:37:45,101 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:37:45,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:37:45,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:37:45,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-17 02:37:45,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:37:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:37:45,103 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:37:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:45,103 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:37:45,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:37:45,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:45,104 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:45,104 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:45,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-17 02:37:45,308 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:45,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:45,308 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-17 02:37:45,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:45,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919052181] [2020-09-17 02:37:45,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:45,633 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:45,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919052181] [2020-09-17 02:37:45,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688507945] [2020-09-17 02:37:45,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:45,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:45,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:45,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:45,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:45,725 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:45,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:45,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:37:45,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55354843] [2020-09-17 02:37:45,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:37:45,742 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:45,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:37:45,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:37:45,742 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:37:46,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:46,647 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-17 02:37:46,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:37:46,648 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:37:46,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:46,649 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:37:46,649 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 02:37:46,649 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:37:46,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 02:37:46,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-17 02:37:46,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:37:46,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:37:46,651 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:37:46,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:46,651 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:37:46,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:37:46,651 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:37:46,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:46,652 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:46,652 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:46,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-17 02:37:46,853 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:46,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:46,853 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-17 02:37:46,853 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:46,854 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480255447] [2020-09-17 02:37:46,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:47,152 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:47,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480255447] [2020-09-17 02:37:47,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617879983] [2020-09-17 02:37:47,152 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:47,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:37:47,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:47,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:47,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:47,244 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:47,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:47,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:37:47,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677083177] [2020-09-17 02:37:47,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:47,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:47,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:47,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:47,246 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:37:48,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:48,042 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-17 02:37:48,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:37:48,043 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:37:48,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:48,044 INFO L225 Difference]: With dead ends: 110 [2020-09-17 02:37:48,044 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 02:37:48,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:37:48,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 02:37:48,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-17 02:37:48,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:37:48,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:37:48,047 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:37:48,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:48,047 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:37:48,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:48,047 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:37:48,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:48,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:48,047 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:48,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-17 02:37:48,248 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:48,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:48,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-17 02:37:48,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:48,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457451631] [2020-09-17 02:37:48,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:48,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:48,556 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:48,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457451631] [2020-09-17 02:37:48,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892618816] [2020-09-17 02:37:48,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:48,619 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:48,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:48,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:48,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:48,646 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:48,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:48,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:37:48,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315145598] [2020-09-17 02:37:48,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:37:48,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:48,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:37:48,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:37:48,664 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:37:49,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:49,691 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-17 02:37:49,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:37:49,691 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:37:49,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:49,692 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:37:49,692 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:37:49,692 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:37:49,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:37:49,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-17 02:37:49,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:37:49,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:37:49,694 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:37:49,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:49,694 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:37:49,694 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:37:49,694 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:37:49,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:49,694 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:49,695 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:49,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:49,895 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:49,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:49,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-17 02:37:49,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:49,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149084731] [2020-09-17 02:37:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:49,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:50,191 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:50,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149084731] [2020-09-17 02:37:50,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [982976020] [2020-09-17 02:37:50,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:50,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:37:50,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:50,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:50,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:50,278 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:50,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:50,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:37:50,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168141495] [2020-09-17 02:37:50,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:50,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:50,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:50,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:50,280 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:37:51,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:51,155 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-17 02:37:51,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:37:51,156 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:37:51,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:51,157 INFO L225 Difference]: With dead ends: 106 [2020-09-17 02:37:51,157 INFO L226 Difference]: Without dead ends: 100 [2020-09-17 02:37:51,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:37:51,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-17 02:37:51,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-17 02:37:51,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:37:51,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:37:51,160 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:37:51,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:51,160 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:37:51,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:51,161 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:37:51,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:51,161 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:51,161 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:51,361 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-17 02:37:51,362 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:51,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:51,362 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-17 02:37:51,363 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:51,363 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434998371] [2020-09-17 02:37:51,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:51,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:51,662 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:51,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434998371] [2020-09-17 02:37:51,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366614405] [2020-09-17 02:37:51,663 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:51,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:37:51,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:51,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:51,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:51,761 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:51,778 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:51,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:51,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:37:51,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441683077] [2020-09-17 02:37:51,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:37:51,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:51,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:37:51,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:37:51,780 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:37:52,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:52,915 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-17 02:37:52,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:37:52,916 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:37:52,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:52,917 INFO L225 Difference]: With dead ends: 105 [2020-09-17 02:37:52,917 INFO L226 Difference]: Without dead ends: 99 [2020-09-17 02:37:52,918 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:37:52,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-17 02:37:52,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-17 02:37:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:37:52,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:37:52,920 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:37:52,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:52,920 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:37:52,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:37:52,921 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:37:52,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:52,921 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:52,921 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:53,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:53,128 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:53,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:53,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-17 02:37:53,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:53,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006056056] [2020-09-17 02:37:53,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:53,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:53,422 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:53,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006056056] [2020-09-17 02:37:53,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851003533] [2020-09-17 02:37:53,423 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:53,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:53,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:53,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:53,500 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:53,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:53,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:37:53,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633058846] [2020-09-17 02:37:53,501 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:53,501 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:53,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:53,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:53,502 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:37:54,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:54,473 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-17 02:37:54,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:37:54,474 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:37:54,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:54,475 INFO L225 Difference]: With dead ends: 102 [2020-09-17 02:37:54,475 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 02:37:54,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:37:54,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 02:37:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-17 02:37:54,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:37:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:37:54,478 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:37:54,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:54,479 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:37:54,479 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:54,479 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:37:54,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:54,479 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:54,479 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:54,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:54,680 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:54,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:54,680 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-17 02:37:54,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:54,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018830325] [2020-09-17 02:37:54,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:54,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018830325] [2020-09-17 02:37:54,979 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [535466314] [2020-09-17 02:37:54,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:55,043 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:37:55,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:55,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:55,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:55,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:55,097 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:55,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:55,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:37:55,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930057900] [2020-09-17 02:37:55,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:37:55,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:55,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:37:55,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:37:55,099 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:37:56,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:56,341 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-17 02:37:56,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:37:56,342 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:37:56,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:56,343 INFO L225 Difference]: With dead ends: 101 [2020-09-17 02:37:56,343 INFO L226 Difference]: Without dead ends: 95 [2020-09-17 02:37:56,343 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:37:56,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-17 02:37:56,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-17 02:37:56,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:37:56,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:37:56,346 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:37:56,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:56,346 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:37:56,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:37:56,346 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:37:56,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:56,346 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:56,346 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:56,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-17 02:37:56,547 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:56,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:56,548 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-17 02:37:56,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:56,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541471921] [2020-09-17 02:37:56,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:56,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:56,828 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:56,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541471921] [2020-09-17 02:37:56,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619484944] [2020-09-17 02:37:56,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:56,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-17 02:37:56,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:56,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:56,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:56,936 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:56,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:56,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:37:56,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [36975099] [2020-09-17 02:37:56,937 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:37:56,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:56,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:37:56,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:37:56,937 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:37:57,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:57,968 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-17 02:37:57,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:37:57,969 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:37:57,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:57,970 INFO L225 Difference]: With dead ends: 98 [2020-09-17 02:37:57,970 INFO L226 Difference]: Without dead ends: 92 [2020-09-17 02:37:57,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:37:57,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-17 02:37:57,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-17 02:37:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:37:57,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:37:57,977 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-17 02:37:57,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:57,977 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:37:57,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:37:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:37:57,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:57,978 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:57,978 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:37:58,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:37:58,181 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:37:58,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:37:58,182 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-17 02:37:58,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:37:58,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849103271] [2020-09-17 02:37:58,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:37:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:37:58,463 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:58,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849103271] [2020-09-17 02:37:58,464 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576471358] [2020-09-17 02:37:58,464 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:37:58,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:37:58,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:37:58,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:37:58,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:37:58,558 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:37:58,578 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:37:58,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:37:58,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:37:58,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570743319] [2020-09-17 02:37:58,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:37:58,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:37:58,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:37:58,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:37:58,580 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-17 02:37:59,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:37:59,954 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-17 02:37:59,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:37:59,955 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:37:59,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:37:59,956 INFO L225 Difference]: With dead ends: 97 [2020-09-17 02:37:59,956 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:37:59,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:37:59,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:37:59,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-17 02:37:59,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:37:59,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:37:59,959 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-17 02:37:59,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:37:59,959 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:37:59,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:37:59,960 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:37:59,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:37:59,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:37:59,960 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:00,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-17 02:38:00,161 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:00,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:00,162 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-17 02:38:00,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:00,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236842707] [2020-09-17 02:38:00,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:00,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:00,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236842707] [2020-09-17 02:38:00,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792601637] [2020-09-17 02:38:00,443 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:00,509 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-17 02:38:00,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:00,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:38:00,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:00,552 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:00,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:00,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-17 02:38:00,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412712454] [2020-09-17 02:38:00,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-17 02:38:00,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:00,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-17 02:38:00,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-17 02:38:00,554 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-17 02:38:01,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:01,655 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-17 02:38:01,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:38:01,656 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-17 02:38:01,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:01,657 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:38:01,657 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 02:38:01,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:38:01,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 02:38:01,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-17 02:38:01,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 02:38:01,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-17 02:38:01,660 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-17 02:38:01,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:01,660 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-17 02:38:01,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-17 02:38:01,660 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-17 02:38:01,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:38:01,661 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:01,661 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:01,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-17 02:38:01,862 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:01,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:01,863 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-17 02:38:01,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:01,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828319845] [2020-09-17 02:38:01,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:02,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828319845] [2020-09-17 02:38:02,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880887703] [2020-09-17 02:38:02,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:02,207 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-17 02:38:02,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:02,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:38:02,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:02,237 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:02,253 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:02,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:02,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:38:02,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705915248] [2020-09-17 02:38:02,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:02,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:02,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:02,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:02,255 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-17 02:38:03,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:03,675 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-09-17 02:38:03,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:38:03,676 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:38:03,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:03,677 INFO L225 Difference]: With dead ends: 94 [2020-09-17 02:38:03,677 INFO L226 Difference]: Without dead ends: 86 [2020-09-17 02:38:03,677 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:38:03,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-17 02:38:03,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-09-17 02:38:03,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-17 02:38:03,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-17 02:38:03,679 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-17 02:38:03,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:03,680 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-17 02:38:03,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:03,680 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-17 02:38:03,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-17 02:38:03,680 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:03,680 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:03,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-17 02:38:03,881 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:03,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:03,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-17 02:38:03,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:03,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767237383] [2020-09-17 02:38:03,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:04,134 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:04,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767237383] [2020-09-17 02:38:04,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745893355] [2020-09-17 02:38:04,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:04,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:04,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-17 02:38:04,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:04,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:38:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:04,249 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:04,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-17 02:38:04,250 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664600546] [2020-09-17 02:38:04,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:04,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:04,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:04,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:04,251 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-17 02:38:05,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:05,560 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-17 02:38:05,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:38:05,561 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-17 02:38:05,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:05,562 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:38:05,562 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:38:05,562 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:38:05,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:38:05,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-17 02:38:05,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:38:05,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-17 02:38:05,564 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-17 02:38:05,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:05,564 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-17 02:38:05,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:05,564 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-17 02:38:05,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:05,564 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:05,564 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:05,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-17 02:38:05,765 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:05,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:05,766 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-17 02:38:05,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:05,766 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649274117] [2020-09-17 02:38:05,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:05,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:06,072 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:06,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649274117] [2020-09-17 02:38:06,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654814797] [2020-09-17 02:38:06,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:06,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:38:06,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:06,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:06,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:06,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:38:06,205 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:06,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:06,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:06,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175701846] [2020-09-17 02:38:06,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:06,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:06,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:06,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:06,207 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-17 02:38:07,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:07,615 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-17 02:38:07,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:38:07,616 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:07,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:07,617 INFO L225 Difference]: With dead ends: 90 [2020-09-17 02:38:07,617 INFO L226 Difference]: Without dead ends: 85 [2020-09-17 02:38:07,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:38:07,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-17 02:38:07,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-17 02:38:07,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-17 02:38:07,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-17 02:38:07,619 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-17 02:38:07,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:07,620 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-17 02:38:07,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:07,620 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-17 02:38:07,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:07,620 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:07,620 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:07,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:07,821 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:07,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:07,822 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-17 02:38:07,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:07,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795167833] [2020-09-17 02:38:07,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:08,214 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:08,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795167833] [2020-09-17 02:38:08,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346879789] [2020-09-17 02:38:08,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:08,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:38:08,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:08,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:08,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:08,294 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:08,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:08,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:08,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134029649] [2020-09-17 02:38:08,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:08,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:08,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:08,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:08,296 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-17 02:38:08,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:08,904 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-17 02:38:08,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-17 02:38:08,905 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:08,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:08,905 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:38:08,905 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:38:08,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-09-17 02:38:08,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:38:08,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-17 02:38:08,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:38:08,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-17 02:38:08,908 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-17 02:38:08,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:08,909 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-17 02:38:08,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:08,909 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-17 02:38:08,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:08,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:08,909 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:09,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:09,110 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:09,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:09,110 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-17 02:38:09,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:09,111 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204575100] [2020-09-17 02:38:09,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:09,504 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:09,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204575100] [2020-09-17 02:38:09,505 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [658070730] [2020-09-17 02:38:09,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:09,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:38:09,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:09,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:09,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:09,597 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:09,611 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:09,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:09,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:09,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417203722] [2020-09-17 02:38:09,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:09,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:09,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:09,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:09,613 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-17 02:38:10,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:10,317 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-17 02:38:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-17 02:38:10,318 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:10,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:10,319 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:38:10,319 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:38:10,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-09-17 02:38:10,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:38:10,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-17 02:38:10,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-17 02:38:10,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-17 02:38:10,321 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-17 02:38:10,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:10,321 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-17 02:38:10,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:10,322 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-17 02:38:10,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:10,322 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:10,322 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:10,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:10,523 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:10,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:10,523 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-17 02:38:10,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:10,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466221648] [2020-09-17 02:38:10,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:10,899 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:10,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466221648] [2020-09-17 02:38:10,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170724967] [2020-09-17 02:38:10,900 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:10,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:38:10,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:10,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:10,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:10,984 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:10,985 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:10,985 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:10,985 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833160214] [2020-09-17 02:38:10,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:10,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:10,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:10,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:10,986 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-17 02:38:11,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:11,740 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-17 02:38:11,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:38:11,741 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:11,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:11,742 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:38:11,742 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:38:11,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:38:11,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:38:11,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-17 02:38:11,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-17 02:38:11,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-17 02:38:11,744 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-17 02:38:11,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:11,745 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-17 02:38:11,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:11,745 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-17 02:38:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:11,745 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:11,745 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:11,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:11,946 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:11,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:11,946 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-17 02:38:11,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:11,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37389756] [2020-09-17 02:38:11,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:11,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:12,334 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:12,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37389756] [2020-09-17 02:38:12,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032286902] [2020-09-17 02:38:12,335 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:12,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:38:12,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:12,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:12,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:12,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:12,460 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:12,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:12,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:12,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545580549] [2020-09-17 02:38:12,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:12,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:12,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:12,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:12,461 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-17 02:38:13,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:13,212 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-17 02:38:13,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:38:13,213 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:13,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:13,214 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:38:13,214 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:38:13,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:38:13,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:38:13,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-17 02:38:13,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:38:13,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-17 02:38:13,217 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-17 02:38:13,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:13,217 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-17 02:38:13,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:13,218 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-17 02:38:13,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:13,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:13,218 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:13,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:13,426 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:13,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:13,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-17 02:38:13,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:13,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010683978] [2020-09-17 02:38:13,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:13,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:13,787 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:13,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010683978] [2020-09-17 02:38:13,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [407544130] [2020-09-17 02:38:13,788 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:13,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:13,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:13,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:13,869 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:13,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:13,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:13,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551666151] [2020-09-17 02:38:13,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:13,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:13,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:13,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:13,871 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-17 02:38:14,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:14,677 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-17 02:38:14,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:38:14,679 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:14,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:14,679 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:38:14,679 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:38:14,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:38:14,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:38:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-17 02:38:14,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 02:38:14,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-17 02:38:14,682 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-17 02:38:14,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:14,682 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-17 02:38:14,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:14,682 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-17 02:38:14,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:14,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:14,683 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:14,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:14,884 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:14,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:14,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-17 02:38:14,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:14,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25834626] [2020-09-17 02:38:14,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:14,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:15,252 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:15,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25834626] [2020-09-17 02:38:15,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913483507] [2020-09-17 02:38:15,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:15,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:38:15,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:15,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:15,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:15,347 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:15,364 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:15,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:15,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:15,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745072834] [2020-09-17 02:38:15,365 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:15,365 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:15,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:15,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:15,366 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-17 02:38:16,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:16,297 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-17 02:38:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:38:16,298 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:16,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:16,298 INFO L225 Difference]: With dead ends: 126 [2020-09-17 02:38:16,299 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 02:38:16,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:38:16,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 02:38:16,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-17 02:38:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:38:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-17 02:38:16,303 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-17 02:38:16,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:16,303 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-17 02:38:16,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:16,303 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-17 02:38:16,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:16,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:16,304 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:16,504 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:16,505 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:16,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:16,505 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-17 02:38:16,505 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:16,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256036059] [2020-09-17 02:38:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:16,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:16,861 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:16,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256036059] [2020-09-17 02:38:16,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657362586] [2020-09-17 02:38:16,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:16,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:38:16,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:16,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:16,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:16,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:16,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:16,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317418607] [2020-09-17 02:38:16,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:16,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:16,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:16,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:16,949 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-17 02:38:17,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:17,830 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-17 02:38:17,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:38:17,832 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:17,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:17,832 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:38:17,832 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:38:17,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:38:17,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:38:17,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-17 02:38:17,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:38:17,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-17 02:38:17,835 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-17 02:38:17,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:17,835 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-17 02:38:17,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:17,835 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-17 02:38:17,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:17,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:17,836 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:18,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-17 02:38:18,037 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:18,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:18,037 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-17 02:38:18,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:18,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991689692] [2020-09-17 02:38:18,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:18,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:18,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991689692] [2020-09-17 02:38:18,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365525871] [2020-09-17 02:38:18,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:18,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:38:18,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:18,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:18,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:18,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:18,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:18,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358612678] [2020-09-17 02:38:18,516 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:18,516 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:18,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:18,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:18,516 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-17 02:38:19,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:19,542 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-17 02:38:19,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:38:19,543 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:19,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:19,544 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:38:19,544 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:38:19,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:38:19,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:38:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-17 02:38:19,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:38:19,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-17 02:38:19,547 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-17 02:38:19,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:19,547 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-17 02:38:19,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:19,547 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-17 02:38:19,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:19,548 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:19,548 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:19,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-17 02:38:19,748 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:19,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:19,749 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-17 02:38:19,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:19,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651419190] [2020-09-17 02:38:19,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:19,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:20,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651419190] [2020-09-17 02:38:20,049 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27013148] [2020-09-17 02:38:20,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:20,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:38:20,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:20,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:20,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:20,151 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:20,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:20,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:20,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681760445] [2020-09-17 02:38:20,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:20,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:20,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:20,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:20,153 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-17 02:38:21,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:21,084 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-17 02:38:21,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:38:21,085 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:21,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:21,086 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:38:21,086 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 02:38:21,087 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:38:21,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 02:38:21,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-17 02:38:21,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 02:38:21,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-17 02:38:21,089 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-17 02:38:21,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:21,089 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-17 02:38:21,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:21,089 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-17 02:38:21,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:21,089 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:21,089 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:21,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-17 02:38:21,290 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:21,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:21,291 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-17 02:38:21,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:21,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439805939] [2020-09-17 02:38:21,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:21,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:21,633 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:21,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439805939] [2020-09-17 02:38:21,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93445035] [2020-09-17 02:38:21,634 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:21,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:38:21,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:21,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:21,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:21,735 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:21,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:21,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:21,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991502255] [2020-09-17 02:38:21,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:21,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:21,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:21,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:21,752 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-17 02:38:22,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:22,890 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-17 02:38:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:38:22,891 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:22,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:22,891 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:38:22,891 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 02:38:22,892 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:38:22,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 02:38:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-17 02:38:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:38:22,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-17 02:38:22,894 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-17 02:38:22,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:22,894 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-17 02:38:22,894 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-17 02:38:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:22,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:22,894 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:23,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-17 02:38:23,095 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:23,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:23,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-17 02:38:23,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:23,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330436722] [2020-09-17 02:38:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:23,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330436722] [2020-09-17 02:38:23,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303535245] [2020-09-17 02:38:23,421 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:23,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:23,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:23,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:23,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:23,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:23,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988420916] [2020-09-17 02:38:23,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:23,506 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:23,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:23,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:23,507 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-17 02:38:24,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:24,530 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-17 02:38:24,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:38:24,531 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:24,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:24,532 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:38:24,532 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:38:24,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:38:24,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:38:24,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-17 02:38:24,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:38:24,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-17 02:38:24,535 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-17 02:38:24,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:24,536 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-17 02:38:24,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:24,536 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-17 02:38:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:24,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:24,536 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:24,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:24,737 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:24,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:24,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-17 02:38:24,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:24,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148378355] [2020-09-17 02:38:24,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:25,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148378355] [2020-09-17 02:38:25,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093821753] [2020-09-17 02:38:25,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:25,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:38:25,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:25,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:25,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:25,159 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:25,178 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:25,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:25,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:25,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429288413] [2020-09-17 02:38:25,179 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:25,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:25,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:25,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:25,179 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-17 02:38:26,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:26,421 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-17 02:38:26,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:38:26,422 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:26,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:26,423 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:38:26,423 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:38:26,424 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:38:26,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:38:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-17 02:38:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:38:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-17 02:38:26,426 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-17 02:38:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:26,426 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-17 02:38:26,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:26,426 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-17 02:38:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:26,426 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:26,426 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:26,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:26,627 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:26,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:26,628 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-17 02:38:26,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:26,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287500198] [2020-09-17 02:38:26,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:26,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:26,941 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:26,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287500198] [2020-09-17 02:38:26,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011629079] [2020-09-17 02:38:26,942 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:27,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:38:27,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:27,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:27,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:27,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:27,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:27,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133361796] [2020-09-17 02:38:27,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:27,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:27,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:27,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:27,036 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-17 02:38:28,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:28,138 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-17 02:38:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:38:28,139 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:28,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:28,140 INFO L225 Difference]: With dead ends: 121 [2020-09-17 02:38:28,140 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 02:38:28,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:38:28,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 02:38:28,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-17 02:38:28,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:38:28,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-17 02:38:28,143 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-17 02:38:28,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:28,143 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-17 02:38:28,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:28,143 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-17 02:38:28,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:28,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:28,144 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:28,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-17 02:38:28,345 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:28,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:28,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-17 02:38:28,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:28,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379405545] [2020-09-17 02:38:28,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:28,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:28,659 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:28,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379405545] [2020-09-17 02:38:28,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055175238] [2020-09-17 02:38:28,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:28,724 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:38:28,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:28,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:28,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:28,758 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:28,777 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:28,777 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:28,777 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:28,777 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930110986] [2020-09-17 02:38:28,778 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:28,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:28,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:28,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:28,778 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-17 02:38:30,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:30,140 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-17 02:38:30,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:38:30,141 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:30,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:30,142 INFO L225 Difference]: With dead ends: 118 [2020-09-17 02:38:30,142 INFO L226 Difference]: Without dead ends: 112 [2020-09-17 02:38:30,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:38:30,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-17 02:38:30,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-17 02:38:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:38:30,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-17 02:38:30,145 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-17 02:38:30,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:30,146 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-17 02:38:30,146 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-17 02:38:30,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:30,146 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:30,146 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:30,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:30,347 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:30,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:30,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-17 02:38:30,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:30,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466908471] [2020-09-17 02:38:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:30,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:30,666 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:30,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466908471] [2020-09-17 02:38:30,666 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028301819] [2020-09-17 02:38:30,667 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:30,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:38:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:30,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:30,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:30,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:30,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:30,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016139678] [2020-09-17 02:38:30,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:30,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:30,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:30,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:30,761 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-17 02:38:31,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:31,968 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-17 02:38:31,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:38:31,969 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:31,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:31,970 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:38:31,970 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:38:31,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:38:31,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:38:31,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-17 02:38:31,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 02:38:31,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-17 02:38:31,973 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-17 02:38:31,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:31,974 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-17 02:38:31,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:31,974 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-17 02:38:31,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:31,974 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:31,974 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:32,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:32,182 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:32,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:32,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-17 02:38:32,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:32,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888726438] [2020-09-17 02:38:32,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:32,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:32,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888726438] [2020-09-17 02:38:32,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678747164] [2020-09-17 02:38:32,497 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:32,573 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:38:32,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:32,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:32,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:32,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:32,629 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:32,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:32,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:32,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296660107] [2020-09-17 02:38:32,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:32,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:32,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:32,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:32,630 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-17 02:38:34,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:34,074 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-17 02:38:34,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:38:34,075 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:34,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:34,076 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:38:34,076 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 02:38:34,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:38:34,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 02:38:34,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-17 02:38:34,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:38:34,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-17 02:38:34,078 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-17 02:38:34,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:34,078 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-17 02:38:34,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-17 02:38:34,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:34,078 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:34,079 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:34,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:34,279 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:34,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:34,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-17 02:38:34,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:34,280 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986314709] [2020-09-17 02:38:34,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:34,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:34,590 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:34,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986314709] [2020-09-17 02:38:34,591 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [933455495] [2020-09-17 02:38:34,591 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:34,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:34,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-17 02:38:34,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:34,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:34,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-17 02:38:34,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275778695] [2020-09-17 02:38:34,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-17 02:38:34,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:34,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-17 02:38:34,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-17 02:38:34,685 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-17 02:38:35,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:35,915 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-17 02:38:35,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:38:35,916 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-17 02:38:35,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:35,917 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:38:35,917 INFO L226 Difference]: Without dead ends: 130 [2020-09-17 02:38:35,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:38:35,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-17 02:38:35,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-17 02:38:35,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:38:35,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-17 02:38:35,922 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-17 02:38:35,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:35,923 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-17 02:38:35,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-17 02:38:35,923 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-17 02:38:35,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-17 02:38:35,923 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:35,924 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:36,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:36,131 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:36,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:36,131 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-17 02:38:36,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:36,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758472991] [2020-09-17 02:38:36,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:36,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:36,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758472991] [2020-09-17 02:38:36,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264657283] [2020-09-17 02:38:36,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-09-17 02:38:36,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:38:36,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:36,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:36,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:36,560 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:36,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:36,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-17 02:38:36,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211700601] [2020-09-17 02:38:36,561 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:36,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:36,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:36,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:36,562 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-17 02:38:38,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:38,024 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-17 02:38:38,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:38:38,024 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-17 02:38:38,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:38,025 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:38:38,025 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:38:38,025 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=910, Invalid=2282, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:38:38,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:38:38,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-17 02:38:38,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 02:38:38,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-17 02:38:38,027 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-17 02:38:38,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:38,027 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-17 02:38:38,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:38,027 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-17 02:38:38,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:38,028 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:38,028 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:38,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:38,229 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:38,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:38,229 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-17 02:38:38,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:38,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198754000] [2020-09-17 02:38:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:38,679 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:38,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198754000] [2020-09-17 02:38:38,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423241097] [2020-09-17 02:38:38,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:38,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:38:38,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:38,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:38,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:38,763 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:38,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:38,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:38:38,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817604370] [2020-09-17 02:38:38,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:38,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:38,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:38,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:38,764 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-17 02:38:39,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:39,469 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-17 02:38:39,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:38:39,470 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:38:39,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:39,471 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:38:39,471 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:38:39,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-09-17 02:38:39,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:38:39,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-17 02:38:39,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:38:39,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:38:39,474 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:38:39,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:39,475 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:38:39,475 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:39,475 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:38:39,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:39,475 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:39,476 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:39,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-17 02:38:39,677 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:39,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:39,678 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-17 02:38:39,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:39,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105387647] [2020-09-17 02:38:39,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:39,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:40,117 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:40,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105387647] [2020-09-17 02:38:40,118 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628436456] [2020-09-17 02:38:40,118 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:40,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:38:40,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:40,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:40,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:40,211 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:40,227 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:40,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:40,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:38:40,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867678503] [2020-09-17 02:38:40,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:38:40,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:40,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:38:40,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:38:40,228 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:38:41,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:41,071 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-17 02:38:41,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:38:41,071 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:38:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:41,072 INFO L225 Difference]: With dead ends: 131 [2020-09-17 02:38:41,072 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:38:41,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:38:41,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:38:41,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-17 02:38:41,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:38:41,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:38:41,075 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:38:41,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:41,076 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:38:41,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:38:41,076 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:38:41,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:41,076 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:41,076 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:41,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-17 02:38:41,277 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:41,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:41,278 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-17 02:38:41,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:41,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427128200] [2020-09-17 02:38:41,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:41,691 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:41,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427128200] [2020-09-17 02:38:41,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446618104] [2020-09-17 02:38:41,691 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:41,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:38:41,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:41,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:41,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:41,792 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:41,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:41,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:38:41,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549829028] [2020-09-17 02:38:41,793 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:41,793 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:41,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:41,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:41,793 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:38:42,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:42,540 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-17 02:38:42,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:38:42,541 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:38:42,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:42,541 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:38:42,542 INFO L226 Difference]: Without dead ends: 122 [2020-09-17 02:38:42,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-09-17 02:38:42,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-17 02:38:42,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-17 02:38:42,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:38:42,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:38:42,545 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:38:42,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:42,545 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:38:42,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:42,545 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:38:42,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:42,545 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:42,545 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:42,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:42,746 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:42,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:42,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-17 02:38:42,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:42,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242955986] [2020-09-17 02:38:42,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:42,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:43,161 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:43,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242955986] [2020-09-17 02:38:43,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916851945] [2020-09-17 02:38:43,162 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:43,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:38:43,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:43,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:43,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:43,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:43,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:43,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:38:43,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802944506] [2020-09-17 02:38:43,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:38:43,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:43,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:38:43,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:38:43,280 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:38:44,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:44,217 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-17 02:38:44,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:38:44,218 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:38:44,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:44,219 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:38:44,219 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:38:44,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:38:44,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:38:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-17 02:38:44,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:38:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:38:44,222 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:38:44,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:44,222 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:38:44,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:38:44,222 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:38:44,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:44,223 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:44,223 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:44,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-17 02:38:44,424 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:44,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:44,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-17 02:38:44,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:44,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040115741] [2020-09-17 02:38:44,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:44,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:44,821 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:44,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040115741] [2020-09-17 02:38:44,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68883713] [2020-09-17 02:38:44,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:44,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:44,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:44,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:44,904 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:44,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:44,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:38:44,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519660346] [2020-09-17 02:38:44,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:44,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:44,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:44,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:44,905 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:38:45,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:45,748 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-17 02:38:45,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:38:45,749 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:38:45,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:45,750 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:38:45,750 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:38:45,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:38:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:38:45,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-17 02:38:45,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:38:45,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:38:45,753 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:38:45,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:45,753 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:38:45,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:45,753 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:38:45,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:45,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:45,754 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:45,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:45,955 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:45,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:45,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-17 02:38:45,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:45,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445529234] [2020-09-17 02:38:45,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:46,352 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:46,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445529234] [2020-09-17 02:38:46,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597741254] [2020-09-17 02:38:46,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:46,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:38:46,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:46,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:46,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:46,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:46,465 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:46,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:46,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:38:46,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647108385] [2020-09-17 02:38:46,465 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:38:46,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:46,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:38:46,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:38:46,466 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:38:47,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:47,542 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-17 02:38:47,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:38:47,543 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:38:47,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:47,544 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:38:47,544 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:38:47,544 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:38:47,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:38:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-17 02:38:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:38:47,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:38:47,546 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:38:47,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:47,546 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:38:47,546 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:38:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:38:47,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:47,547 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:47,547 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:47,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:47,754 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:47,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:47,754 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-17 02:38:47,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:47,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628328987] [2020-09-17 02:38:47,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:47,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:48,120 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:48,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628328987] [2020-09-17 02:38:48,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700896833] [2020-09-17 02:38:48,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:48,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:38:48,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:48,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:48,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:48,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:48,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:38:48,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606464680] [2020-09-17 02:38:48,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:48,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:48,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:48,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:48,223 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:38:49,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:49,160 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-17 02:38:49,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:38:49,161 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:38:49,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:49,162 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:38:49,162 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:38:49,163 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:38:49,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:38:49,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-17 02:38:49,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:38:49,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:38:49,165 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:38:49,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:49,165 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:38:49,165 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:49,166 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:38:49,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:49,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:49,166 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:49,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:49,367 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:49,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:49,367 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-17 02:38:49,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:49,368 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529987296] [2020-09-17 02:38:49,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:49,749 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:49,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529987296] [2020-09-17 02:38:49,750 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981876411] [2020-09-17 02:38:49,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:49,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:38:49,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:49,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:49,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:49,844 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:49,862 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:49,863 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:49,863 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:38:49,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311024491] [2020-09-17 02:38:49,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:38:49,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:49,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:38:49,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:38:49,864 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:38:51,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:51,055 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-17 02:38:51,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:38:51,056 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:38:51,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:51,057 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:38:51,057 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:38:51,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:38:51,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:38:51,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-17 02:38:51,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:38:51,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:38:51,060 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:38:51,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:51,060 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:38:51,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:38:51,061 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:38:51,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:51,061 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:51,061 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:51,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:51,269 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:51,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:51,270 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-17 02:38:51,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:51,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451631338] [2020-09-17 02:38:51,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:51,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451631338] [2020-09-17 02:38:51,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893019624] [2020-09-17 02:38:51,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:51,699 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:38:51,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:51,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:51,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:51,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:51,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:51,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:38:51,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628992181] [2020-09-17 02:38:51,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:51,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:51,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:51,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:51,724 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:38:52,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:52,774 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-17 02:38:52,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:38:52,775 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:38:52,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:52,776 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:38:52,776 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 02:38:52,776 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:38:52,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 02:38:52,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-17 02:38:52,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:38:52,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:38:52,778 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:38:52,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:52,778 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:38:52,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:52,778 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:38:52,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:52,779 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:52,779 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:52,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-17 02:38:52,980 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:52,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:52,980 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-17 02:38:52,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:52,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201792975] [2020-09-17 02:38:52,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:53,341 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:53,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201792975] [2020-09-17 02:38:53,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090123285] [2020-09-17 02:38:53,341 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:53,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:38:53,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:53,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:53,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:53,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:53,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:53,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:38:53,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112593341] [2020-09-17 02:38:53,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:38:53,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:53,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:38:53,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:38:53,463 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:38:54,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:54,790 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-17 02:38:54,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:38:54,791 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:38:54,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:54,792 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:38:54,792 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:38:54,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:38:54,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:38:54,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-17 02:38:54,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:38:54,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:38:54,795 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:38:54,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:54,796 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:38:54,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:38:54,802 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:38:54,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:54,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:54,803 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:55,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:55,011 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:55,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:55,011 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-17 02:38:55,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:55,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637539947] [2020-09-17 02:38:55,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:55,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:55,358 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:55,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637539947] [2020-09-17 02:38:55,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229921075] [2020-09-17 02:38:55,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:55,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:55,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:55,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:55,446 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:55,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:55,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:38:55,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866456840] [2020-09-17 02:38:55,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:55,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:55,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:55,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:55,447 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:38:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:56,578 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-17 02:38:56,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:38:56,580 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:38:56,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:56,580 INFO L225 Difference]: With dead ends: 112 [2020-09-17 02:38:56,580 INFO L226 Difference]: Without dead ends: 106 [2020-09-17 02:38:56,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:38:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-17 02:38:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-17 02:38:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:38:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:38:56,583 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:38:56,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:56,583 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:38:56,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:38:56,584 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:38:56,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:56,584 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:56,584 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:56,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-17 02:38:56,785 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:56,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:56,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-17 02:38:56,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:56,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157058878] [2020-09-17 02:38:56,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:56,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:57,148 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:57,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157058878] [2020-09-17 02:38:57,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574334593] [2020-09-17 02:38:57,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:57,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:38:57,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:57,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:57,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:57,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:38:57,273 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:57,273 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:57,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:38:57,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794202291] [2020-09-17 02:38:57,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:38:57,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:57,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:38:57,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:38:57,275 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:38:58,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:38:58,746 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-17 02:38:58,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:38:58,747 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:38:58,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:38:58,747 INFO L225 Difference]: With dead ends: 111 [2020-09-17 02:38:58,747 INFO L226 Difference]: Without dead ends: 105 [2020-09-17 02:38:58,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:38:58,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-17 02:38:58,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-17 02:38:58,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:38:58,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:38:58,750 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:38:58,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:38:58,750 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:38:58,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:38:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:38:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:38:58,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:38:58,751 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:38:58,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-17 02:38:58,952 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:38:58,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:38:58,952 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-17 02:38:58,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:38:58,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774440092] [2020-09-17 02:38:58,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:38:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:38:59,306 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:59,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774440092] [2020-09-17 02:38:59,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26737910] [2020-09-17 02:38:59,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:38:59,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:38:59,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:38:59,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:38:59,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:38:59,404 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:38:59,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:38:59,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:38:59,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481147313] [2020-09-17 02:38:59,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:38:59,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:38:59,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:38:59,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:38:59,405 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:39:00,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:00,641 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-17 02:39:00,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:39:00,643 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:39:00,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:00,643 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:39:00,643 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 02:39:00,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:39:00,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 02:39:00,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-17 02:39:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:39:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:39:00,645 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:39:00,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:00,646 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:39:00,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:39:00,646 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:39:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:39:00,646 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:00,646 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:00,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:00,851 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:00,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:00,852 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-17 02:39:00,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:00,853 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146977058] [2020-09-17 02:39:00,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:00,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:01,223 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:01,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146977058] [2020-09-17 02:39:01,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058460012] [2020-09-17 02:39:01,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:01,289 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:39:01,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:01,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:39:01,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:01,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:01,351 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:01,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:01,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:39:01,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221772085] [2020-09-17 02:39:01,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:01,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:01,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:01,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:01,352 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:39:02,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:02,985 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-17 02:39:02,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:39:02,986 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:39:02,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:02,987 INFO L225 Difference]: With dead ends: 107 [2020-09-17 02:39:02,987 INFO L226 Difference]: Without dead ends: 101 [2020-09-17 02:39:02,988 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:39:02,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-17 02:39:02,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-17 02:39:02,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:39:02,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:39:02,990 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:39:02,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:02,991 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:39:02,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:02,991 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:39:02,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:39:02,991 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:02,991 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:03,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:03,197 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:03,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:03,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-17 02:39:03,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:03,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943939819] [2020-09-17 02:39:03,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:03,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:03,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943939819] [2020-09-17 02:39:03,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969304570] [2020-09-17 02:39:03,550 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:03,617 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-17 02:39:03,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:03,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:39:03,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:03,646 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:03,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:03,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:39:03,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484866217] [2020-09-17 02:39:03,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:39:03,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:03,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:39:03,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:39:03,647 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:39:04,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:04,987 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-17 02:39:04,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:39:04,989 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:39:04,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:04,989 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:39:04,989 INFO L226 Difference]: Without dead ends: 98 [2020-09-17 02:39:04,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:39:04,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-17 02:39:04,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-17 02:39:04,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:39:04,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:39:04,992 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-17 02:39:04,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:04,992 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:39:04,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:39:04,992 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:39:04,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:39:04,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:04,993 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:05,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:05,194 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:05,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:05,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-17 02:39:05,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:05,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741754617] [2020-09-17 02:39:05,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:05,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:05,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741754617] [2020-09-17 02:39:05,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547632523] [2020-09-17 02:39:05,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:05,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-17 02:39:05,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:05,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:39:05,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:05,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:05,677 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:05,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:05,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:39:05,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647739605] [2020-09-17 02:39:05,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:05,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:05,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:05,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:05,683 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-17 02:39:07,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:07,399 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-17 02:39:07,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:39:07,400 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:39:07,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:07,401 INFO L225 Difference]: With dead ends: 103 [2020-09-17 02:39:07,401 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:39:07,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:39:07,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:39:07,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-17 02:39:07,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:39:07,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:39:07,404 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-17 02:39:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:07,404 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:39:07,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:07,404 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:39:07,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:39:07,404 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:07,404 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:07,611 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-17 02:39:07,611 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:07,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:07,612 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-17 02:39:07,612 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:07,612 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647086864] [2020-09-17 02:39:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:07,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:07,961 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:07,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647086864] [2020-09-17 02:39:07,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920190286] [2020-09-17 02:39:07,962 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:08,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:39:08,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:08,065 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:08,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:08,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-17 02:39:08,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037296727] [2020-09-17 02:39:08,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-17 02:39:08,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:08,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-17 02:39:08,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-17 02:39:08,067 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-17 02:39:09,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:09,474 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-17 02:39:09,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:39:09,475 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-17 02:39:09,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:09,475 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:39:09,475 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:39:09,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:39:09,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:39:09,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-17 02:39:09,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 02:39:09,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-17 02:39:09,478 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-17 02:39:09,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:09,478 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-17 02:39:09,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-17 02:39:09,478 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-17 02:39:09,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:39:09,478 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:09,479 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:09,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:09,679 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:09,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:09,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-17 02:39:09,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:09,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130632237] [2020-09-17 02:39:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:09,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:10,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130632237] [2020-09-17 02:39:10,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057464622] [2020-09-17 02:39:10,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:10,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:39:10,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:10,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:10,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:10,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:10,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:39:10,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938020672] [2020-09-17 02:39:10,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:10,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:10,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:10,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:10,160 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-17 02:39:11,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:11,735 INFO L93 Difference]: Finished difference Result 98 states and 245 transitions. [2020-09-17 02:39:11,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:39:11,736 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:39:11,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:11,737 INFO L225 Difference]: With dead ends: 98 [2020-09-17 02:39:11,737 INFO L226 Difference]: Without dead ends: 90 [2020-09-17 02:39:11,737 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 809 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=924, Invalid=2382, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:39:11,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-17 02:39:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 65. [2020-09-17 02:39:11,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-17 02:39:11,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-17 02:39:11,739 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-17 02:39:11,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:11,739 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-17 02:39:11,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:11,739 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-17 02:39:11,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-17 02:39:11,739 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:11,739 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:11,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:11,940 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:11,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:11,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-17 02:39:11,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:11,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140541111] [2020-09-17 02:39:11,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:11,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:12,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140541111] [2020-09-17 02:39:12,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119563111] [2020-09-17 02:39:12,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:12,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-17 02:39:12,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:12,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-17 02:39:12,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:12,389 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:39:12,417 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:12,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:12,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-17 02:39:12,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30615658] [2020-09-17 02:39:12,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:12,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:12,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:12,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:12,419 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-17 02:39:14,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:14,042 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-17 02:39:14,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:39:14,044 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-17 02:39:14,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:14,044 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:39:14,044 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:39:14,045 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:39:14,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:39:14,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-17 02:39:14,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:39:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-17 02:39:14,047 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-17 02:39:14,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:14,047 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-17 02:39:14,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:14,047 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-17 02:39:14,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:14,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:14,048 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:14,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:14,249 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:14,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:14,249 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-17 02:39:14,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:14,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136016800] [2020-09-17 02:39:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:14,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:14,622 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:14,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136016800] [2020-09-17 02:39:14,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187603902] [2020-09-17 02:39:14,623 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:14,692 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:39:14,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:14,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:14,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:14,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:39:14,773 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:14,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:14,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:14,773 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629622168] [2020-09-17 02:39:14,774 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:14,774 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:14,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:14,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:14,774 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-17 02:39:16,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:16,515 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-17 02:39:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:39:16,517 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:16,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:16,517 INFO L225 Difference]: With dead ends: 96 [2020-09-17 02:39:16,517 INFO L226 Difference]: Without dead ends: 91 [2020-09-17 02:39:16,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:39:16,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-17 02:39:16,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-17 02:39:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-17 02:39:16,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-17 02:39:16,520 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-17 02:39:16,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:16,520 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-17 02:39:16,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:16,520 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-17 02:39:16,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:16,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:16,521 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:16,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:16,722 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:16,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:16,722 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-17 02:39:16,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:16,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980665832] [2020-09-17 02:39:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:17,213 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:17,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980665832] [2020-09-17 02:39:17,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292798232] [2020-09-17 02:39:17,214 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:17,284 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:39:17,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:17,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:17,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:17,298 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:17,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:17,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:17,298 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510750961] [2020-09-17 02:39:17,298 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:17,299 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:17,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:17,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:17,299 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-17 02:39:18,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:18,059 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-17 02:39:18,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-17 02:39:18,060 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:18,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:18,061 INFO L225 Difference]: With dead ends: 102 [2020-09-17 02:39:18,061 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 02:39:18,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-09-17 02:39:18,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 02:39:18,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-17 02:39:18,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:39:18,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-17 02:39:18,063 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-17 02:39:18,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:18,064 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-17 02:39:18,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:18,064 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-17 02:39:18,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:18,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:18,064 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:18,265 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-17 02:39:18,265 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:18,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:18,266 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-17 02:39:18,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:18,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333946834] [2020-09-17 02:39:18,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:18,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:18,761 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:18,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333946834] [2020-09-17 02:39:18,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490222309] [2020-09-17 02:39:18,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:18,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:39:18,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:18,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:18,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:18,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:18,878 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:18,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:18,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:18,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129661621] [2020-09-17 02:39:18,879 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:18,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:18,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:18,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:18,880 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-09-17 02:39:19,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:19,649 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-09-17 02:39:19,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-17 02:39:19,650 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:19,650 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:39:19,650 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 02:39:19,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-09-17 02:39:19,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 02:39:19,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-09-17 02:39:19,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-17 02:39:19,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-09-17 02:39:19,653 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-09-17 02:39:19,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:19,653 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-09-17 02:39:19,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:19,653 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-09-17 02:39:19,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:19,654 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:19,654 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:19,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-17 02:39:19,855 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:19,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:19,855 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-09-17 02:39:19,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:19,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048601515] [2020-09-17 02:39:19,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:20,324 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:20,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048601515] [2020-09-17 02:39:20,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897430098] [2020-09-17 02:39:20,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:20,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:20,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:20,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:20,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:20,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:20,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12450289] [2020-09-17 02:39:20,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:20,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:20,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:20,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:20,406 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-09-17 02:39:21,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:21,327 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-09-17 02:39:21,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:39:21,328 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:21,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:21,328 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:39:21,329 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:39:21,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:39:21,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:39:21,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-09-17 02:39:21,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-17 02:39:21,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-09-17 02:39:21,331 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-09-17 02:39:21,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:21,331 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-09-17 02:39:21,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:21,331 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-09-17 02:39:21,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:21,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:21,331 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:21,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-17 02:39:21,532 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:21,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:21,533 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-09-17 02:39:21,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:21,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287122987] [2020-09-17 02:39:21,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:22,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287122987] [2020-09-17 02:39:22,018 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060240777] [2020-09-17 02:39:22,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:22,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:39:22,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:22,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:22,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:22,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:22,131 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:22,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:22,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:22,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316256825] [2020-09-17 02:39:22,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:22,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:22,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:22,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:22,132 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-09-17 02:39:23,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:23,080 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-09-17 02:39:23,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:39:23,081 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:23,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:23,082 INFO L225 Difference]: With dead ends: 139 [2020-09-17 02:39:23,082 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:39:23,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:39:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:39:23,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-09-17 02:39:23,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:39:23,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-09-17 02:39:23,085 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-09-17 02:39:23,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:23,086 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-09-17 02:39:23,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:23,086 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-09-17 02:39:23,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:23,086 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:23,086 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:23,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-17 02:39:23,294 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:23,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:23,295 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-09-17 02:39:23,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:23,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905307314] [2020-09-17 02:39:23,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:23,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:23,752 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:23,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905307314] [2020-09-17 02:39:23,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132804770] [2020-09-17 02:39:23,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:23,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:39:23,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:23,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:23,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:23,844 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:23,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:23,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:23,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899787891] [2020-09-17 02:39:23,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:23,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:23,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:23,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:23,846 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-09-17 02:39:24,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:24,850 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-09-17 02:39:24,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:39:24,852 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:24,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:24,852 INFO L225 Difference]: With dead ends: 139 [2020-09-17 02:39:24,853 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:39:24,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:39:24,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:39:24,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-09-17 02:39:24,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 02:39:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-09-17 02:39:24,855 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-09-17 02:39:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:24,856 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-09-17 02:39:24,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:24,856 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-09-17 02:39:24,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:24,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:24,856 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:25,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:25,057 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:25,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:25,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-09-17 02:39:25,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:25,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227487906] [2020-09-17 02:39:25,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:25,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:25,513 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:25,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227487906] [2020-09-17 02:39:25,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583407872] [2020-09-17 02:39:25,514 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:25,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:39:25,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:25,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:25,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:25,618 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:25,633 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:25,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:25,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:25,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582006572] [2020-09-17 02:39:25,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:25,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:25,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:25,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:25,634 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-09-17 02:39:26,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:26,746 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-09-17 02:39:26,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:39:26,747 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:26,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:26,748 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:39:26,748 INFO L226 Difference]: Without dead ends: 130 [2020-09-17 02:39:26,748 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:39:26,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-17 02:39:26,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-09-17 02:39:26,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:39:26,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-09-17 02:39:26,750 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-09-17 02:39:26,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:26,751 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-09-17 02:39:26,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:26,751 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-09-17 02:39:26,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:26,751 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:26,751 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:26,951 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-17 02:39:26,952 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:26,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:26,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-09-17 02:39:26,953 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:26,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706802237] [2020-09-17 02:39:26,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:27,403 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:27,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706802237] [2020-09-17 02:39:27,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331819449] [2020-09-17 02:39:27,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:27,474 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:39:27,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:27,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:27,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:27,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:27,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:27,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114236680] [2020-09-17 02:39:27,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:27,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:27,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:27,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:27,497 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-09-17 02:39:28,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:28,515 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-09-17 02:39:28,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:39:28,516 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:28,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:28,516 INFO L225 Difference]: With dead ends: 137 [2020-09-17 02:39:28,516 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:39:28,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:39:28,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:39:28,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-09-17 02:39:28,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:39:28,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-09-17 02:39:28,519 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-09-17 02:39:28,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:28,520 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-09-17 02:39:28,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:28,520 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-09-17 02:39:28,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:28,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:28,520 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:28,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:28,721 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:28,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:28,721 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-09-17 02:39:28,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:28,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204149029] [2020-09-17 02:39:28,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:29,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204149029] [2020-09-17 02:39:29,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155677813] [2020-09-17 02:39:29,160 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:29,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:39:29,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:29,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:29,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:29,277 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:29,292 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:29,293 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:29,293 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:29,293 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214175657] [2020-09-17 02:39:29,293 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:29,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:29,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:29,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:29,294 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-09-17 02:39:30,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:30,466 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-09-17 02:39:30,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:39:30,472 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:30,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:30,473 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:39:30,473 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:39:30,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:39:30,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:39:30,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-09-17 02:39:30,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:39:30,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-09-17 02:39:30,475 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-09-17 02:39:30,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:30,475 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-09-17 02:39:30,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:30,476 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-09-17 02:39:30,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:30,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:30,476 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:30,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-17 02:39:30,677 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:30,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:30,678 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-09-17 02:39:30,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:30,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216555782] [2020-09-17 02:39:30,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:30,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:31,089 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:31,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216555782] [2020-09-17 02:39:31,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735081567] [2020-09-17 02:39:31,090 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:31,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:31,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:31,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:31,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:31,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33638104] [2020-09-17 02:39:31,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:31,177 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:31,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:31,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:31,177 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-09-17 02:39:32,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:32,292 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-09-17 02:39:32,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:39:32,293 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:32,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:32,293 INFO L225 Difference]: With dead ends: 135 [2020-09-17 02:39:32,293 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 02:39:32,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:39:32,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 02:39:32,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-09-17 02:39:32,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:39:32,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-09-17 02:39:32,296 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-09-17 02:39:32,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:32,296 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-09-17 02:39:32,297 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:32,297 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-09-17 02:39:32,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:32,297 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:32,297 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:32,497 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:32,498 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:32,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:32,498 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-09-17 02:39:32,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:32,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585070338] [2020-09-17 02:39:32,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:32,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:32,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585070338] [2020-09-17 02:39:32,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707975553] [2020-09-17 02:39:32,924 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:32,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:39:32,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:32,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:32,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:33,052 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:33,073 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:33,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:33,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:33,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676438172] [2020-09-17 02:39:33,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:33,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:33,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:33,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:33,074 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-09-17 02:39:34,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:34,427 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-09-17 02:39:34,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:39:34,428 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:34,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:34,429 INFO L225 Difference]: With dead ends: 132 [2020-09-17 02:39:34,429 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 02:39:34,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:39:34,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 02:39:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-09-17 02:39:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:39:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-09-17 02:39:34,431 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-09-17 02:39:34,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:34,431 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-09-17 02:39:34,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:34,432 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-09-17 02:39:34,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:34,432 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:34,432 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:34,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:34,633 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:34,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:34,634 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-09-17 02:39:34,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:34,634 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937067176] [2020-09-17 02:39:34,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:34,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:35,027 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:35,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937067176] [2020-09-17 02:39:35,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96587269] [2020-09-17 02:39:35,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:35,100 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:39:35,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:35,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:35,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:35,123 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:35,123 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:35,123 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:35,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831380952] [2020-09-17 02:39:35,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:35,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:35,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:35,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:35,124 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-09-17 02:39:36,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:36,379 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-09-17 02:39:36,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:39:36,380 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:36,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:36,381 INFO L225 Difference]: With dead ends: 133 [2020-09-17 02:39:36,381 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 02:39:36,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:39:36,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 02:39:36,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-09-17 02:39:36,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 02:39:36,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-09-17 02:39:36,391 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-09-17 02:39:36,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:36,391 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-09-17 02:39:36,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:36,391 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-09-17 02:39:36,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:36,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:36,391 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:36,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:36,592 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:36,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:36,593 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-09-17 02:39:36,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:36,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747273173] [2020-09-17 02:39:36,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:36,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:37,003 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:37,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747273173] [2020-09-17 02:39:37,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095473574] [2020-09-17 02:39:37,004 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:37,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:39:37,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:37,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:37,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:37,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:37,127 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:37,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:37,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:37,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122686103] [2020-09-17 02:39:37,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:37,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:37,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:37,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:37,128 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-09-17 02:39:38,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:38,609 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-09-17 02:39:38,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:39:38,610 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:38,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:38,610 INFO L225 Difference]: With dead ends: 130 [2020-09-17 02:39:38,611 INFO L226 Difference]: Without dead ends: 124 [2020-09-17 02:39:38,611 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:39:38,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-17 02:39:38,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-09-17 02:39:38,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:39:38,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-09-17 02:39:38,614 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-09-17 02:39:38,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:38,615 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-09-17 02:39:38,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:38,615 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-09-17 02:39:38,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:38,615 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:38,615 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:38,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:38,826 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:38,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:38,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-09-17 02:39:38,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:38,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424610766] [2020-09-17 02:39:38,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:38,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:39,215 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:39,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424610766] [2020-09-17 02:39:39,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481161377] [2020-09-17 02:39:39,216 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:39,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:39:39,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:39,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:39,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:39,313 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:39,314 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:39,314 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:39,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865438990] [2020-09-17 02:39:39,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:39,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:39,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:39,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:39,315 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-09-17 02:39:40,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:40,637 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-09-17 02:39:40,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:39:40,638 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:40,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:40,639 INFO L225 Difference]: With dead ends: 131 [2020-09-17 02:39:40,639 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:39:40,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:39:40,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:39:40,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-09-17 02:39:40,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 02:39:40,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-09-17 02:39:40,642 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-09-17 02:39:40,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:40,642 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-09-17 02:39:40,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:40,642 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-09-17 02:39:40,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:40,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:40,643 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:40,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-17 02:39:40,844 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:40,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:40,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-09-17 02:39:40,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:40,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902622328] [2020-09-17 02:39:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:41,252 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:41,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902622328] [2020-09-17 02:39:41,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788157193] [2020-09-17 02:39:41,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:41,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:39:41,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:41,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:41,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:41,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:41,385 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:41,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:41,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:41,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594253215] [2020-09-17 02:39:41,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:41,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:41,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:41,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:41,386 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-09-17 02:39:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:42,995 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-09-17 02:39:42,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:39:42,997 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:42,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:42,997 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:39:42,997 INFO L226 Difference]: Without dead ends: 122 [2020-09-17 02:39:42,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:39:42,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-17 02:39:43,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-09-17 02:39:43,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 02:39:43,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-09-17 02:39:43,000 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-09-17 02:39:43,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:43,001 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-09-17 02:39:43,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:43,001 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-09-17 02:39:43,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:43,001 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:43,001 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:43,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-17 02:39:43,202 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:43,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:43,203 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-09-17 02:39:43,203 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:43,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747600948] [2020-09-17 02:39:43,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:43,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:43,598 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:43,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747600948] [2020-09-17 02:39:43,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661485733] [2020-09-17 02:39:43,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:43,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:43,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:43,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:43,692 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:43,692 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:43,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:43,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378039097] [2020-09-17 02:39:43,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:43,693 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:43,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:43,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:43,693 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-09-17 02:39:45,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:45,086 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-09-17 02:39:45,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:39:45,087 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:45,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:45,088 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:39:45,088 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:39:45,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:39:45,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:39:45,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-09-17 02:39:45,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:39:45,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-17 02:39:45,090 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-09-17 02:39:45,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:45,090 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-17 02:39:45,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:45,090 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-17 02:39:45,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:45,090 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:45,091 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:45,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-17 02:39:45,291 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:45,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:45,292 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-09-17 02:39:45,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:45,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412135123] [2020-09-17 02:39:45,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:45,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412135123] [2020-09-17 02:39:45,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537470278] [2020-09-17 02:39:45,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:45,740 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:39:45,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:45,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:45,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:45,774 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:45,798 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:45,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:45,798 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:45,798 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1674019668] [2020-09-17 02:39:45,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:45,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:45,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:45,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:45,799 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-09-17 02:39:47,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:47,547 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-09-17 02:39:47,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:39:47,549 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:47,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:47,549 INFO L225 Difference]: With dead ends: 126 [2020-09-17 02:39:47,549 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 02:39:47,550 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:39:47,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 02:39:47,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-09-17 02:39:47,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:39:47,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-17 02:39:47,551 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-09-17 02:39:47,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:47,551 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-17 02:39:47,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:47,552 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-17 02:39:47,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:47,552 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:47,552 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:47,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-17 02:39:47,753 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:47,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:47,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-09-17 02:39:47,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:47,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435593422] [2020-09-17 02:39:47,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:47,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:48,145 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:48,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435593422] [2020-09-17 02:39:48,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852965362] [2020-09-17 02:39:48,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:48,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:39:48,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:48,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:48,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:48,251 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:48,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:48,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:48,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299793139] [2020-09-17 02:39:48,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:48,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:48,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:48,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:48,253 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-09-17 02:39:49,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:49,760 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-09-17 02:39:49,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:39:49,762 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:49,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:49,762 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:39:49,762 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:39:49,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:39:49,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:39:49,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-09-17 02:39:49,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 02:39:49,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-09-17 02:39:49,765 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-09-17 02:39:49,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:49,766 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-09-17 02:39:49,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:49,766 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-09-17 02:39:49,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:49,766 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:49,766 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:49,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:49,967 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:49,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:49,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-09-17 02:39:49,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:49,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121255899] [2020-09-17 02:39:49,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:49,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:50,358 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:50,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121255899] [2020-09-17 02:39:50,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270175912] [2020-09-17 02:39:50,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:50,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:39:50,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:50,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:50,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:50,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:50,488 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:50,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:50,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:50,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785431952] [2020-09-17 02:39:50,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:50,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:50,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:50,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:50,490 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-09-17 02:39:52,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:52,365 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-09-17 02:39:52,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:39:52,366 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:52,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:52,366 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:39:52,366 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:39:52,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:39:52,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:39:52,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-09-17 02:39:52,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:39:52,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-17 02:39:52,368 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-09-17 02:39:52,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:52,368 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-17 02:39:52,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:52,369 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-17 02:39:52,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:52,369 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:52,369 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:52,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-17 02:39:52,570 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:52,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:52,570 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-09-17 02:39:52,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:52,571 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529120338] [2020-09-17 02:39:52,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:52,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:52,968 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:52,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529120338] [2020-09-17 02:39:52,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535733770] [2020-09-17 02:39:52,969 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:53,040 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:39:53,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:53,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-17 02:39:53,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:53,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:53,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-17 02:39:53,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983283721] [2020-09-17 02:39:53,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-17 02:39:53,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:53,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-17 02:39:53,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-17 02:39:53,075 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-09-17 02:39:54,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:54,668 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-09-17 02:39:54,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:39:54,669 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-17 02:39:54,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:54,670 INFO L225 Difference]: With dead ends: 144 [2020-09-17 02:39:54,670 INFO L226 Difference]: Without dead ends: 138 [2020-09-17 02:39:54,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:39:54,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-17 02:39:54,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-09-17 02:39:54,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:39:54,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-09-17 02:39:54,674 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-09-17 02:39:54,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:54,674 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-09-17 02:39:54,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-17 02:39:54,674 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-09-17 02:39:54,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-17 02:39:54,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:54,675 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:54,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:54,885 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:54,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:54,886 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-09-17 02:39:54,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:54,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808025058] [2020-09-17 02:39:54,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:55,273 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:55,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808025058] [2020-09-17 02:39:55,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194718986] [2020-09-17 02:39:55,274 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:55,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:39:55,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:55,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:39:55,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:55,418 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:55,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:55,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-17 02:39:55,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631093567] [2020-09-17 02:39:55,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:55,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:55,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:55,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:55,420 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-09-17 02:39:57,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:57,269 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-09-17 02:39:57,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:39:57,270 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-17 02:39:57,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:57,271 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:39:57,271 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:39:57,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1106, Invalid=2800, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:39:57,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:39:57,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-09-17 02:39:57,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 02:39:57,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-09-17 02:39:57,273 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-09-17 02:39:57,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:57,273 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-09-17 02:39:57,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:57,273 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-09-17 02:39:57,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:39:57,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:57,273 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:57,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-17 02:39:57,474 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:57,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:57,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-09-17 02:39:57,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:57,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784896577] [2020-09-17 02:39:57,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:57,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:58,017 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:58,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784896577] [2020-09-17 02:39:58,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294463779] [2020-09-17 02:39:58,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:58,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:39:58,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:58,098 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:58,098 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:58,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:39:58,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537689515] [2020-09-17 02:39:58,099 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:39:58,099 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:58,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:39:58,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:39:58,100 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-09-17 02:39:59,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:39:59,006 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-09-17 02:39:59,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:39:59,008 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:39:59,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:39:59,008 INFO L225 Difference]: With dead ends: 144 [2020-09-17 02:39:59,009 INFO L226 Difference]: Without dead ends: 138 [2020-09-17 02:39:59,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-09-17 02:39:59,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-17 02:39:59,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-09-17 02:39:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:39:59,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:39:59,014 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:39:59,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:39:59,014 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:39:59,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:39:59,015 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:39:59,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:39:59,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:39:59,015 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:39:59,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:59,218 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:39:59,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:39:59,219 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-09-17 02:39:59,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:39:59,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86874396] [2020-09-17 02:39:59,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:39:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:39:59,782 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:59,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86874396] [2020-09-17 02:39:59,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702079708] [2020-09-17 02:39:59,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:39:59,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:39:59,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:39:59,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:39:59,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:39:59,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:39:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:39:59,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:39:59,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:39:59,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678205202] [2020-09-17 02:39:59,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:39:59,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:39:59,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:39:59,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:39:59,902 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:00,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:00,955 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-09-17 02:40:00,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:40:00,956 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:00,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:00,956 INFO L225 Difference]: With dead ends: 141 [2020-09-17 02:40:00,956 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 02:40:00,957 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:40:00,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 02:40:00,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-09-17 02:40:00,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:00,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:00,960 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:00,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:00,960 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:00,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:00,960 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:00,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:00,960 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:00,960 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:01,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-09-17 02:40:01,161 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:01,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:01,162 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-09-17 02:40:01,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:01,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247451157] [2020-09-17 02:40:01,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:01,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:01,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247451157] [2020-09-17 02:40:01,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831643547] [2020-09-17 02:40:01,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:01,755 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:40:01,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:01,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:01,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:01,775 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:01,776 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:01,776 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:01,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137371745] [2020-09-17 02:40:01,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:01,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:01,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:01,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:01,777 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:02,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:02,797 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-09-17 02:40:02,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:40:02,798 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:02,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:02,799 INFO L225 Difference]: With dead ends: 138 [2020-09-17 02:40:02,799 INFO L226 Difference]: Without dead ends: 132 [2020-09-17 02:40:02,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-09-17 02:40:02,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-17 02:40:02,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-09-17 02:40:02,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:02,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:02,801 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:02,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:02,802 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:02,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:02,802 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:02,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:02,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:02,802 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:03,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:03,003 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:03,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:03,004 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-09-17 02:40:03,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:03,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299952643] [2020-09-17 02:40:03,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:03,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:03,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299952643] [2020-09-17 02:40:03,524 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139227451] [2020-09-17 02:40:03,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:03,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:40:03,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:03,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:03,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:03,626 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:03,643 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:03,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:03,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:03,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351033940] [2020-09-17 02:40:03,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:03,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:03,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:03,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:03,644 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:04,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:04,823 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-09-17 02:40:04,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:40:04,824 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:04,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:04,825 INFO L225 Difference]: With dead ends: 137 [2020-09-17 02:40:04,825 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:40:04,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:40:04,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:40:04,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-09-17 02:40:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:04,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:04,827 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:04,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:04,827 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:04,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:04,828 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:04,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:04,828 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:04,828 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:05,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-09-17 02:40:05,029 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:05,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:05,029 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-09-17 02:40:05,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:05,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440465458] [2020-09-17 02:40:05,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:05,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:05,531 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:05,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440465458] [2020-09-17 02:40:05,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840914360] [2020-09-17 02:40:05,532 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:05,601 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:40:05,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:05,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:05,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:05,628 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:05,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:05,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:05,629 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756190409] [2020-09-17 02:40:05,629 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:05,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:05,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:05,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:05,630 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:06,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:06,731 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-09-17 02:40:06,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:40:06,733 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:06,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:06,733 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:40:06,733 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:40:06,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:40:06,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:40:06,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-09-17 02:40:06,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:06,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:06,738 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:06,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:06,738 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:06,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:06,738 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:06,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:06,739 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:06,739 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:06,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-17 02:40:06,947 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:06,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:06,948 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-09-17 02:40:06,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:06,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417598270] [2020-09-17 02:40:06,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:06,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:07,456 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:07,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417598270] [2020-09-17 02:40:07,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145753167] [2020-09-17 02:40:07,457 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:07,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:40:07,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:07,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:07,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:07,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:07,587 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:07,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:07,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:07,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530292103] [2020-09-17 02:40:07,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:07,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:07,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:07,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:07,588 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:08,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:08,934 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-09-17 02:40:08,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:40:08,936 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:08,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:08,936 INFO L225 Difference]: With dead ends: 133 [2020-09-17 02:40:08,937 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 02:40:08,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:40:08,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 02:40:08,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-09-17 02:40:08,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:08,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:08,940 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:08,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:08,940 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:08,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:08,940 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:08,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:08,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:08,941 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:09,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-17 02:40:09,145 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:09,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:09,146 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-09-17 02:40:09,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:09,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978612208] [2020-09-17 02:40:09,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:09,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:09,633 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:09,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978612208] [2020-09-17 02:40:09,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374634337] [2020-09-17 02:40:09,633 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:09,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:09,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:09,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:09,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:09,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:09,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586541968] [2020-09-17 02:40:09,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:09,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:09,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:09,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:09,722 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:10,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:10,913 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-09-17 02:40:10,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:40:10,914 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:10,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:10,915 INFO L225 Difference]: With dead ends: 130 [2020-09-17 02:40:10,915 INFO L226 Difference]: Without dead ends: 124 [2020-09-17 02:40:10,915 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:40:10,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-17 02:40:10,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-09-17 02:40:10,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:10,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:10,917 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:10,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:10,918 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:10,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:10,918 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:10,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:10,918 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:10,918 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:11,118 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:11,120 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:11,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:11,120 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-09-17 02:40:11,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:11,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946947221] [2020-09-17 02:40:11,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:11,600 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:11,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946947221] [2020-09-17 02:40:11,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283334144] [2020-09-17 02:40:11,601 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:11,673 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:40:11,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:11,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:11,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:11,714 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:11,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:11,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:11,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765784744] [2020-09-17 02:40:11,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:11,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:11,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:11,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:11,734 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:13,203 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-09-17 02:40:13,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:40:13,204 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:13,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:13,205 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:40:13,205 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:40:13,206 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:40:13,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:40:13,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-09-17 02:40:13,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:13,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:13,209 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:13,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:13,209 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:13,209 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:13,209 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:13,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:13,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:13,210 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:13,410 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-17 02:40:13,410 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:13,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:13,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-09-17 02:40:13,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:13,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417954166] [2020-09-17 02:40:13,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:13,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:13,889 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:13,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417954166] [2020-09-17 02:40:13,890 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1847391278] [2020-09-17 02:40:13,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:13,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:40:13,966 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:13,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:13,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:13,993 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:13,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:13,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:13,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386690703] [2020-09-17 02:40:13,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:13,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:13,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:13,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:13,995 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:15,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:15,303 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-09-17 02:40:15,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:40:15,304 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:15,305 INFO L225 Difference]: With dead ends: 126 [2020-09-17 02:40:15,305 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 02:40:15,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:40:15,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 02:40:15,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-09-17 02:40:15,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:15,308 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:15,308 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:15,308 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:15,308 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:15,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:15,308 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:15,308 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:15,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:15,509 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:15,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:15,510 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-09-17 02:40:15,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:15,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2017456515] [2020-09-17 02:40:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:15,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:15,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2017456515] [2020-09-17 02:40:15,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868567876] [2020-09-17 02:40:15,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:16,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:40:16,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:16,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:16,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:16,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:16,114 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:16,114 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:16,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117426087] [2020-09-17 02:40:16,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:16,114 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:16,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:16,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:16,115 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:17,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:17,721 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-09-17 02:40:17,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:40:17,723 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:17,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:17,723 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:40:17,723 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 02:40:17,724 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:40:17,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 02:40:17,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-09-17 02:40:17,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:17,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:17,726 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:17,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:17,727 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:17,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:17,727 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:17,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:17,727 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:17,727 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:17,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-09-17 02:40:17,930 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:17,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:17,930 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-09-17 02:40:17,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:17,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350420788] [2020-09-17 02:40:17,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:18,388 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:18,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350420788] [2020-09-17 02:40:18,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390744847] [2020-09-17 02:40:18,389 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:18,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:40:18,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:18,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:18,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:18,497 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:18,498 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:18,498 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:18,498 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363234080] [2020-09-17 02:40:18,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:18,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:18,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:18,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:18,499 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:19,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:19,866 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-09-17 02:40:19,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:40:19,868 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:19,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:19,868 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:40:19,868 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 02:40:19,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:40:19,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 02:40:19,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-09-17 02:40:19,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:19,872 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:19,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:19,872 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:19,872 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:19,872 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:19,872 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:19,872 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:20,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:20,073 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:20,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:20,074 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-09-17 02:40:20,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:20,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792087852] [2020-09-17 02:40:20,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:20,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:20,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792087852] [2020-09-17 02:40:20,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738003921] [2020-09-17 02:40:20,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:20,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:40:20,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:20,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:20,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:20,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:20,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:20,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:20,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088262161] [2020-09-17 02:40:20,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:20,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:20,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:20,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:20,675 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:22,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:22,400 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-09-17 02:40:22,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:40:22,401 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:22,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:22,401 INFO L225 Difference]: With dead ends: 121 [2020-09-17 02:40:22,401 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 02:40:22,402 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:40:22,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 02:40:22,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-09-17 02:40:22,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:22,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:22,404 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:22,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:22,405 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:22,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:22,405 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:22,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:22,405 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:22,405 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:22,606 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-09-17 02:40:22,606 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:22,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:22,607 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-09-17 02:40:22,607 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:22,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609592654] [2020-09-17 02:40:22,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:22,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:23,052 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:23,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609592654] [2020-09-17 02:40:23,053 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758364659] [2020-09-17 02:40:23,053 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:23,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:23,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:23,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:23,146 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:23,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:23,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:23,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199659275] [2020-09-17 02:40:23,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:23,147 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:23,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:23,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:23,147 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:24,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:24,656 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-09-17 02:40:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:40:24,657 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:24,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:24,658 INFO L225 Difference]: With dead ends: 118 [2020-09-17 02:40:24,658 INFO L226 Difference]: Without dead ends: 112 [2020-09-17 02:40:24,659 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:40:24,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-17 02:40:24,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-09-17 02:40:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:24,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:24,661 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:24,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:24,661 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:24,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:24,661 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:24,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:24,662 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:24,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:24,863 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:24,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:24,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-09-17 02:40:24,863 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:24,864 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269897347] [2020-09-17 02:40:24,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:25,312 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:25,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269897347] [2020-09-17 02:40:25,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213684131] [2020-09-17 02:40:25,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:25,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:40:25,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:25,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:25,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:25,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:25,435 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:25,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:25,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:25,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628557524] [2020-09-17 02:40:25,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:25,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:25,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:25,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:25,437 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:27,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:27,345 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-09-17 02:40:27,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:40:27,346 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:27,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:27,347 INFO L225 Difference]: With dead ends: 117 [2020-09-17 02:40:27,347 INFO L226 Difference]: Without dead ends: 111 [2020-09-17 02:40:27,347 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:40:27,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-17 02:40:27,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-09-17 02:40:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:27,349 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:27,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:27,349 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:27,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:27,349 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:27,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:27,350 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:27,350 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:27,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:27,550 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:27,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:27,551 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-09-17 02:40:27,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:27,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137391688] [2020-09-17 02:40:27,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:27,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:27,990 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:27,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137391688] [2020-09-17 02:40:27,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190977298] [2020-09-17 02:40:27,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:28,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:40:28,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:28,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:28,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:28,095 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:28,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:28,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:28,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276612947] [2020-09-17 02:40:28,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:28,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:28,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:28,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:28,097 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:29,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:29,707 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-09-17 02:40:29,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:40:29,709 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:29,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:29,709 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:40:29,710 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:40:29,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:40:29,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:40:29,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-09-17 02:40:29,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:29,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:29,714 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:29,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:29,714 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:29,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:29,714 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:29,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:29,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:29,715 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:29,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-17 02:40:29,916 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:29,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-09-17 02:40:29,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:29,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052911996] [2020-09-17 02:40:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:30,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052911996] [2020-09-17 02:40:30,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960975779] [2020-09-17 02:40:30,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:30,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:40:30,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:30,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:30,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:30,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:30,495 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:30,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:30,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:30,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305694558] [2020-09-17 02:40:30,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:30,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:30,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:30,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:30,497 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:32,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:32,552 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-17 02:40:32,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:40:32,553 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:32,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:32,554 INFO L225 Difference]: With dead ends: 113 [2020-09-17 02:40:32,554 INFO L226 Difference]: Without dead ends: 107 [2020-09-17 02:40:32,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:40:32,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-17 02:40:32,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-09-17 02:40:32,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:32,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:32,557 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:32,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:32,557 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:32,557 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:32,557 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:32,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:32,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:32,558 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:32,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-09-17 02:40:32,758 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:32,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:32,759 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-09-17 02:40:32,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:32,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867255583] [2020-09-17 02:40:32,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:33,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867255583] [2020-09-17 02:40:33,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898961175] [2020-09-17 02:40:33,198 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:33,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-17 02:40:33,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:33,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:33,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:33,299 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:33,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:33,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:33,300 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790545820] [2020-09-17 02:40:33,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:33,300 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:33,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:33,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:33,301 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:35,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:35,054 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-09-17 02:40:35,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:40:35,056 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:35,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:35,056 INFO L225 Difference]: With dead ends: 110 [2020-09-17 02:40:35,057 INFO L226 Difference]: Without dead ends: 104 [2020-09-17 02:40:35,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:40:35,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-17 02:40:35,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-09-17 02:40:35,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:40:35,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:40:35,059 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-17 02:40:35,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:35,059 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:40:35,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:35,059 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:40:35,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:35,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:35,060 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:35,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-17 02:40:35,261 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:35,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:35,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-09-17 02:40:35,261 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:35,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32354447] [2020-09-17 02:40:35,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:35,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:35,702 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:35,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32354447] [2020-09-17 02:40:35,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815420265] [2020-09-17 02:40:35,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:35,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-17 02:40:35,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:35,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:35,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:35,817 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:35,852 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:35,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:35,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:35,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133925841] [2020-09-17 02:40:35,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:35,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:35,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:35,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:35,854 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-17 02:40:38,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:38,066 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-09-17 02:40:38,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:40:38,068 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:38,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:38,069 INFO L225 Difference]: With dead ends: 109 [2020-09-17 02:40:38,069 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:40:38,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 02:40:38,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:40:38,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-09-17 02:40:38,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:40:38,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:40:38,071 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-17 02:40:38,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:38,072 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:40:38,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:38,072 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:40:38,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:38,072 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:38,072 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:38,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-17 02:40:38,273 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:38,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:38,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-09-17 02:40:38,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:38,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649506310] [2020-09-17 02:40:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:38,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:38,722 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:38,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649506310] [2020-09-17 02:40:38,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670204385] [2020-09-17 02:40:38,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:38,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:38,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:38,833 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:38,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:38,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-17 02:40:38,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200403156] [2020-09-17 02:40:38,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-17 02:40:38,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:38,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-17 02:40:38,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-17 02:40:38,835 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-17 02:40:40,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:40,665 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-09-17 02:40:40,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:40:40,667 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-17 02:40:40,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:40,667 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:40:40,668 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 02:40:40,668 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:40:40,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 02:40:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-09-17 02:40:40,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 02:40:40,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-09-17 02:40:40,671 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-09-17 02:40:40,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:40,671 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-09-17 02:40:40,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-17 02:40:40,671 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-09-17 02:40:40,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:40,671 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:40,671 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:40,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-17 02:40:40,872 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:40,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:40,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-09-17 02:40:40,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:40,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805821931] [2020-09-17 02:40:40,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:40,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:41,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805821931] [2020-09-17 02:40:41,323 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536694970] [2020-09-17 02:40:41,324 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:41,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:40:41,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:41,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:40:41,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:41,459 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:41,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:41,460 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:41,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988897644] [2020-09-17 02:40:41,461 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:41,461 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:41,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:41,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:41,461 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-09-17 02:40:43,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:43,512 INFO L93 Difference]: Finished difference Result 104 states and 261 transitions. [2020-09-17 02:40:43,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:40:43,513 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:43,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:43,514 INFO L225 Difference]: With dead ends: 104 [2020-09-17 02:40:43,514 INFO L226 Difference]: Without dead ends: 96 [2020-09-17 02:40:43,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 02:40:43,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-17 02:40:43,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2020-09-17 02:40:43,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-17 02:40:43,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-09-17 02:40:43,516 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-09-17 02:40:43,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:43,517 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-09-17 02:40:43,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:43,517 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-09-17 02:40:43,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-17 02:40:43,517 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:43,517 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:43,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:43,718 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:43,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:43,718 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-09-17 02:40:43,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:43,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640363991] [2020-09-17 02:40:43,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:44,159 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:44,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640363991] [2020-09-17 02:40:44,159 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393922064] [2020-09-17 02:40:44,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:44,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-17 02:40:44,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:44,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-17 02:40:44,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:44,278 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:40:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:44,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:44,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-17 02:40:44,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559118704] [2020-09-17 02:40:44,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:44,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:44,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:44,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:44,311 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-09-17 02:40:46,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:46,448 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-09-17 02:40:46,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:40:46,449 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-17 02:40:46,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:46,449 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:40:46,449 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 02:40:46,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 02:40:46,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 02:40:46,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-09-17 02:40:46,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:40:46,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-09-17 02:40:46,452 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-09-17 02:40:46,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:46,452 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-09-17 02:40:46,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:46,452 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-09-17 02:40:46,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:40:46,453 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:46,453 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:46,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-17 02:40:46,654 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:46,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:46,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-09-17 02:40:46,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:46,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890091507] [2020-09-17 02:40:46,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:46,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:47,132 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:47,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890091507] [2020-09-17 02:40:47,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079205974] [2020-09-17 02:40:47,133 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:47,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:40:47,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:47,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:40:47,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:47,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:40:47,278 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:47,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:47,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:40:47,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908586550] [2020-09-17 02:40:47,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:40:47,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:47,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:40:47,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:40:47,287 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 26 states. [2020-09-17 02:40:49,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:49,581 INFO L93 Difference]: Finished difference Result 102 states and 261 transitions. [2020-09-17 02:40:49,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:40:49,582 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:40:49,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:49,583 INFO L225 Difference]: With dead ends: 102 [2020-09-17 02:40:49,583 INFO L226 Difference]: Without dead ends: 97 [2020-09-17 02:40:49,583 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1409, Invalid=3013, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 02:40:49,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-17 02:40:49,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2020-09-17 02:40:49,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-17 02:40:49,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 172 transitions. [2020-09-17 02:40:49,585 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 172 transitions. Word has length 29 [2020-09-17 02:40:49,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:49,585 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 172 transitions. [2020-09-17 02:40:49,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:40:49,585 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 172 transitions. [2020-09-17 02:40:49,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:40:49,586 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:49,586 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:49,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:49,794 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:49,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:49,795 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-09-17 02:40:49,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:49,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286287131] [2020-09-17 02:40:49,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:49,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:50,464 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:50,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286287131] [2020-09-17 02:40:50,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142601461] [2020-09-17 02:40:50,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:50,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:40:50,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:50,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:40:50,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:50,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:50,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:40:50,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53388173] [2020-09-17 02:40:50,552 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:50,552 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:50,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=442, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:50,553 INFO L87 Difference]: Start difference. First operand 70 states and 172 transitions. Second operand 25 states. [2020-09-17 02:40:51,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:51,522 INFO L93 Difference]: Finished difference Result 108 states and 251 transitions. [2020-09-17 02:40:51,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-17 02:40:51,523 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:40:51,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:51,524 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:40:51,524 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 02:40:51,525 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2020-09-17 02:40:51,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 02:40:51,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 78. [2020-09-17 02:40:51,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:40:51,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 191 transitions. [2020-09-17 02:40:51,527 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 191 transitions. Word has length 29 [2020-09-17 02:40:51,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:51,527 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 191 transitions. [2020-09-17 02:40:51,527 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:51,528 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 191 transitions. [2020-09-17 02:40:51,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:40:51,528 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:51,528 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:51,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:51,735 INFO L427 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:51,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:51,736 INFO L82 PathProgramCache]: Analyzing trace with hash -972903182, now seen corresponding path program 240 times [2020-09-17 02:40:51,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:51,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946392094] [2020-09-17 02:40:51,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:52,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946392094] [2020-09-17 02:40:52,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876852204] [2020-09-17 02:40:52,366 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:52,438 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:40:52,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:52,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:40:52,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:52,477 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:52,493 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:52,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:52,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:40:52,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973909932] [2020-09-17 02:40:52,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:40:52,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:52,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:40:52,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:40:52,495 INFO L87 Difference]: Start difference. First operand 78 states and 191 transitions. Second operand 26 states. [2020-09-17 02:40:53,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:53,559 INFO L93 Difference]: Finished difference Result 130 states and 295 transitions. [2020-09-17 02:40:53,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-17 02:40:53,560 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:40:53,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:53,561 INFO L225 Difference]: With dead ends: 130 [2020-09-17 02:40:53,572 INFO L226 Difference]: Without dead ends: 124 [2020-09-17 02:40:53,572 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=672, Invalid=1584, Unknown=0, NotChecked=0, Total=2256 [2020-09-17 02:40:53,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-17 02:40:53,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 76. [2020-09-17 02:40:53,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-17 02:40:53,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2020-09-17 02:40:53,574 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 29 [2020-09-17 02:40:53,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:53,574 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2020-09-17 02:40:53,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:40:53,574 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2020-09-17 02:40:53,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:40:53,574 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:53,575 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:53,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:53,775 INFO L427 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:53,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:53,776 INFO L82 PathProgramCache]: Analyzing trace with hash -558119952, now seen corresponding path program 241 times [2020-09-17 02:40:53,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:53,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528292563] [2020-09-17 02:40:53,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:54,386 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:54,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528292563] [2020-09-17 02:40:54,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [424728394] [2020-09-17 02:40:54,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:54,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:40:54,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:54,472 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:54,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:54,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:40:54,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997295837] [2020-09-17 02:40:54,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:54,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:54,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:54,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:54,473 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand 25 states. [2020-09-17 02:40:55,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:55,628 INFO L93 Difference]: Finished difference Result 131 states and 299 transitions. [2020-09-17 02:40:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:40:55,629 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:40:55,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:55,630 INFO L225 Difference]: With dead ends: 131 [2020-09-17 02:40:55,630 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:40:55,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=674, Invalid=1678, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:40:55,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:40:55,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 79. [2020-09-17 02:40:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-17 02:40:55,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-09-17 02:40:55,633 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 29 [2020-09-17 02:40:55,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:55,633 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-09-17 02:40:55,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:55,633 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-09-17 02:40:55,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:40:55,633 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:55,633 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:55,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:55,834 INFO L427 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:55,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:55,835 INFO L82 PathProgramCache]: Analyzing trace with hash 2015097940, now seen corresponding path program 242 times [2020-09-17 02:40:55,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:55,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [157636935] [2020-09-17 02:40:55,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:55,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:56,480 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:56,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [157636935] [2020-09-17 02:40:56,480 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055037270] [2020-09-17 02:40:56,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:56,550 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:40:56,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:56,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:40:56,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:56,596 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:40:56,614 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:56,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:56,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:40:56,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404273219] [2020-09-17 02:40:56,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:40:56,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:56,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:40:56,616 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:40:56,616 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 26 states. [2020-09-17 02:40:57,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:57,844 INFO L93 Difference]: Finished difference Result 149 states and 335 transitions. [2020-09-17 02:40:57,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:40:57,845 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:40:57,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:57,846 INFO L225 Difference]: With dead ends: 149 [2020-09-17 02:40:57,846 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 02:40:57,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 518 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=712, Invalid=1838, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:40:57,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 02:40:57,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 78. [2020-09-17 02:40:57,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:40:57,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 193 transitions. [2020-09-17 02:40:57,848 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 193 transitions. Word has length 29 [2020-09-17 02:40:57,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:57,848 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 193 transitions. [2020-09-17 02:40:57,848 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:40:57,848 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 193 transitions. [2020-09-17 02:40:57,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:40:57,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:57,848 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:40:58,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-09-17 02:40:58,049 INFO L427 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:40:58,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:40:58,050 INFO L82 PathProgramCache]: Analyzing trace with hash 831173330, now seen corresponding path program 243 times [2020-09-17 02:40:58,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:40:58,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359307447] [2020-09-17 02:40:58,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:40:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:40:58,624 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:58,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359307447] [2020-09-17 02:40:58,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984406838] [2020-09-17 02:40:58,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:40:58,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 02:40:58,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:40:58,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:40:58,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:40:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:40:58,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:40:58,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:40:58,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816570764] [2020-09-17 02:40:58,719 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:40:58,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:40:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:40:58,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:40:58,720 INFO L87 Difference]: Start difference. First operand 78 states and 193 transitions. Second operand 25 states. [2020-09-17 02:40:59,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:40:59,960 INFO L93 Difference]: Finished difference Result 149 states and 337 transitions. [2020-09-17 02:40:59,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:40:59,962 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:40:59,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:40:59,962 INFO L225 Difference]: With dead ends: 149 [2020-09-17 02:40:59,962 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 02:40:59,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=728, Invalid=1924, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:40:59,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 02:40:59,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 81. [2020-09-17 02:40:59,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-17 02:40:59,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 201 transitions. [2020-09-17 02:40:59,965 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 201 transitions. Word has length 29 [2020-09-17 02:40:59,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:40:59,965 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 201 transitions. [2020-09-17 02:40:59,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:40:59,965 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 201 transitions. [2020-09-17 02:40:59,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:40:59,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:40:59,966 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:00,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 241 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable244 [2020-09-17 02:41:00,167 INFO L427 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:00,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:00,167 INFO L82 PathProgramCache]: Analyzing trace with hash -716985290, now seen corresponding path program 244 times [2020-09-17 02:41:00,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:00,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782590912] [2020-09-17 02:41:00,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:00,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782590912] [2020-09-17 02:41:00,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543221013] [2020-09-17 02:41:00,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:00,832 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:41:00,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:00,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:00,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:00,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:00,890 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:00,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:00,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:00,891 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451786855] [2020-09-17 02:41:00,891 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:00,891 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:00,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:00,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:00,892 INFO L87 Difference]: Start difference. First operand 81 states and 201 transitions. Second operand 26 states. [2020-09-17 02:41:02,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:02,283 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-09-17 02:41:02,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:41:02,284 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:02,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:02,285 INFO L225 Difference]: With dead ends: 146 [2020-09-17 02:41:02,285 INFO L226 Difference]: Without dead ends: 140 [2020-09-17 02:41:02,285 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=731, Invalid=2025, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:41:02,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-17 02:41:02,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 80. [2020-09-17 02:41:02,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:41:02,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2020-09-17 02:41:02,288 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 29 [2020-09-17 02:41:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:02,288 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2020-09-17 02:41:02,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2020-09-17 02:41:02,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:02,288 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:02,289 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:02,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 242 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-09-17 02:41:02,492 INFO L427 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:02,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:02,493 INFO L82 PathProgramCache]: Analyzing trace with hash -2018774476, now seen corresponding path program 245 times [2020-09-17 02:41:02,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:02,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677349294] [2020-09-17 02:41:02,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:02,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:03,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677349294] [2020-09-17 02:41:03,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994050526] [2020-09-17 02:41:03,057 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:03,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:41:03,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:03,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:03,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:03,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:03,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:03,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832113207] [2020-09-17 02:41:03,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:03,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:03,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:03,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:03,152 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand 25 states. [2020-09-17 02:41:04,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:04,515 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-09-17 02:41:04,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:41:04,516 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:04,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:04,517 INFO L225 Difference]: With dead ends: 147 [2020-09-17 02:41:04,517 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 02:41:04,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=762, Invalid=2100, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:41:04,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 02:41:04,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 83. [2020-09-17 02:41:04,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 02:41:04,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 207 transitions. [2020-09-17 02:41:04,519 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 207 transitions. Word has length 29 [2020-09-17 02:41:04,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:04,519 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 207 transitions. [2020-09-17 02:41:04,519 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:04,519 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 207 transitions. [2020-09-17 02:41:04,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:04,520 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:04,520 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:04,720 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-09-17 02:41:04,721 INFO L427 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:04,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:04,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1465644184, now seen corresponding path program 246 times [2020-09-17 02:41:04,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:04,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426916650] [2020-09-17 02:41:04,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:04,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:05,301 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:05,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426916650] [2020-09-17 02:41:05,301 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009326304] [2020-09-17 02:41:05,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:05,377 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:41:05,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:05,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:05,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:05,418 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:05,437 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:05,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:05,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:05,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598961527] [2020-09-17 02:41:05,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:05,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:05,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:05,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:05,438 INFO L87 Difference]: Start difference. First operand 83 states and 207 transitions. Second operand 26 states. [2020-09-17 02:41:06,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:06,953 INFO L93 Difference]: Finished difference Result 144 states and 329 transitions. [2020-09-17 02:41:06,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:41:06,955 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:06,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:06,955 INFO L225 Difference]: With dead ends: 144 [2020-09-17 02:41:06,956 INFO L226 Difference]: Without dead ends: 138 [2020-09-17 02:41:06,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 649 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=766, Invalid=2204, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:41:06,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-17 02:41:06,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 82. [2020-09-17 02:41:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:41:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 205 transitions. [2020-09-17 02:41:06,959 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 205 transitions. Word has length 29 [2020-09-17 02:41:06,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:06,959 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 205 transitions. [2020-09-17 02:41:06,959 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:06,959 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 205 transitions. [2020-09-17 02:41:06,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:06,959 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:06,959 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:07,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:07,160 INFO L427 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:07,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1517920790, now seen corresponding path program 247 times [2020-09-17 02:41:07,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:07,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019276634] [2020-09-17 02:41:07,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:07,741 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:07,741 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019276634] [2020-09-17 02:41:07,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957585857] [2020-09-17 02:41:07,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:07,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:07,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:07,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:07,842 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:07,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:07,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:07,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213208742] [2020-09-17 02:41:07,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:07,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:07,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:07,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:07,844 INFO L87 Difference]: Start difference. First operand 82 states and 205 transitions. Second operand 25 states. [2020-09-17 02:41:09,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:09,282 INFO L93 Difference]: Finished difference Result 145 states and 333 transitions. [2020-09-17 02:41:09,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:41:09,283 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:09,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:09,284 INFO L225 Difference]: With dead ends: 145 [2020-09-17 02:41:09,284 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 02:41:09,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 715 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=812, Invalid=2268, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:41:09,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 02:41:09,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 85. [2020-09-17 02:41:09,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 02:41:09,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 213 transitions. [2020-09-17 02:41:09,286 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 213 transitions. Word has length 29 [2020-09-17 02:41:09,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:09,286 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 213 transitions. [2020-09-17 02:41:09,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:09,287 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 213 transitions. [2020-09-17 02:41:09,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:09,287 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:09,288 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:09,494 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2020-09-17 02:41:09,495 INFO L427 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:09,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:09,495 INFO L82 PathProgramCache]: Analyzing trace with hash -900797062, now seen corresponding path program 248 times [2020-09-17 02:41:09,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:09,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492226389] [2020-09-17 02:41:09,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:09,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:10,057 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:10,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492226389] [2020-09-17 02:41:10,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458870312] [2020-09-17 02:41:10,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:10,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:41:10,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:10,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:10,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:10,172 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:10,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:10,193 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:10,193 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979064838] [2020-09-17 02:41:10,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:10,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:10,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:10,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:10,194 INFO L87 Difference]: Start difference. First operand 85 states and 213 transitions. Second operand 26 states. [2020-09-17 02:41:11,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:11,846 INFO L93 Difference]: Finished difference Result 142 states and 327 transitions. [2020-09-17 02:41:11,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:41:11,847 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:11,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:11,847 INFO L225 Difference]: With dead ends: 142 [2020-09-17 02:41:11,847 INFO L226 Difference]: Without dead ends: 136 [2020-09-17 02:41:11,848 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 731 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=817, Invalid=2375, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:41:11,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-17 02:41:11,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 84. [2020-09-17 02:41:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 02:41:11,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 211 transitions. [2020-09-17 02:41:11,850 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 211 transitions. Word has length 29 [2020-09-17 02:41:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:11,850 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 211 transitions. [2020-09-17 02:41:11,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 211 transitions. [2020-09-17 02:41:11,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:11,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:11,851 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:12,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:12,052 INFO L427 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:12,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:12,052 INFO L82 PathProgramCache]: Analyzing trace with hash -212475272, now seen corresponding path program 249 times [2020-09-17 02:41:12,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:12,053 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734699353] [2020-09-17 02:41:12,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:12,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:12,577 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:12,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734699353] [2020-09-17 02:41:12,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324586509] [2020-09-17 02:41:12,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:12,651 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 02:41:12,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:12,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:12,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:12,690 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:12,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:12,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:12,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41287345] [2020-09-17 02:41:12,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:12,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:12,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:12,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=497, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:12,692 INFO L87 Difference]: Start difference. First operand 84 states and 211 transitions. Second operand 25 states. [2020-09-17 02:41:14,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:14,206 INFO L93 Difference]: Finished difference Result 143 states and 331 transitions. [2020-09-17 02:41:14,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:41:14,207 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:14,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:14,208 INFO L225 Difference]: With dead ends: 143 [2020-09-17 02:41:14,208 INFO L226 Difference]: Without dead ends: 137 [2020-09-17 02:41:14,208 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 805 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=878, Invalid=2428, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:41:14,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-17 02:41:14,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 87. [2020-09-17 02:41:14,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:41:14,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 219 transitions. [2020-09-17 02:41:14,210 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 219 transitions. Word has length 29 [2020-09-17 02:41:14,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:14,210 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 219 transitions. [2020-09-17 02:41:14,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:14,210 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 219 transitions. [2020-09-17 02:41:14,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:14,211 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:14,211 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:14,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:14,412 INFO L427 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:14,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:14,412 INFO L82 PathProgramCache]: Analyzing trace with hash 772716252, now seen corresponding path program 250 times [2020-09-17 02:41:14,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:14,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376639441] [2020-09-17 02:41:14,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:14,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:14,947 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:14,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376639441] [2020-09-17 02:41:14,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066366475] [2020-09-17 02:41:14,948 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:15,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:41:15,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:15,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:15,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:15,055 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:15,077 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:15,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:15,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:15,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224052614] [2020-09-17 02:41:15,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:15,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:15,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:15,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:15,079 INFO L87 Difference]: Start difference. First operand 87 states and 219 transitions. Second operand 26 states. [2020-09-17 02:41:16,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:16,890 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2020-09-17 02:41:16,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:41:16,894 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:16,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:16,895 INFO L225 Difference]: With dead ends: 140 [2020-09-17 02:41:16,895 INFO L226 Difference]: Without dead ends: 134 [2020-09-17 02:41:16,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=884, Invalid=2538, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:41:16,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-17 02:41:16,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 86. [2020-09-17 02:41:16,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:41:16,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 217 transitions. [2020-09-17 02:41:16,897 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 217 transitions. Word has length 29 [2020-09-17 02:41:16,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:16,898 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 217 transitions. [2020-09-17 02:41:16,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:16,898 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 217 transitions. [2020-09-17 02:41:16,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:16,898 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:16,898 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:17,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:17,106 INFO L427 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:17,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:17,107 INFO L82 PathProgramCache]: Analyzing trace with hash -844442790, now seen corresponding path program 251 times [2020-09-17 02:41:17,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:17,107 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866675114] [2020-09-17 02:41:17,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:17,644 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:17,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866675114] [2020-09-17 02:41:17,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815371483] [2020-09-17 02:41:17,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:17,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:41:17,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:17,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:17,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:17,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:17,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:17,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634769012] [2020-09-17 02:41:17,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:17,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:17,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:17,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:17,758 INFO L87 Difference]: Start difference. First operand 86 states and 217 transitions. Second operand 25 states. [2020-09-17 02:41:19,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:19,402 INFO L93 Difference]: Finished difference Result 141 states and 329 transitions. [2020-09-17 02:41:19,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:41:19,404 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:19,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:19,405 INFO L225 Difference]: With dead ends: 141 [2020-09-17 02:41:19,405 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 02:41:19,405 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=960, Invalid=2580, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:41:19,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 02:41:19,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 89. [2020-09-17 02:41:19,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 02:41:19,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-09-17 02:41:19,408 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 29 [2020-09-17 02:41:19,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:19,408 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-09-17 02:41:19,408 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:19,408 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-09-17 02:41:19,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:19,408 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:19,408 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:19,609 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,249 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:19,609 INFO L427 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:19,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:19,610 INFO L82 PathProgramCache]: Analyzing trace with hash 412446910, now seen corresponding path program 252 times [2020-09-17 02:41:19,610 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:19,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859027104] [2020-09-17 02:41:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:20,132 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:20,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859027104] [2020-09-17 02:41:20,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1994285093] [2020-09-17 02:41:20,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:20,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:41:20,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:20,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:20,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:20,252 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:20,276 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:20,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:20,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:20,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710432095] [2020-09-17 02:41:20,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:20,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:20,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:20,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=546, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:20,277 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 26 states. [2020-09-17 02:41:22,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:22,230 INFO L93 Difference]: Finished difference Result 138 states and 323 transitions. [2020-09-17 02:41:22,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:41:22,231 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:22,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:22,232 INFO L225 Difference]: With dead ends: 138 [2020-09-17 02:41:22,232 INFO L226 Difference]: Without dead ends: 132 [2020-09-17 02:41:22,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 909 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=967, Invalid=2693, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:41:22,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-17 02:41:22,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 88. [2020-09-17 02:41:22,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:41:22,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 223 transitions. [2020-09-17 02:41:22,235 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 223 transitions. Word has length 29 [2020-09-17 02:41:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:22,235 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 223 transitions. [2020-09-17 02:41:22,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 223 transitions. [2020-09-17 02:41:22,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:22,236 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:22,236 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:22,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,250 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:22,438 INFO L427 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:22,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:22,439 INFO L82 PathProgramCache]: Analyzing trace with hash 2028639420, now seen corresponding path program 253 times [2020-09-17 02:41:22,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:22,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137729158] [2020-09-17 02:41:22,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:22,943 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:22,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137729158] [2020-09-17 02:41:22,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611058467] [2020-09-17 02:41:22,944 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:23,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:23,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:23,045 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:23,045 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:23,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:23,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044472906] [2020-09-17 02:41:23,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:23,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:23,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:23,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:23,046 INFO L87 Difference]: Start difference. First operand 88 states and 223 transitions. Second operand 25 states. [2020-09-17 02:41:24,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:24,804 INFO L93 Difference]: Finished difference Result 139 states and 327 transitions. [2020-09-17 02:41:24,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:41:24,805 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:24,806 INFO L225 Difference]: With dead ends: 139 [2020-09-17 02:41:24,806 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:41:24,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 997 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1058, Invalid=2724, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:41:24,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:41:24,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 91. [2020-09-17 02:41:24,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 02:41:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 231 transitions. [2020-09-17 02:41:24,808 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 231 transitions. Word has length 29 [2020-09-17 02:41:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:24,809 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 231 transitions. [2020-09-17 02:41:24,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 231 transitions. [2020-09-17 02:41:24,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:24,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:24,809 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:25,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2020-09-17 02:41:25,015 INFO L427 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:25,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:25,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1746584800, now seen corresponding path program 254 times [2020-09-17 02:41:25,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:25,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419871786] [2020-09-17 02:41:25,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:25,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:25,532 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:25,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419871786] [2020-09-17 02:41:25,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010988519] [2020-09-17 02:41:25,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:25,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:41:25,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:25,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:25,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:25,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:25,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:25,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:25,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447845534] [2020-09-17 02:41:25,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:25,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:25,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:25,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:25,678 INFO L87 Difference]: Start difference. First operand 91 states and 231 transitions. Second operand 26 states. [2020-09-17 02:41:27,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:27,795 INFO L93 Difference]: Finished difference Result 136 states and 321 transitions. [2020-09-17 02:41:27,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:41:27,798 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:27,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:27,798 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:41:27,799 INFO L226 Difference]: Without dead ends: 130 [2020-09-17 02:41:27,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1066, Invalid=2840, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:41:27,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-17 02:41:27,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 90. [2020-09-17 02:41:27,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 02:41:27,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-09-17 02:41:27,801 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 29 [2020-09-17 02:41:27,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:27,802 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-09-17 02:41:27,802 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:27,802 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-09-17 02:41:27,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:27,803 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:27,803 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:28,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-09-17 02:41:28,009 INFO L427 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:28,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:28,009 INFO L82 PathProgramCache]: Analyzing trace with hash -91273570, now seen corresponding path program 255 times [2020-09-17 02:41:28,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:28,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338218065] [2020-09-17 02:41:28,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:28,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:28,514 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:28,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338218065] [2020-09-17 02:41:28,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517915511] [2020-09-17 02:41:28,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:28,587 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 02:41:28,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:28,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:28,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:28,624 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:28,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:28,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:28,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831388644] [2020-09-17 02:41:28,625 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:28,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:28,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:28,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:28,626 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 25 states. [2020-09-17 02:41:30,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:30,462 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-09-17 02:41:30,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:41:30,463 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:30,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:30,464 INFO L225 Difference]: With dead ends: 137 [2020-09-17 02:41:30,464 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:41:30,464 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1099 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1172, Invalid=2860, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 02:41:30,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:41:30,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 93. [2020-09-17 02:41:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:41:30,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-17 02:41:30,467 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 29 [2020-09-17 02:41:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:30,467 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-17 02:41:30,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:30,468 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-17 02:41:30,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:30,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:30,468 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:30,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 253 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-09-17 02:41:30,669 INFO L427 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:30,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:30,670 INFO L82 PathProgramCache]: Analyzing trace with hash -1811401214, now seen corresponding path program 256 times [2020-09-17 02:41:30,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:30,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910878301] [2020-09-17 02:41:30,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:31,166 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:31,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910878301] [2020-09-17 02:41:31,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856145618] [2020-09-17 02:41:31,167 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:31,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:41:31,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:31,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:31,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:31,288 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:31,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:31,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:31,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390562801] [2020-09-17 02:41:31,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:31,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:31,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:31,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:31,316 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 26 states. [2020-09-17 02:41:33,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:33,564 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-09-17 02:41:33,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:41:33,565 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:33,565 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:41:33,566 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:41:33,566 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1103 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1181, Invalid=2979, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 02:41:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:41:33,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 92. [2020-09-17 02:41:33,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:41:33,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-17 02:41:33,568 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 29 [2020-09-17 02:41:33,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:33,568 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-17 02:41:33,568 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:33,568 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-17 02:41:33,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:33,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:33,569 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:33,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable257,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:33,770 INFO L427 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:33,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:33,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1340405504, now seen corresponding path program 257 times [2020-09-17 02:41:33,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:33,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731223786] [2020-09-17 02:41:33,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:34,279 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:34,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731223786] [2020-09-17 02:41:34,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994312562] [2020-09-17 02:41:34,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:34,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:41:34,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:34,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:34,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:34,391 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:34,391 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:34,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:34,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695559880] [2020-09-17 02:41:34,392 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:34,392 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:34,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:34,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:34,392 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 25 states. [2020-09-17 02:41:36,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:36,371 INFO L93 Difference]: Finished difference Result 135 states and 323 transitions. [2020-09-17 02:41:36,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-17 02:41:36,372 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:36,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:36,372 INFO L225 Difference]: With dead ends: 135 [2020-09-17 02:41:36,373 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 02:41:36,373 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1205 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1302, Invalid=2988, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 02:41:36,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 02:41:36,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 95. [2020-09-17 02:41:36,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 02:41:36,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 243 transitions. [2020-09-17 02:41:36,376 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 243 transitions. Word has length 29 [2020-09-17 02:41:36,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:36,376 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 243 transitions. [2020-09-17 02:41:36,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:36,376 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 243 transitions. [2020-09-17 02:41:36,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:36,376 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:36,376 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:36,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-09-17 02:41:36,577 INFO L427 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:36,578 INFO L82 PathProgramCache]: Analyzing trace with hash -1324318364, now seen corresponding path program 258 times [2020-09-17 02:41:36,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:36,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359992969] [2020-09-17 02:41:36,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:37,109 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:37,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359992969] [2020-09-17 02:41:37,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [973791969] [2020-09-17 02:41:37,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:37,187 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:41:37,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:37,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:37,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:37,233 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:37,264 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:37,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:37,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:37,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006399903] [2020-09-17 02:41:37,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:37,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:37,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:37,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=516, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:37,266 INFO L87 Difference]: Start difference. First operand 95 states and 243 transitions. Second operand 26 states. [2020-09-17 02:41:39,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:39,719 INFO L93 Difference]: Finished difference Result 132 states and 317 transitions. [2020-09-17 02:41:39,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 02:41:39,721 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:39,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:39,721 INFO L225 Difference]: With dead ends: 132 [2020-09-17 02:41:39,722 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 02:41:39,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1206 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1312, Invalid=3110, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 02:41:39,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 02:41:39,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 94. [2020-09-17 02:41:39,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:41:39,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-09-17 02:41:39,725 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 29 [2020-09-17 02:41:39,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:39,725 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-09-17 02:41:39,725 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:39,725 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-09-17 02:41:39,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:39,725 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:39,725 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:39,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:39,928 INFO L427 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:39,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:39,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1323828254, now seen corresponding path program 259 times [2020-09-17 02:41:39,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:39,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325931485] [2020-09-17 02:41:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:40,446 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:40,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325931485] [2020-09-17 02:41:40,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119363361] [2020-09-17 02:41:40,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:40,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:40,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-17 02:41:40,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:40,553 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:40,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:40,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2020-09-17 02:41:40,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284683425] [2020-09-17 02:41:40,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-17 02:41:40,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:40,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-17 02:41:40,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-09-17 02:41:40,556 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 25 states. [2020-09-17 02:41:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:42,637 INFO L93 Difference]: Finished difference Result 152 states and 367 transitions. [2020-09-17 02:41:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 02:41:42,638 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-09-17 02:41:42,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:42,638 INFO L225 Difference]: With dead ends: 152 [2020-09-17 02:41:42,638 INFO L226 Difference]: Without dead ends: 146 [2020-09-17 02:41:42,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1315 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1448, Invalid=3108, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 02:41:42,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-17 02:41:42,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 100. [2020-09-17 02:41:42,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 02:41:42,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 261 transitions. [2020-09-17 02:41:42,641 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 261 transitions. Word has length 29 [2020-09-17 02:41:42,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:42,641 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 261 transitions. [2020-09-17 02:41:42,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-17 02:41:42,641 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 261 transitions. [2020-09-17 02:41:42,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-17 02:41:42,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:42,642 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:42,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2020-09-17 02:41:42,843 INFO L427 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:42,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:42,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1323811514, now seen corresponding path program 260 times [2020-09-17 02:41:42,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:42,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866383260] [2020-09-17 02:41:42,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:42,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:43,366 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:43,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866383260] [2020-09-17 02:41:43,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [631502868] [2020-09-17 02:41:43,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:43,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:41:43,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:43,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:41:43,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:43,527 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:43,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:43,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-09-17 02:41:43,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532122583] [2020-09-17 02:41:43,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:43,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:43,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:43,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:43,528 INFO L87 Difference]: Start difference. First operand 100 states and 261 transitions. Second operand 26 states. [2020-09-17 02:41:45,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:45,936 INFO L93 Difference]: Finished difference Result 133 states and 323 transitions. [2020-09-17 02:41:45,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 02:41:45,937 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-09-17 02:41:45,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:45,938 INFO L225 Difference]: With dead ends: 133 [2020-09-17 02:41:45,938 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:41:45,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1246 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1321, Invalid=3371, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 02:41:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:41:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2020-09-17 02:41:45,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 02:41:45,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-09-17 02:41:45,941 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-09-17 02:41:45,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:45,942 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-09-17 02:41:45,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:45,942 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-09-17 02:41:45,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:41:45,942 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:45,942 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:46,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:46,151 INFO L427 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:46,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:46,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1170458439, now seen corresponding path program 261 times [2020-09-17 02:41:46,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:46,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632882535] [2020-09-17 02:41:46,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:46,906 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:46,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632882535] [2020-09-17 02:41:46,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046889839] [2020-09-17 02:41:46,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:46,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 02:41:46,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:46,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:41:46,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:46,998 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:46,999 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:46,999 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:41:46,999 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47831136] [2020-09-17 02:41:47,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:47,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:47,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:47,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:47,000 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 26 states. [2020-09-17 02:41:48,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:48,172 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-09-17 02:41:48,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:41:48,174 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:41:48,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:48,174 INFO L225 Difference]: With dead ends: 154 [2020-09-17 02:41:48,174 INFO L226 Difference]: Without dead ends: 148 [2020-09-17 02:41:48,175 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=717, Invalid=1635, Unknown=0, NotChecked=0, Total=2352 [2020-09-17 02:41:48,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-17 02:41:48,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 99. [2020-09-17 02:41:48,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:41:48,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:41:48,177 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:41:48,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:48,178 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:41:48,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:48,178 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:41:48,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:41:48,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:48,178 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:48,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,259 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:48,379 INFO L427 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:48,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:48,379 INFO L82 PathProgramCache]: Analyzing trace with hash 2085740573, now seen corresponding path program 262 times [2020-09-17 02:41:48,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:48,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545057059] [2020-09-17 02:41:48,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:48,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:49,113 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:49,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545057059] [2020-09-17 02:41:49,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482886140] [2020-09-17 02:41:49,114 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:49,189 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:41:49,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:49,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:41:49,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:49,234 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:49,251 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:49,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:49,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:41:49,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969267936] [2020-09-17 02:41:49,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:41:49,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:49,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:41:49,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:41:49,255 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:41:50,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:50,637 INFO L93 Difference]: Finished difference Result 151 states and 357 transitions. [2020-09-17 02:41:50,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:41:50,639 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:41:50,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:50,639 INFO L225 Difference]: With dead ends: 151 [2020-09-17 02:41:50,639 INFO L226 Difference]: Without dead ends: 145 [2020-09-17 02:41:50,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=770, Invalid=1882, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:41:50,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-17 02:41:50,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 98. [2020-09-17 02:41:50,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:41:50,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:41:50,642 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:41:50,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:50,642 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:41:50,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:41:50,643 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:41:50,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:41:50,643 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:50,643 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:50,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,260 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:50,844 INFO L427 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:50,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:50,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1794443493, now seen corresponding path program 263 times [2020-09-17 02:41:50,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:50,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232198479] [2020-09-17 02:41:50,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:50,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:51,538 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:51,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232198479] [2020-09-17 02:41:51,539 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225000026] [2020-09-17 02:41:51,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:51,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:41:51,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:51,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:41:51,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:51,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:51,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:41:51,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350686245] [2020-09-17 02:41:51,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:51,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:51,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:51,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:51,635 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:41:52,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:52,955 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-09-17 02:41:52,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:41:52,957 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:41:52,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:52,958 INFO L225 Difference]: With dead ends: 148 [2020-09-17 02:41:52,958 INFO L226 Difference]: Without dead ends: 142 [2020-09-17 02:41:52,958 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=720, Invalid=1830, Unknown=0, NotChecked=0, Total=2550 [2020-09-17 02:41:52,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-17 02:41:52,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 99. [2020-09-17 02:41:52,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:41:52,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:41:52,961 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:41:52,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:52,961 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:41:52,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:52,961 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:41:52,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:41:52,961 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:52,961 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:53,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,261 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:53,164 INFO L427 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:53,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:53,164 INFO L82 PathProgramCache]: Analyzing trace with hash 778774399, now seen corresponding path program 264 times [2020-09-17 02:41:53,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:53,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411015700] [2020-09-17 02:41:53,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:53,852 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:53,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411015700] [2020-09-17 02:41:53,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734751932] [2020-09-17 02:41:53,853 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:53,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:41:53,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:53,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:41:53,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:53,972 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:53,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:53,991 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:41:53,991 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975990903] [2020-09-17 02:41:53,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:41:53,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:53,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:41:53,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=565, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:41:53,991 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:41:55,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:55,515 INFO L93 Difference]: Finished difference Result 147 states and 349 transitions. [2020-09-17 02:41:55,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:41:55,517 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:41:55,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:55,517 INFO L225 Difference]: With dead ends: 147 [2020-09-17 02:41:55,517 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 02:41:55,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 564 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=780, Invalid=2082, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:41:55,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 02:41:55,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 98. [2020-09-17 02:41:55,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:41:55,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:41:55,520 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:41:55,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:55,521 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:41:55,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:41:55,521 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:41:55,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:41:55,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:55,521 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:55,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable265,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:55,722 INFO L427 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:55,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:55,722 INFO L82 PathProgramCache]: Analyzing trace with hash -405150211, now seen corresponding path program 265 times [2020-09-17 02:41:55,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:55,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594342925] [2020-09-17 02:41:55,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:56,406 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:56,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594342925] [2020-09-17 02:41:56,407 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714801212] [2020-09-17 02:41:56,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:56,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:56,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:41:56,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:56,502 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:56,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:56,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:41:56,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630405684] [2020-09-17 02:41:56,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:41:56,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:56,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:41:56,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:41:56,504 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:41:57,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:41:57,903 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-09-17 02:41:57,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:41:57,904 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:41:57,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:41:57,905 INFO L225 Difference]: With dead ends: 144 [2020-09-17 02:41:57,905 INFO L226 Difference]: Without dead ends: 138 [2020-09-17 02:41:57,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=739, Invalid=2017, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:41:57,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-17 02:41:57,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 99. [2020-09-17 02:41:57,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:41:57,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:41:57,908 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:41:57,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:41:57,908 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:41:57,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:41:57,908 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:41:57,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:41:57,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:41:57,909 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:41:58,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2020-09-17 02:41:58,109 INFO L427 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:41:58,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:41:58,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1953308831, now seen corresponding path program 266 times [2020-09-17 02:41:58,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:41:58,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318087487] [2020-09-17 02:41:58,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:41:58,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:41:58,760 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:58,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318087487] [2020-09-17 02:41:58,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479234748] [2020-09-17 02:41:58,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:41:58,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:41:58,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:41:58,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:41:58,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:41:58,872 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:41:58,896 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:41:58,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:41:58,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:41:58,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083914472] [2020-09-17 02:41:58,897 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:41:58,897 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:41:58,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:41:58,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:41:58,898 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:00,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:00,577 INFO L93 Difference]: Finished difference Result 143 states and 341 transitions. [2020-09-17 02:42:00,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:42:00,578 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:00,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:00,579 INFO L225 Difference]: With dead ends: 143 [2020-09-17 02:42:00,579 INFO L226 Difference]: Without dead ends: 137 [2020-09-17 02:42:00,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=806, Invalid=2274, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:42:00,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-17 02:42:00,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 98. [2020-09-17 02:42:00,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:00,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:00,582 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:00,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:00,582 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:00,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:00,582 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:00,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:00,583 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:00,583 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:00,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2020-09-17 02:42:00,784 INFO L427 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:00,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:00,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1039869279, now seen corresponding path program 267 times [2020-09-17 02:42:00,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:00,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225530611] [2020-09-17 02:42:00,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:01,439 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:01,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225530611] [2020-09-17 02:42:01,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479533513] [2020-09-17 02:42:01,440 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:01,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 02:42:01,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:01,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:01,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:01,541 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:01,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:01,542 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:01,542 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790720087] [2020-09-17 02:42:01,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:01,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:01,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:01,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:01,542 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:03,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:03,073 INFO L93 Difference]: Finished difference Result 140 states and 335 transitions. [2020-09-17 02:42:03,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:42:03,075 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:03,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:03,076 INFO L225 Difference]: With dead ends: 140 [2020-09-17 02:42:03,076 INFO L226 Difference]: Without dead ends: 134 [2020-09-17 02:42:03,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=774, Invalid=2196, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:42:03,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-17 02:42:03,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 99. [2020-09-17 02:42:03,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:42:03,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:42:03,079 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:42:03,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:03,079 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:42:03,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:03,079 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:42:03,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:03,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:03,079 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:03,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 265 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2020-09-17 02:42:03,280 INFO L427 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:03,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:03,281 INFO L82 PathProgramCache]: Analyzing trace with hash 229320643, now seen corresponding path program 268 times [2020-09-17 02:42:03,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:03,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917959251] [2020-09-17 02:42:03,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:03,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:03,898 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:03,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917959251] [2020-09-17 02:42:03,899 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [163826913] [2020-09-17 02:42:03,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:03,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:42:03,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:03,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:03,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:04,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:04,038 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:04,039 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:04,039 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:04,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058936636] [2020-09-17 02:42:04,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:04,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:04,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:04,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:04,040 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:05,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:05,871 INFO L93 Difference]: Finished difference Result 139 states and 333 transitions. [2020-09-17 02:42:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:42:05,873 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:05,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:05,874 INFO L225 Difference]: With dead ends: 139 [2020-09-17 02:42:05,874 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:42:05,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=848, Invalid=2458, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:42:05,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:42:05,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 98. [2020-09-17 02:42:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:05,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:05,876 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:05,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:05,876 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:05,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:05,877 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:05,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:05,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:05,877 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:06,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable269 [2020-09-17 02:42:06,078 INFO L427 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:06,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:06,078 INFO L82 PathProgramCache]: Analyzing trace with hash 281597249, now seen corresponding path program 269 times [2020-09-17 02:42:06,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:06,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121317526] [2020-09-17 02:42:06,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:06,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:06,728 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:06,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121317526] [2020-09-17 02:42:06,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777625329] [2020-09-17 02:42:06,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:06,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:42:06,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:06,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:06,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:06,828 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:06,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:06,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:06,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250939481] [2020-09-17 02:42:06,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:06,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:06,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:06,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:06,830 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:08,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:08,413 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-17 02:42:08,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:42:08,414 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:08,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:08,414 INFO L225 Difference]: With dead ends: 136 [2020-09-17 02:42:08,414 INFO L226 Difference]: Without dead ends: 130 [2020-09-17 02:42:08,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=825, Invalid=2367, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:42:08,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-17 02:42:08,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 99. [2020-09-17 02:42:08,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:42:08,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:42:08,417 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:42:08,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:08,417 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:42:08,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:08,418 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:42:08,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:08,418 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:08,418 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:08,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,267 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:08,619 INFO L427 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:08,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:08,619 INFO L82 PathProgramCache]: Analyzing trace with hash -2137120603, now seen corresponding path program 270 times [2020-09-17 02:42:08,620 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:08,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024046607] [2020-09-17 02:42:08,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:08,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:09,204 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:09,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024046607] [2020-09-17 02:42:09,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607662788] [2020-09-17 02:42:09,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:09,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:42:09,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:09,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:09,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:09,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:09,350 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:09,350 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:09,350 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478364470] [2020-09-17 02:42:09,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:09,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:09,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:09,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:09,351 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:11,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:11,336 INFO L93 Difference]: Finished difference Result 135 states and 325 transitions. [2020-09-17 02:42:11,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:42:11,338 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:11,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:11,338 INFO L225 Difference]: With dead ends: 135 [2020-09-17 02:42:11,338 INFO L226 Difference]: Without dead ends: 129 [2020-09-17 02:42:11,339 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=906, Invalid=2634, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:42:11,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-17 02:42:11,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 98. [2020-09-17 02:42:11,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:11,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:11,341 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:11,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:11,342 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:11,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:11,342 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:11,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:11,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:11,342 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:11,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable271 [2020-09-17 02:42:11,543 INFO L427 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:11,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:11,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1448798813, now seen corresponding path program 271 times [2020-09-17 02:42:11,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:11,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128824707] [2020-09-17 02:42:11,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:11,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:12,140 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:12,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128824707] [2020-09-17 02:42:12,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518732844] [2020-09-17 02:42:12,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:12,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:12,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:12,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:12,245 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:12,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:12,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:12,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034495208] [2020-09-17 02:42:12,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:12,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:12,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:12,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:12,246 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:14,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:14,027 INFO L93 Difference]: Finished difference Result 132 states and 319 transitions. [2020-09-17 02:42:14,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:42:14,029 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:14,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:14,029 INFO L225 Difference]: With dead ends: 132 [2020-09-17 02:42:14,029 INFO L226 Difference]: Without dead ends: 126 [2020-09-17 02:42:14,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:42:14,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-17 02:42:14,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 99. [2020-09-17 02:42:14,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:42:14,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:42:14,032 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:42:14,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:14,033 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:42:14,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:14,033 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:42:14,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:14,033 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:14,033 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:14,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,269 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:14,234 INFO L427 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:14,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:14,235 INFO L82 PathProgramCache]: Analyzing trace with hash -463607289, now seen corresponding path program 272 times [2020-09-17 02:42:14,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:14,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151999494] [2020-09-17 02:42:14,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:14,845 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:14,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151999494] [2020-09-17 02:42:14,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324252730] [2020-09-17 02:42:14,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:14,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:42:14,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:14,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:14,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:14,967 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:14,993 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:14,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:14,994 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141023199] [2020-09-17 02:42:14,994 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:14,994 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:14,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:14,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:14,995 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:17,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:17,163 INFO L93 Difference]: Finished difference Result 131 states and 317 transitions. [2020-09-17 02:42:17,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:42:17,164 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:17,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:17,165 INFO L225 Difference]: With dead ends: 131 [2020-09-17 02:42:17,165 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:42:17,166 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=980, Invalid=2802, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:42:17,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:42:17,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 98. [2020-09-17 02:42:17,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:17,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:17,168 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:17,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:17,169 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:17,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:17,169 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:17,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:17,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:17,169 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:17,369 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:17,370 INFO L427 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:17,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:17,370 INFO L82 PathProgramCache]: Analyzing trace with hash -2080766331, now seen corresponding path program 273 times [2020-09-17 02:42:17,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:17,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655724696] [2020-09-17 02:42:17,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:17,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:17,958 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:17,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655724696] [2020-09-17 02:42:17,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1155661017] [2020-09-17 02:42:17,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:18,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 02:42:18,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:18,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:18,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:18,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:18,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:18,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629868889] [2020-09-17 02:42:18,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:18,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:18,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:18,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:18,075 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:19,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:19,960 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-09-17 02:42:19,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:42:19,961 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:19,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:19,962 INFO L225 Difference]: With dead ends: 128 [2020-09-17 02:42:19,962 INFO L226 Difference]: Without dead ends: 122 [2020-09-17 02:42:19,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=975, Invalid=2685, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:42:19,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-17 02:42:19,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 99. [2020-09-17 02:42:19,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:42:19,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:42:19,964 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:42:19,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:19,965 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:42:19,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:19,965 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:42:19,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:19,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:19,965 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:20,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable274,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:20,167 INFO L427 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:20,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:20,168 INFO L82 PathProgramCache]: Analyzing trace with hash -823876631, now seen corresponding path program 274 times [2020-09-17 02:42:20,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:20,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262554418] [2020-09-17 02:42:20,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:20,766 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:20,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262554418] [2020-09-17 02:42:20,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159280590] [2020-09-17 02:42:20,766 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:20,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:42:20,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:20,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:20,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:20,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:20,913 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:20,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:20,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:20,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432842959] [2020-09-17 02:42:20,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:20,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:20,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:20,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=590, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:20,914 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:23,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:23,446 INFO L93 Difference]: Finished difference Result 127 states and 309 transitions. [2020-09-17 02:42:23,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:42:23,448 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:23,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:23,448 INFO L225 Difference]: With dead ends: 127 [2020-09-17 02:42:23,449 INFO L226 Difference]: Without dead ends: 121 [2020-09-17 02:42:23,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 964 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1070, Invalid=2962, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 02:42:23,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-17 02:42:23,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 98. [2020-09-17 02:42:23,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:23,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:23,451 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:23,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:23,452 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:23,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:23,452 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:23,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:23,452 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:23,452 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:23,653 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:23,653 INFO L427 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:23,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:23,654 INFO L82 PathProgramCache]: Analyzing trace with hash 792315879, now seen corresponding path program 275 times [2020-09-17 02:42:23,654 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:23,654 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139052291] [2020-09-17 02:42:23,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:23,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:24,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139052291] [2020-09-17 02:42:24,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995368362] [2020-09-17 02:42:24,252 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:24,331 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:42:24,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:24,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:24,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:24,379 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:24,379 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:24,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:24,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353465757] [2020-09-17 02:42:24,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:24,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:24,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:24,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=532, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:24,380 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:26,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:26,432 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-09-17 02:42:26,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:42:26,434 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:26,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:26,434 INFO L225 Difference]: With dead ends: 124 [2020-09-17 02:42:26,434 INFO L226 Difference]: Without dead ends: 118 [2020-09-17 02:42:26,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1074, Invalid=2832, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:42:26,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-17 02:42:26,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 99. [2020-09-17 02:42:26,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:42:26,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:42:26,437 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:42:26,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:26,437 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:42:26,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:26,437 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:42:26,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:26,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:26,438 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:26,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 273 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable276 [2020-09-17 02:42:26,639 INFO L427 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:26,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:26,639 INFO L82 PathProgramCache]: Analyzing trace with hash 1312058955, now seen corresponding path program 276 times [2020-09-17 02:42:26,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:26,640 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328262652] [2020-09-17 02:42:26,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:26,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:27,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328262652] [2020-09-17 02:42:27,231 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126287567] [2020-09-17 02:42:27,232 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:27,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:42:27,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:27,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:27,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:27,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:27,385 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:27,386 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:27,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:27,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717729283] [2020-09-17 02:42:27,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:27,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:27,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:27,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:27,387 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:29,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:29,934 INFO L93 Difference]: Finished difference Result 123 states and 301 transitions. [2020-09-17 02:42:29,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:42:29,936 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:29,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:29,936 INFO L225 Difference]: With dead ends: 123 [2020-09-17 02:42:29,936 INFO L226 Difference]: Without dead ends: 117 [2020-09-17 02:42:29,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1056 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1176, Invalid=3114, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 02:42:29,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-17 02:42:29,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-09-17 02:42:29,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:29,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:29,939 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:29,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:29,939 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:29,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:29,939 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:29,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:29,940 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:30,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 274 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable277 [2020-09-17 02:42:30,141 INFO L427 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:30,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:30,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1327597111, now seen corresponding path program 277 times [2020-09-17 02:42:30,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:30,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249185662] [2020-09-17 02:42:30,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:30,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249185662] [2020-09-17 02:42:30,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295537893] [2020-09-17 02:42:30,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:30,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:30,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:30,842 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:30,842 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:30,842 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:30,842 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054070940] [2020-09-17 02:42:30,842 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:30,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:30,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:30,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=522, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:30,843 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:33,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:33,054 INFO L93 Difference]: Finished difference Result 120 states and 295 transitions. [2020-09-17 02:42:33,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:42:33,056 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:33,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:33,057 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:42:33,057 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:42:33,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1189, Invalid=2971, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 02:42:33,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:42:33,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 99. [2020-09-17 02:42:33,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:42:33,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:42:33,060 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:42:33,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:33,060 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:42:33,060 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:33,060 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:42:33,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:33,060 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:33,061 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:33,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2020-09-17 02:42:33,261 INFO L427 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:33,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:33,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1247242541, now seen corresponding path program 278 times [2020-09-17 02:42:33,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:33,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430292836] [2020-09-17 02:42:33,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:33,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:33,912 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:33,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430292836] [2020-09-17 02:42:33,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814522806] [2020-09-17 02:42:33,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:33,980 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:42:33,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:33,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:33,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:34,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:34,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:34,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:34,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450190320] [2020-09-17 02:42:34,064 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:34,064 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:34,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:34,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:34,065 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:36,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:36,813 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-17 02:42:36,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 02:42:36,815 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:36,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:36,815 INFO L225 Difference]: With dead ends: 119 [2020-09-17 02:42:36,815 INFO L226 Difference]: Without dead ends: 113 [2020-09-17 02:42:36,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1298, Invalid=3258, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 02:42:36,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-17 02:42:36,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 98. [2020-09-17 02:42:36,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:36,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:36,818 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:36,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:36,818 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:36,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:36,819 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:36,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:36,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:36,819 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:37,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable279 [2020-09-17 02:42:37,020 INFO L427 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:37,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:37,020 INFO L82 PathProgramCache]: Analyzing trace with hash 1718238251, now seen corresponding path program 279 times [2020-09-17 02:42:37,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:37,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442148875] [2020-09-17 02:42:37,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:37,598 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442148875] [2020-09-17 02:42:37,599 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [175632146] [2020-09-17 02:42:37,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:37,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-09-17 02:42:37,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:37,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:37,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:37,716 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:37,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:37,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:37,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995946391] [2020-09-17 02:42:37,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:37,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:37,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:37,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=508, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:37,718 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:40,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:40,009 INFO L93 Difference]: Finished difference Result 116 states and 287 transitions. [2020-09-17 02:42:40,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-17 02:42:40,010 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:40,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:40,011 INFO L225 Difference]: With dead ends: 116 [2020-09-17 02:42:40,011 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 02:42:40,011 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1320, Invalid=3102, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 02:42:40,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 02:42:40,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 99. [2020-09-17 02:42:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:42:40,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:42:40,014 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 30 [2020-09-17 02:42:40,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:40,014 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:42:40,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:42:40,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:40,015 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:40,015 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:40,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable280,277 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:40,215 INFO L427 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:40,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:40,216 INFO L82 PathProgramCache]: Analyzing trace with hash 1734325391, now seen corresponding path program 280 times [2020-09-17 02:42:40,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:40,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297227805] [2020-09-17 02:42:40,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:40,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:40,816 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:40,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297227805] [2020-09-17 02:42:40,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572956394] [2020-09-17 02:42:40,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:40,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:42:40,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:40,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:40,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:40,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:42:40,969 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:40,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:40,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:40,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566832174] [2020-09-17 02:42:40,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:40,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:40,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:40,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:40,970 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 27 states. [2020-09-17 02:42:43,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:43,974 INFO L93 Difference]: Finished difference Result 115 states and 285 transitions. [2020-09-17 02:42:43,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 02:42:43,976 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:43,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:43,976 INFO L225 Difference]: With dead ends: 115 [2020-09-17 02:42:43,977 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:42:43,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1436, Invalid=3394, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 02:42:43,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:42:43,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2020-09-17 02:42:43,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:42:43,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:42:43,979 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 30 [2020-09-17 02:42:43,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:43,979 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:42:43,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:43,980 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:42:43,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:43,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:43,980 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:44,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable281 [2020-09-17 02:42:44,181 INFO L427 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:44,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:44,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1734815501, now seen corresponding path program 281 times [2020-09-17 02:42:44,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:44,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842801289] [2020-09-17 02:42:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:44,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:44,770 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:44,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842801289] [2020-09-17 02:42:44,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310999236] [2020-09-17 02:42:44,771 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:44,840 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-17 02:42:44,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:44,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:44,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:44,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:44,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-09-17 02:42:44,889 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55744950] [2020-09-17 02:42:44,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-09-17 02:42:44,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:44,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-09-17 02:42:44,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=490, Unknown=0, NotChecked=0, Total=650 [2020-09-17 02:42:44,890 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 26 states. [2020-09-17 02:42:47,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:47,436 INFO L93 Difference]: Finished difference Result 131 states and 325 transitions. [2020-09-17 02:42:47,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 02:42:47,438 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-09-17 02:42:47,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:47,438 INFO L225 Difference]: With dead ends: 131 [2020-09-17 02:42:47,438 INFO L226 Difference]: Without dead ends: 125 [2020-09-17 02:42:47,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1467, Invalid=3225, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 02:42:47,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-17 02:42:47,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 102. [2020-09-17 02:42:47,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 02:42:47,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 265 transitions. [2020-09-17 02:42:47,441 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 265 transitions. Word has length 30 [2020-09-17 02:42:47,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:47,441 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 265 transitions. [2020-09-17 02:42:47,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-09-17 02:42:47,441 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 265 transitions. [2020-09-17 02:42:47,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:47,442 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:47,442 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:47,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable282,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:47,643 INFO L427 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:47,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:47,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1734832241, now seen corresponding path program 282 times [2020-09-17 02:42:47,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:47,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549835442] [2020-09-17 02:42:47,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:47,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:48,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549835442] [2020-09-17 02:42:48,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691374158] [2020-09-17 02:42:48,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:48,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-09-17 02:42:48,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:48,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:42:48,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:48,381 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:48,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:48,382 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:48,382 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118686224] [2020-09-17 02:42:48,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:48,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:48,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:48,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:48,382 INFO L87 Difference]: Start difference. First operand 102 states and 265 transitions. Second operand 27 states. [2020-09-17 02:42:50,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:50,974 INFO L93 Difference]: Finished difference Result 110 states and 277 transitions. [2020-09-17 02:42:50,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 02:42:50,976 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:50,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:50,977 INFO L225 Difference]: With dead ends: 110 [2020-09-17 02:42:50,977 INFO L226 Difference]: Without dead ends: 102 [2020-09-17 02:42:50,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1337, Invalid=3493, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 02:42:50,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-17 02:42:50,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2020-09-17 02:42:50,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-17 02:42:50,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 178 transitions. [2020-09-17 02:42:50,979 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 178 transitions. Word has length 30 [2020-09-17 02:42:50,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:50,979 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 178 transitions. [2020-09-17 02:42:50,979 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:50,980 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 178 transitions. [2020-09-17 02:42:50,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-09-17 02:42:50,980 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:50,980 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:51,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable283,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:51,181 INFO L427 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:51,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:51,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1911532333, now seen corresponding path program 283 times [2020-09-17 02:42:51,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:51,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069703483] [2020-09-17 02:42:51,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:51,754 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:51,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069703483] [2020-09-17 02:42:51,754 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671506854] [2020-09-17 02:42:51,755 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:51,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:51,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 26 conjunts are in the unsatisfiable core [2020-09-17 02:42:51,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:51,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:42:51,919 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:51,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:51,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-09-17 02:42:51,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043782678] [2020-09-17 02:42:51,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:51,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:51,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:51,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:51,921 INFO L87 Difference]: Start difference. First operand 73 states and 178 transitions. Second operand 27 states. [2020-09-17 02:42:54,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:54,637 INFO L93 Difference]: Finished difference Result 132 states and 323 transitions. [2020-09-17 02:42:54,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 02:42:54,638 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-09-17 02:42:54,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:54,639 INFO L225 Difference]: With dead ends: 132 [2020-09-17 02:42:54,639 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 02:42:54,639 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1461 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1649, Invalid=3463, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 02:42:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 02:42:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 100. [2020-09-17 02:42:54,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 02:42:54,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-09-17 02:42:54,641 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 30 [2020-09-17 02:42:54,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:54,641 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-09-17 02:42:54,641 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:42:54,641 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-09-17 02:42:54,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:42:54,642 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:54,642 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:54,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,281 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:54,843 INFO L427 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:54,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:54,843 INFO L82 PathProgramCache]: Analyzing trace with hash -2054759070, now seen corresponding path program 284 times [2020-09-17 02:42:54,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:54,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692963863] [2020-09-17 02:42:54,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:54,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:55,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692963863] [2020-09-17 02:42:55,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020717672] [2020-09-17 02:42:55,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:55,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:42:55,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:55,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:42:55,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:55,594 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:42:55,635 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:55,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:55,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:42:55,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168786919] [2020-09-17 02:42:55,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:42:55,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:55,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:42:55,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:42:55,637 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 28 states. [2020-09-17 02:42:58,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:42:58,482 INFO L93 Difference]: Finished difference Result 108 states and 277 transitions. [2020-09-17 02:42:58,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 02:42:58,483 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:42:58,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:42:58,484 INFO L225 Difference]: With dead ends: 108 [2020-09-17 02:42:58,484 INFO L226 Difference]: Without dead ends: 103 [2020-09-17 02:42:58,485 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1669, Invalid=3587, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 02:42:58,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-17 02:42:58,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 74. [2020-09-17 02:42:58,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-17 02:42:58,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 182 transitions. [2020-09-17 02:42:58,487 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 182 transitions. Word has length 31 [2020-09-17 02:42:58,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:42:58,487 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 182 transitions. [2020-09-17 02:42:58,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:42:58,487 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 182 transitions. [2020-09-17 02:42:58,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:42:58,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:42:58,488 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:42:58,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable285,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:58,692 INFO L427 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:42:58,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:42:58,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1128130483, now seen corresponding path program 285 times [2020-09-17 02:42:58,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:42:58,693 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291802461] [2020-09-17 02:42:58,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:42:58,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:42:59,566 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:59,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291802461] [2020-09-17 02:42:59,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500226726] [2020-09-17 02:42:59,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:42:59,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:42:59,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:42:59,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:42:59,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:42:59,668 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:42:59,668 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:42:59,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:42:59,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669440025] [2020-09-17 02:42:59,670 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:42:59,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:42:59,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:42:59,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=518, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:42:59,671 INFO L87 Difference]: Start difference. First operand 74 states and 182 transitions. Second operand 27 states. [2020-09-17 02:43:01,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:01,083 INFO L93 Difference]: Finished difference Result 114 states and 265 transitions. [2020-09-17 02:43:01,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-17 02:43:01,085 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:01,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:01,086 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:43:01,086 INFO L226 Difference]: Without dead ends: 108 [2020-09-17 02:43:01,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=783, Invalid=1667, Unknown=0, NotChecked=0, Total=2450 [2020-09-17 02:43:01,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-17 02:43:01,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-09-17 02:43:01,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:43:01,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 201 transitions. [2020-09-17 02:43:01,090 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 201 transitions. Word has length 31 [2020-09-17 02:43:01,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:01,090 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 201 transitions. [2020-09-17 02:43:01,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:01,091 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 201 transitions. [2020-09-17 02:43:01,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:01,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:01,091 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:01,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,283 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:01,298 INFO L427 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:01,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:01,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1342928561, now seen corresponding path program 286 times [2020-09-17 02:43:01,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:01,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499674306] [2020-09-17 02:43:01,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:02,150 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:02,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499674306] [2020-09-17 02:43:02,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1138152393] [2020-09-17 02:43:02,151 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:02,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:43:02,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:02,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:02,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:02,267 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:02,283 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:02,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:02,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:02,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648555609] [2020-09-17 02:43:02,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:02,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:02,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:02,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:02,285 INFO L87 Difference]: Start difference. First operand 82 states and 201 transitions. Second operand 28 states. [2020-09-17 02:43:03,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:03,779 INFO L93 Difference]: Finished difference Result 138 states and 313 transitions. [2020-09-17 02:43:03,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-17 02:43:03,781 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:03,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:03,782 INFO L225 Difference]: With dead ends: 138 [2020-09-17 02:43:03,782 INFO L226 Difference]: Without dead ends: 132 [2020-09-17 02:43:03,782 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 487 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=792, Invalid=1860, Unknown=0, NotChecked=0, Total=2652 [2020-09-17 02:43:03,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-17 02:43:03,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 80. [2020-09-17 02:43:03,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-17 02:43:03,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 197 transitions. [2020-09-17 02:43:03,785 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 197 transitions. Word has length 31 [2020-09-17 02:43:03,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:03,785 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 197 transitions. [2020-09-17 02:43:03,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:03,785 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 197 transitions. [2020-09-17 02:43:03,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:03,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:03,786 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:03,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 284 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable287 [2020-09-17 02:43:03,987 INFO L427 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:03,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:03,987 INFO L82 PathProgramCache]: Analyzing trace with hash 517654063, now seen corresponding path program 287 times [2020-09-17 02:43:03,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:03,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607099528] [2020-09-17 02:43:03,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:04,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:04,881 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:04,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607099528] [2020-09-17 02:43:04,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232217978] [2020-09-17 02:43:04,881 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:04,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:43:04,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:04,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:04,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:04,981 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:04,981 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:04,981 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:04,981 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902107505] [2020-09-17 02:43:04,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:04,982 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:04,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:04,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=539, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:04,982 INFO L87 Difference]: Start difference. First operand 80 states and 197 transitions. Second operand 27 states. [2020-09-17 02:43:06,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:06,499 INFO L93 Difference]: Finished difference Result 139 states and 317 transitions. [2020-09-17 02:43:06,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:43:06,501 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:06,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:06,501 INFO L225 Difference]: With dead ends: 139 [2020-09-17 02:43:06,501 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:43:06,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=793, Invalid=1963, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:43:06,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:43:06,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 83. [2020-09-17 02:43:06,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-17 02:43:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 205 transitions. [2020-09-17 02:43:06,504 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 205 transitions. Word has length 31 [2020-09-17 02:43:06,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:06,504 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 205 transitions. [2020-09-17 02:43:06,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:06,504 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 205 transitions. [2020-09-17 02:43:06,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:06,504 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:06,504 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:06,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2020-09-17 02:43:06,705 INFO L427 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:06,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:06,706 INFO L82 PathProgramCache]: Analyzing trace with hash -521114221, now seen corresponding path program 288 times [2020-09-17 02:43:06,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:06,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338733825] [2020-09-17 02:43:06,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:06,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:07,525 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:07,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338733825] [2020-09-17 02:43:07,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472506415] [2020-09-17 02:43:07,526 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:07,605 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:43:07,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:07,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:07,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:07,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:07,678 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:07,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:07,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:07,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593359163] [2020-09-17 02:43:07,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:07,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:07,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:07,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:07,679 INFO L87 Difference]: Start difference. First operand 83 states and 205 transitions. Second operand 28 states. [2020-09-17 02:43:09,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:09,345 INFO L93 Difference]: Finished difference Result 159 states and 357 transitions. [2020-09-17 02:43:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:43:09,348 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:09,348 INFO L225 Difference]: With dead ends: 159 [2020-09-17 02:43:09,348 INFO L226 Difference]: Without dead ends: 153 [2020-09-17 02:43:09,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=833, Invalid=2137, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:43:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-17 02:43:09,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 82. [2020-09-17 02:43:09,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-17 02:43:09,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 203 transitions. [2020-09-17 02:43:09,351 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 203 transitions. Word has length 31 [2020-09-17 02:43:09,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:09,351 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 203 transitions. [2020-09-17 02:43:09,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:09,351 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 203 transitions. [2020-09-17 02:43:09,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:09,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:09,352 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:09,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable289 [2020-09-17 02:43:09,552 INFO L427 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:09,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:09,553 INFO L82 PathProgramCache]: Analyzing trace with hash -106330991, now seen corresponding path program 289 times [2020-09-17 02:43:09,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:09,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239994527] [2020-09-17 02:43:09,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:09,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:10,402 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:10,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239994527] [2020-09-17 02:43:10,402 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362289719] [2020-09-17 02:43:10,402 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:10,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:10,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:10,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:10,504 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:10,504 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:10,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780050746] [2020-09-17 02:43:10,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:10,505 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:10,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:10,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:10,505 INFO L87 Difference]: Start difference. First operand 82 states and 203 transitions. Second operand 27 states. [2020-09-17 02:43:12,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:12,053 INFO L93 Difference]: Finished difference Result 159 states and 359 transitions. [2020-09-17 02:43:12,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:43:12,054 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:12,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:12,054 INFO L225 Difference]: With dead ends: 159 [2020-09-17 02:43:12,055 INFO L226 Difference]: Without dead ends: 153 [2020-09-17 02:43:12,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 644 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=848, Invalid=2232, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:43:12,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-17 02:43:12,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 85. [2020-09-17 02:43:12,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-17 02:43:12,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 211 transitions. [2020-09-17 02:43:12,057 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 211 transitions. Word has length 31 [2020-09-17 02:43:12,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:12,057 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 211 transitions. [2020-09-17 02:43:12,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:12,057 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 211 transitions. [2020-09-17 02:43:12,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:12,058 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:12,058 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:12,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:12,259 INFO L427 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:12,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:12,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1828080395, now seen corresponding path program 290 times [2020-09-17 02:43:12,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:12,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089145070] [2020-09-17 02:43:12,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:13,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089145070] [2020-09-17 02:43:13,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813664634] [2020-09-17 02:43:13,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:13,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:43:13,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:13,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:13,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:13,146 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:13,166 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:13,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:13,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:13,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033973945] [2020-09-17 02:43:13,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:13,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:13,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:13,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:13,167 INFO L87 Difference]: Start difference. First operand 85 states and 211 transitions. Second operand 28 states. [2020-09-17 02:43:14,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:14,883 INFO L93 Difference]: Finished difference Result 156 states and 353 transitions. [2020-09-17 02:43:14,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:43:14,885 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:14,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:14,886 INFO L225 Difference]: With dead ends: 156 [2020-09-17 02:43:14,886 INFO L226 Difference]: Without dead ends: 150 [2020-09-17 02:43:14,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=850, Invalid=2342, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:43:14,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-17 02:43:14,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 84. [2020-09-17 02:43:14,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 02:43:14,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 209 transitions. [2020-09-17 02:43:14,889 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 209 transitions. Word has length 31 [2020-09-17 02:43:14,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:14,889 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 209 transitions. [2020-09-17 02:43:14,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:14,889 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 209 transitions. [2020-09-17 02:43:14,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:14,889 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:14,889 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:15,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable291,288 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:15,090 INFO L427 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:15,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:15,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1282962291, now seen corresponding path program 291 times [2020-09-17 02:43:15,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:15,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334196965] [2020-09-17 02:43:15,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:15,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:15,863 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:15,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334196965] [2020-09-17 02:43:15,863 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356466141] [2020-09-17 02:43:15,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:15,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:43:15,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:15,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:15,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:15,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:15,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:15,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919721226] [2020-09-17 02:43:15,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:15,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:15,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:15,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:15,973 INFO L87 Difference]: Start difference. First operand 84 states and 209 transitions. Second operand 27 states. [2020-09-17 02:43:17,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:17,726 INFO L93 Difference]: Finished difference Result 157 states and 357 transitions. [2020-09-17 02:43:17,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:43:17,728 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:17,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:17,728 INFO L225 Difference]: With dead ends: 157 [2020-09-17 02:43:17,728 INFO L226 Difference]: Without dead ends: 151 [2020-09-17 02:43:17,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 725 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=880, Invalid=2426, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:43:17,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-17 02:43:17,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 87. [2020-09-17 02:43:17,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:43:17,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 217 transitions. [2020-09-17 02:43:17,730 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 217 transitions. Word has length 31 [2020-09-17 02:43:17,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:17,731 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 217 transitions. [2020-09-17 02:43:17,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 217 transitions. [2020-09-17 02:43:17,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:17,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:17,731 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:17,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:17,932 INFO L427 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:17,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:17,933 INFO L82 PathProgramCache]: Analyzing trace with hash -265196329, now seen corresponding path program 292 times [2020-09-17 02:43:17,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:17,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [855302332] [2020-09-17 02:43:17,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:18,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [855302332] [2020-09-17 02:43:18,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019283126] [2020-09-17 02:43:18,668 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:18,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:43:18,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:18,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:18,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:18,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:18,806 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:18,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:18,806 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:18,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623325857] [2020-09-17 02:43:18,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:18,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:18,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:18,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:18,807 INFO L87 Difference]: Start difference. First operand 87 states and 217 transitions. Second operand 28 states. [2020-09-17 02:43:20,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:20,616 INFO L93 Difference]: Finished difference Result 154 states and 351 transitions. [2020-09-17 02:43:20,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:43:20,618 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:20,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:20,618 INFO L225 Difference]: With dead ends: 154 [2020-09-17 02:43:20,618 INFO L226 Difference]: Without dead ends: 148 [2020-09-17 02:43:20,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=883, Invalid=2539, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:43:20,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-17 02:43:20,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 86. [2020-09-17 02:43:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:43:20,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 215 transitions. [2020-09-17 02:43:20,621 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 215 transitions. Word has length 31 [2020-09-17 02:43:20,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:20,621 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 215 transitions. [2020-09-17 02:43:20,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:20,622 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 215 transitions. [2020-09-17 02:43:20,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:20,622 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:20,622 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:20,823 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable293 [2020-09-17 02:43:20,823 INFO L427 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:20,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:20,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1566985515, now seen corresponding path program 293 times [2020-09-17 02:43:20,824 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:20,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620198136] [2020-09-17 02:43:20,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:21,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620198136] [2020-09-17 02:43:21,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311759690] [2020-09-17 02:43:21,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:21,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:43:21,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:21,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:21,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:21,647 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:21,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:21,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:21,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218803208] [2020-09-17 02:43:21,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:21,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:21,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:21,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:21,648 INFO L87 Difference]: Start difference. First operand 86 states and 215 transitions. Second operand 27 states. [2020-09-17 02:43:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:23,616 INFO L93 Difference]: Finished difference Result 155 states and 355 transitions. [2020-09-17 02:43:23,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:43:23,618 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:23,619 INFO L225 Difference]: With dead ends: 155 [2020-09-17 02:43:23,619 INFO L226 Difference]: Without dead ends: 149 [2020-09-17 02:43:23,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=928, Invalid=2612, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:43:23,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-17 02:43:23,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 89. [2020-09-17 02:43:23,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 02:43:23,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 223 transitions. [2020-09-17 02:43:23,622 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 223 transitions. Word has length 31 [2020-09-17 02:43:23,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:23,622 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 223 transitions. [2020-09-17 02:43:23,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:23,622 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 223 transitions. [2020-09-17 02:43:23,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:23,623 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:23,623 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:23,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:23,832 INFO L427 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:23,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:23,833 INFO L82 PathProgramCache]: Analyzing trace with hash 1917433145, now seen corresponding path program 294 times [2020-09-17 02:43:23,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:23,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969882728] [2020-09-17 02:43:23,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:24,655 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:24,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969882728] [2020-09-17 02:43:24,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430776181] [2020-09-17 02:43:24,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:24,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:43:24,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:24,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:24,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:24,785 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:24,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:24,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:24,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138198928] [2020-09-17 02:43:24,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:24,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:24,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:24,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:24,812 INFO L87 Difference]: Start difference. First operand 89 states and 223 transitions. Second operand 28 states. [2020-09-17 02:43:27,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:27,014 INFO L93 Difference]: Finished difference Result 152 states and 349 transitions. [2020-09-17 02:43:27,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:43:27,016 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:27,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:27,016 INFO L225 Difference]: With dead ends: 152 [2020-09-17 02:43:27,017 INFO L226 Difference]: Without dead ends: 146 [2020-09-17 02:43:27,017 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 835 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=932, Invalid=2728, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:43:27,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-17 02:43:27,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 88. [2020-09-17 02:43:27,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:43:27,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 221 transitions. [2020-09-17 02:43:27,020 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 221 transitions. Word has length 31 [2020-09-17 02:43:27,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:27,020 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 221 transitions. [2020-09-17 02:43:27,020 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:27,020 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 221 transitions. [2020-09-17 02:43:27,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:27,020 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:27,020 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:27,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable295,292 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:27,221 INFO L427 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:27,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:27,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1969709751, now seen corresponding path program 295 times [2020-09-17 02:43:27,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:27,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804063855] [2020-09-17 02:43:27,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:27,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:27,933 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:27,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804063855] [2020-09-17 02:43:27,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480183612] [2020-09-17 02:43:27,934 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:28,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:28,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:28,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:28,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:28,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:28,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414754556] [2020-09-17 02:43:28,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:28,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:28,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:28,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:28,059 INFO L87 Difference]: Start difference. First operand 88 states and 221 transitions. Second operand 27 states. [2020-09-17 02:43:30,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:30,094 INFO L93 Difference]: Finished difference Result 153 states and 353 transitions. [2020-09-17 02:43:30,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:43:30,096 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:30,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:30,096 INFO L225 Difference]: With dead ends: 153 [2020-09-17 02:43:30,096 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 02:43:30,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 912 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:43:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 02:43:30,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 91. [2020-09-17 02:43:30,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 02:43:30,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 229 transitions. [2020-09-17 02:43:30,099 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 229 transitions. Word has length 31 [2020-09-17 02:43:30,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:30,099 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 229 transitions. [2020-09-17 02:43:30,099 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:30,100 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 229 transitions. [2020-09-17 02:43:30,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:30,100 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:30,100 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:30,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,293 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:30,301 INFO L427 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:30,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:30,301 INFO L82 PathProgramCache]: Analyzing trace with hash -449008101, now seen corresponding path program 296 times [2020-09-17 02:43:30,302 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:30,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506181778] [2020-09-17 02:43:30,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:31,124 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:31,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506181778] [2020-09-17 02:43:31,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377160576] [2020-09-17 02:43:31,124 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:31,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:43:31,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:31,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:31,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:31,256 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:31,286 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:31,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:31,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:31,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272670953] [2020-09-17 02:43:31,287 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:31,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:31,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:31,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:31,288 INFO L87 Difference]: Start difference. First operand 91 states and 229 transitions. Second operand 28 states. [2020-09-17 02:43:33,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:33,602 INFO L93 Difference]: Finished difference Result 150 states and 347 transitions. [2020-09-17 02:43:33,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:43:33,603 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:33,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:33,604 INFO L225 Difference]: With dead ends: 150 [2020-09-17 02:43:33,604 INFO L226 Difference]: Without dead ends: 144 [2020-09-17 02:43:33,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=997, Invalid=2909, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:43:33,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-17 02:43:33,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 90. [2020-09-17 02:43:33,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 02:43:33,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 227 transitions. [2020-09-17 02:43:33,606 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 227 transitions. Word has length 31 [2020-09-17 02:43:33,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:33,607 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 227 transitions. [2020-09-17 02:43:33,607 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:33,607 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 227 transitions. [2020-09-17 02:43:33,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:33,607 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:33,607 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:33,807 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable297,294 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:33,808 INFO L427 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:33,808 INFO L82 PathProgramCache]: Analyzing trace with hash 239313689, now seen corresponding path program 297 times [2020-09-17 02:43:33,809 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:33,809 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507124510] [2020-09-17 02:43:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:33,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:34,541 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:34,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507124510] [2020-09-17 02:43:34,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037359415] [2020-09-17 02:43:34,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:34,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:43:34,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:34,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:34,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:34,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:34,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:34,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758698893] [2020-09-17 02:43:34,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:34,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:34,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:34,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=584, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:34,654 INFO L87 Difference]: Start difference. First operand 90 states and 227 transitions. Second operand 27 states. [2020-09-17 02:43:36,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:36,726 INFO L93 Difference]: Finished difference Result 151 states and 351 transitions. [2020-09-17 02:43:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:43:36,728 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:36,728 INFO L225 Difference]: With dead ends: 151 [2020-09-17 02:43:36,728 INFO L226 Difference]: Without dead ends: 145 [2020-09-17 02:43:36,729 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1012 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1072, Invalid=2960, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 02:43:36,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-17 02:43:36,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 93. [2020-09-17 02:43:36,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:43:36,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 235 transitions. [2020-09-17 02:43:36,731 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 235 transitions. Word has length 31 [2020-09-17 02:43:36,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:36,731 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 235 transitions. [2020-09-17 02:43:36,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:36,731 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 235 transitions. [2020-09-17 02:43:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:36,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:36,732 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:36,932 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable298,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:36,932 INFO L427 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:36,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:36,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1224505213, now seen corresponding path program 298 times [2020-09-17 02:43:36,933 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:36,933 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434084886] [2020-09-17 02:43:36,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:36,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:37,641 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:37,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434084886] [2020-09-17 02:43:37,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149402999] [2020-09-17 02:43:37,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:37,716 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:43:37,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:37,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:37,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:37,772 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:37,800 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:37,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:37,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:37,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401345055] [2020-09-17 02:43:37,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:37,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:37,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:37,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:37,803 INFO L87 Difference]: Start difference. First operand 93 states and 235 transitions. Second operand 28 states. [2020-09-17 02:43:40,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:40,404 INFO L93 Difference]: Finished difference Result 148 states and 345 transitions. [2020-09-17 02:43:40,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:43:40,406 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:40,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:40,406 INFO L225 Difference]: With dead ends: 148 [2020-09-17 02:43:40,406 INFO L226 Difference]: Without dead ends: 142 [2020-09-17 02:43:40,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1078, Invalid=3082, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 02:43:40,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-17 02:43:40,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 92. [2020-09-17 02:43:40,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:43:40,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 233 transitions. [2020-09-17 02:43:40,409 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 233 transitions. Word has length 31 [2020-09-17 02:43:40,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:40,410 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 233 transitions. [2020-09-17 02:43:40,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:40,410 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 233 transitions. [2020-09-17 02:43:40,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:40,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:40,410 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:40,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 296 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable299 [2020-09-17 02:43:40,618 INFO L427 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:40,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:40,619 INFO L82 PathProgramCache]: Analyzing trace with hash -392653829, now seen corresponding path program 299 times [2020-09-17 02:43:40,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:40,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974289035] [2020-09-17 02:43:40,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:41,339 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:41,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974289035] [2020-09-17 02:43:41,339 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848257940] [2020-09-17 02:43:41,339 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:41,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:43:41,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:41,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:41,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:41,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:41,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:41,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717664202] [2020-09-17 02:43:41,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:41,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:41,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:41,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:41,454 INFO L87 Difference]: Start difference. First operand 92 states and 233 transitions. Second operand 27 states. [2020-09-17 02:43:43,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:43,672 INFO L93 Difference]: Finished difference Result 149 states and 349 transitions. [2020-09-17 02:43:43,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:43:43,673 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:43,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:43,674 INFO L225 Difference]: With dead ends: 149 [2020-09-17 02:43:43,674 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 02:43:43,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1116 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1168, Invalid=3122, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 02:43:43,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 02:43:43,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 95. [2020-09-17 02:43:43,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 02:43:43,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-09-17 02:43:43,677 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 31 [2020-09-17 02:43:43,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:43,677 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-09-17 02:43:43,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:43,677 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-09-17 02:43:43,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:43,677 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:43,678 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:43,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2020-09-17 02:43:43,878 INFO L427 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:43,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:43,879 INFO L82 PathProgramCache]: Analyzing trace with hash 864235871, now seen corresponding path program 300 times [2020-09-17 02:43:43,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:43,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415463782] [2020-09-17 02:43:43,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:44,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415463782] [2020-09-17 02:43:44,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239819761] [2020-09-17 02:43:44,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:44,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:43:44,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:44,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:44,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:44,848 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:44,884 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:44,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:44,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:44,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175196572] [2020-09-17 02:43:44,885 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:44,885 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:44,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:44,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:44,885 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 28 states. [2020-09-17 02:43:47,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:47,599 INFO L93 Difference]: Finished difference Result 146 states and 343 transitions. [2020-09-17 02:43:47,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:43:47,601 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:47,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:47,601 INFO L225 Difference]: With dead ends: 146 [2020-09-17 02:43:47,601 INFO L226 Difference]: Without dead ends: 140 [2020-09-17 02:43:47,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1175, Invalid=3247, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 02:43:47,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-17 02:43:47,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 94. [2020-09-17 02:43:47,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:43:47,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 239 transitions. [2020-09-17 02:43:47,603 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 239 transitions. Word has length 31 [2020-09-17 02:43:47,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:47,603 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 239 transitions. [2020-09-17 02:43:47,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:47,604 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 239 transitions. [2020-09-17 02:43:47,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:47,604 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:47,604 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:47,804 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable301 [2020-09-17 02:43:47,805 INFO L427 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:47,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:47,805 INFO L82 PathProgramCache]: Analyzing trace with hash -1814538915, now seen corresponding path program 301 times [2020-09-17 02:43:47,806 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:47,806 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341244495] [2020-09-17 02:43:47,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:47,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:48,487 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:48,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341244495] [2020-09-17 02:43:48,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243158326] [2020-09-17 02:43:48,488 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:48,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:48,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:48,604 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:48,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:48,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:48,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315315619] [2020-09-17 02:43:48,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:48,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:48,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:48,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:48,605 INFO L87 Difference]: Start difference. First operand 94 states and 239 transitions. Second operand 27 states. [2020-09-17 02:43:51,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:51,090 INFO L93 Difference]: Finished difference Result 147 states and 347 transitions. [2020-09-17 02:43:51,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-17 02:43:51,092 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:51,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:51,093 INFO L225 Difference]: With dead ends: 147 [2020-09-17 02:43:51,093 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 02:43:51,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1280, Invalid=3276, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 02:43:51,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 02:43:51,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 97. [2020-09-17 02:43:51,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 02:43:51,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 247 transitions. [2020-09-17 02:43:51,096 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 247 transitions. Word has length 31 [2020-09-17 02:43:51,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:51,096 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 247 transitions. [2020-09-17 02:43:51,096 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:51,096 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 247 transitions. [2020-09-17 02:43:51,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:51,096 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:51,096 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:51,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable302,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:51,297 INFO L427 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:51,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:51,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1294795839, now seen corresponding path program 302 times [2020-09-17 02:43:51,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:51,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513581943] [2020-09-17 02:43:51,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:52,034 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:52,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513581943] [2020-09-17 02:43:52,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218650986] [2020-09-17 02:43:52,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:52,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:43:52,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:52,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:52,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:52,162 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:52,199 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:52,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:52,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:52,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090977489] [2020-09-17 02:43:52,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:52,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:52,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:52,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=627, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:52,200 INFO L87 Difference]: Start difference. First operand 97 states and 247 transitions. Second operand 28 states. [2020-09-17 02:43:55,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:55,133 INFO L93 Difference]: Finished difference Result 144 states and 341 transitions. [2020-09-17 02:43:55,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 02:43:55,135 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:43:55,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:55,135 INFO L225 Difference]: With dead ends: 144 [2020-09-17 02:43:55,135 INFO L226 Difference]: Without dead ends: 138 [2020-09-17 02:43:55,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1288, Invalid=3404, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 02:43:55,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-17 02:43:55,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 96. [2020-09-17 02:43:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 02:43:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-09-17 02:43:55,138 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 31 [2020-09-17 02:43:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:55,138 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-09-17 02:43:55,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:43:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-09-17 02:43:55,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:55,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:55,138 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:55,339 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable303 [2020-09-17 02:43:55,339 INFO L427 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:55,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:55,340 INFO L82 PathProgramCache]: Analyzing trace with hash 360515391, now seen corresponding path program 303 times [2020-09-17 02:43:55,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:55,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124879985] [2020-09-17 02:43:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:55,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:56,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124879985] [2020-09-17 02:43:56,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958401913] [2020-09-17 02:43:56,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:56,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:43:56,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:56,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:56,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:56,188 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:56,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:56,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:43:56,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946445025] [2020-09-17 02:43:56,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:43:56,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:56,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:43:56,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=563, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:43:56,189 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 27 states. [2020-09-17 02:43:58,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:43:58,752 INFO L93 Difference]: Finished difference Result 145 states and 345 transitions. [2020-09-17 02:43:58,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 02:43:58,754 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:43:58,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:43:58,755 INFO L225 Difference]: With dead ends: 145 [2020-09-17 02:43:58,755 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 02:43:58,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1336 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1408, Invalid=3422, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 02:43:58,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 02:43:58,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 99. [2020-09-17 02:43:58,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:43:58,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 253 transitions. [2020-09-17 02:43:58,757 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 253 transitions. Word has length 31 [2020-09-17 02:43:58,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:43:58,757 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 253 transitions. [2020-09-17 02:43:58,757 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:43:58,757 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 253 transitions. [2020-09-17 02:43:58,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:43:58,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:43:58,758 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:43:58,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:58,958 INFO L427 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:43:58,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:43:58,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1359612253, now seen corresponding path program 304 times [2020-09-17 02:43:58,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:43:58,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819793873] [2020-09-17 02:43:58,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:43:58,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:43:59,609 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:59,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819793873] [2020-09-17 02:43:59,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503655151] [2020-09-17 02:43:59,610 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:43:59,678 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:43:59,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:43:59,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:43:59,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:43:59,728 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:43:59,761 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:43:59,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:43:59,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:43:59,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477686292] [2020-09-17 02:43:59,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:43:59,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:43:59,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:43:59,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:43:59,763 INFO L87 Difference]: Start difference. First operand 99 states and 253 transitions. Second operand 28 states. [2020-09-17 02:44:02,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:02,594 INFO L93 Difference]: Finished difference Result 142 states and 339 transitions. [2020-09-17 02:44:02,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 02:44:02,596 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:44:02,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:02,597 INFO L225 Difference]: With dead ends: 142 [2020-09-17 02:44:02,597 INFO L226 Difference]: Without dead ends: 136 [2020-09-17 02:44:02,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1417, Invalid=3553, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 02:44:02,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-17 02:44:02,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2020-09-17 02:44:02,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:44:02,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 251 transitions. [2020-09-17 02:44:02,599 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 251 transitions. Word has length 31 [2020-09-17 02:44:02,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:02,599 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 251 transitions. [2020-09-17 02:44:02,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:02,599 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 251 transitions. [2020-09-17 02:44:02,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:44:02,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:02,599 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:02,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable305 [2020-09-17 02:44:02,800 INFO L427 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:02,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:02,801 INFO L82 PathProgramCache]: Analyzing trace with hash -888616543, now seen corresponding path program 305 times [2020-09-17 02:44:02,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:02,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141396590] [2020-09-17 02:44:02,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:02,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:03,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141396590] [2020-09-17 02:44:03,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075416313] [2020-09-17 02:44:03,516 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:03,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:44:03,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:03,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:44:03,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:03,637 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:03,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:03,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:44:03,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997212660] [2020-09-17 02:44:03,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:44:03,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:03,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:44:03,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=154, Invalid=548, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:44:03,638 INFO L87 Difference]: Start difference. First operand 98 states and 251 transitions. Second operand 27 states. [2020-09-17 02:44:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:06,217 INFO L93 Difference]: Finished difference Result 143 states and 343 transitions. [2020-09-17 02:44:06,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-17 02:44:06,219 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:44:06,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:06,219 INFO L225 Difference]: With dead ends: 143 [2020-09-17 02:44:06,220 INFO L226 Difference]: Without dead ends: 137 [2020-09-17 02:44:06,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1552, Invalid=3560, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 02:44:06,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-09-17 02:44:06,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 101. [2020-09-17 02:44:06,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 02:44:06,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 259 transitions. [2020-09-17 02:44:06,222 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 259 transitions. Word has length 31 [2020-09-17 02:44:06,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:06,222 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 259 transitions. [2020-09-17 02:44:06,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:44:06,222 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 259 transitions. [2020-09-17 02:44:06,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:44:06,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:06,223 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:06,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable306,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:06,423 INFO L427 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:06,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:06,424 INFO L82 PathProgramCache]: Analyzing trace with hash -872529403, now seen corresponding path program 306 times [2020-09-17 02:44:06,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:06,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213997287] [2020-09-17 02:44:06,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:06,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:07,063 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:07,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213997287] [2020-09-17 02:44:07,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844899678] [2020-09-17 02:44:07,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:07,141 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:44:07,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:07,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:44:07,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:07,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:07,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:07,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:44:07,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819514232] [2020-09-17 02:44:07,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:07,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:07,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:07,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:07,228 INFO L87 Difference]: Start difference. First operand 101 states and 259 transitions. Second operand 28 states. [2020-09-17 02:44:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:10,417 INFO L93 Difference]: Finished difference Result 140 states and 337 transitions. [2020-09-17 02:44:10,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 02:44:10,419 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:44:10,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:10,420 INFO L225 Difference]: With dead ends: 140 [2020-09-17 02:44:10,420 INFO L226 Difference]: Without dead ends: 134 [2020-09-17 02:44:10,420 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1453 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1562, Invalid=3694, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 02:44:10,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-09-17 02:44:10,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 100. [2020-09-17 02:44:10,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 02:44:10,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 257 transitions. [2020-09-17 02:44:10,422 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 257 transitions. Word has length 31 [2020-09-17 02:44:10,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:10,422 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 257 transitions. [2020-09-17 02:44:10,422 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:10,422 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 257 transitions. [2020-09-17 02:44:10,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:44:10,422 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:10,423 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:10,623 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable307,304 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:10,623 INFO L427 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:10,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:10,624 INFO L82 PathProgramCache]: Analyzing trace with hash -872039293, now seen corresponding path program 307 times [2020-09-17 02:44:10,624 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:10,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158206439] [2020-09-17 02:44:10,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:10,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:11,429 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:11,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158206439] [2020-09-17 02:44:11,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555217600] [2020-09-17 02:44:11,429 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:11,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:11,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:44:11,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:11,559 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:11,560 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:11,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2020-09-17 02:44:11,560 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682010833] [2020-09-17 02:44:11,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-17 02:44:11,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:11,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-17 02:44:11,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-09-17 02:44:11,561 INFO L87 Difference]: Start difference. First operand 100 states and 257 transitions. Second operand 27 states. [2020-09-17 02:44:14,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:14,637 INFO L93 Difference]: Finished difference Result 160 states and 387 transitions. [2020-09-17 02:44:14,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-17 02:44:14,639 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-09-17 02:44:14,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:14,639 INFO L225 Difference]: With dead ends: 160 [2020-09-17 02:44:14,640 INFO L226 Difference]: Without dead ends: 154 [2020-09-17 02:44:14,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1572 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1712, Invalid=3690, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 02:44:14,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-17 02:44:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 106. [2020-09-17 02:44:14,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-17 02:44:14,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 277 transitions. [2020-09-17 02:44:14,648 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 277 transitions. Word has length 31 [2020-09-17 02:44:14,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:14,648 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 277 transitions. [2020-09-17 02:44:14,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-17 02:44:14,648 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 277 transitions. [2020-09-17 02:44:14,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-17 02:44:14,649 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:14,649 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:14,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable308 [2020-09-17 02:44:14,850 INFO L427 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:14,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:14,850 INFO L82 PathProgramCache]: Analyzing trace with hash -872022553, now seen corresponding path program 308 times [2020-09-17 02:44:14,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:14,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425480590] [2020-09-17 02:44:14,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:15,575 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:15,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425480590] [2020-09-17 02:44:15,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344807645] [2020-09-17 02:44:15,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:15,645 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:44:15,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:15,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 27 conjunts are in the unsatisfiable core [2020-09-17 02:44:15,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:15,697 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:15,735 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:15,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:15,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-09-17 02:44:15,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691738544] [2020-09-17 02:44:15,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:15,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:15,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:15,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=579, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:15,737 INFO L87 Difference]: Start difference. First operand 106 states and 277 transitions. Second operand 28 states. [2020-09-17 02:44:19,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:19,093 INFO L93 Difference]: Finished difference Result 141 states and 343 transitions. [2020-09-17 02:44:19,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 02:44:19,094 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-09-17 02:44:19,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:19,095 INFO L225 Difference]: With dead ends: 141 [2020-09-17 02:44:19,095 INFO L226 Difference]: Without dead ends: 133 [2020-09-17 02:44:19,096 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1723, Invalid=3827, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 02:44:19,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-17 02:44:19,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 103. [2020-09-17 02:44:19,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-17 02:44:19,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-09-17 02:44:19,098 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-09-17 02:44:19,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:19,098 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-09-17 02:44:19,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:19,098 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-09-17 02:44:19,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:19,099 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:19,099 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:19,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable309,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:19,300 INFO L427 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:19,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:19,300 INFO L82 PathProgramCache]: Analyzing trace with hash 470887608, now seen corresponding path program 309 times [2020-09-17 02:44:19,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:19,301 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481810173] [2020-09-17 02:44:19,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:19,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:20,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481810173] [2020-09-17 02:44:20,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303022025] [2020-09-17 02:44:20,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:20,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:44:20,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:20,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:20,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:20,326 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:20,326 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:20,326 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:44:20,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448339236] [2020-09-17 02:44:20,327 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:20,327 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:20,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:20,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:20,327 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 28 states. [2020-09-17 02:44:21,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:21,803 INFO L93 Difference]: Finished difference Result 164 states and 387 transitions. [2020-09-17 02:44:21,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:44:21,805 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:44:21,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:21,805 INFO L225 Difference]: With dead ends: 164 [2020-09-17 02:44:21,806 INFO L226 Difference]: Without dead ends: 158 [2020-09-17 02:44:21,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=841, Invalid=1915, Unknown=0, NotChecked=0, Total=2756 [2020-09-17 02:44:21,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-17 02:44:21,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 105. [2020-09-17 02:44:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:44:21,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:44:21,808 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:44:21,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:21,808 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:44:21,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:21,808 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:44:21,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:21,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:21,809 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:22,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2020-09-17 02:44:22,010 INFO L427 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:22,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:22,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1353020644, now seen corresponding path program 310 times [2020-09-17 02:44:22,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:22,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409937508] [2020-09-17 02:44:22,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:22,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:23,065 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:23,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409937508] [2020-09-17 02:44:23,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923013246] [2020-09-17 02:44:23,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:23,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:44:23,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:23,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:23,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:23,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:23,212 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:23,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:23,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:44:23,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495999531] [2020-09-17 02:44:23,213 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:44:23,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:23,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:44:23,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:44:23,213 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:44:25,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:25,081 INFO L93 Difference]: Finished difference Result 161 states and 381 transitions. [2020-09-17 02:44:25,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:44:25,083 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:44:25,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:25,083 INFO L225 Difference]: With dead ends: 161 [2020-09-17 02:44:25,084 INFO L226 Difference]: Without dead ends: 155 [2020-09-17 02:44:25,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=897, Invalid=2183, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:44:25,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-17 02:44:25,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 104. [2020-09-17 02:44:25,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:44:25,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:44:25,086 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:44:25,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:25,086 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:44:25,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:44:25,086 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:44:25,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:25,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:25,087 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:25,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable311 [2020-09-17 02:44:25,288 INFO L427 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:25,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:25,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2116672154, now seen corresponding path program 311 times [2020-09-17 02:44:25,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:25,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361054442] [2020-09-17 02:44:25,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:25,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:26,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361054442] [2020-09-17 02:44:26,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736164508] [2020-09-17 02:44:26,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:26,272 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:44:26,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:26,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:26,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:26,296 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:26,297 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:26,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:44:26,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827686377] [2020-09-17 02:44:26,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:26,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:26,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:26,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:26,298 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:44:27,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:27,821 INFO L93 Difference]: Finished difference Result 158 states and 375 transitions. [2020-09-17 02:44:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:44:27,823 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:44:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:27,824 INFO L225 Difference]: With dead ends: 158 [2020-09-17 02:44:27,824 INFO L226 Difference]: Without dead ends: 152 [2020-09-17 02:44:27,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=842, Invalid=2128, Unknown=0, NotChecked=0, Total=2970 [2020-09-17 02:44:27,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-17 02:44:27,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 105. [2020-09-17 02:44:27,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:44:27,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:44:27,827 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:44:27,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:27,827 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:44:27,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:27,827 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:44:27,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:27,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:27,827 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:28,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2020-09-17 02:44:28,028 INFO L427 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:28,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:28,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1077903870, now seen corresponding path program 312 times [2020-09-17 02:44:28,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:28,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353671205] [2020-09-17 02:44:28,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:28,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:28,866 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:28,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353671205] [2020-09-17 02:44:28,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708141311] [2020-09-17 02:44:28,867 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:28,942 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:44:28,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:28,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:28,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:28,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:29,021 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:29,022 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:29,022 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:44:29,022 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611236179] [2020-09-17 02:44:29,022 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:44:29,022 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:29,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:44:29,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:44:29,023 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:44:30,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:30,803 INFO L93 Difference]: Finished difference Result 157 states and 373 transitions. [2020-09-17 02:44:30,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:44:30,805 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:44:30,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:30,805 INFO L225 Difference]: With dead ends: 157 [2020-09-17 02:44:30,805 INFO L226 Difference]: Without dead ends: 151 [2020-09-17 02:44:30,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 652 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=905, Invalid=2401, Unknown=0, NotChecked=0, Total=3306 [2020-09-17 02:44:30,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-17 02:44:30,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 104. [2020-09-17 02:44:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:44:30,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:44:30,808 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:44:30,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:30,808 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:44:30,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:44:30,808 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:44:30,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:30,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:30,809 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:31,009 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable313 [2020-09-17 02:44:31,009 INFO L427 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:31,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:31,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1492687100, now seen corresponding path program 313 times [2020-09-17 02:44:31,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:31,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196939741] [2020-09-17 02:44:31,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:31,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:31,810 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:31,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196939741] [2020-09-17 02:44:31,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289971616] [2020-09-17 02:44:31,811 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:31,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:31,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:31,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:31,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:44:31,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176204794] [2020-09-17 02:44:31,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:31,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:31,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:31,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:31,903 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:44:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:33,526 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-09-17 02:44:33,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:44:33,528 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:44:33,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:33,529 INFO L225 Difference]: With dead ends: 154 [2020-09-17 02:44:33,529 INFO L226 Difference]: Without dead ends: 148 [2020-09-17 02:44:33,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 626 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=859, Invalid=2333, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:44:33,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-17 02:44:33,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 105. [2020-09-17 02:44:33,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:44:33,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:44:33,531 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:44:33,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:33,531 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:44:33,531 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:33,532 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:44:33,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:33,532 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:33,532 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:33,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable314,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:33,733 INFO L427 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:33,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:33,733 INFO L82 PathProgramCache]: Analyzing trace with hash -229062304, now seen corresponding path program 314 times [2020-09-17 02:44:33,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:33,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527212810] [2020-09-17 02:44:33,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:33,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:34,560 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:34,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527212810] [2020-09-17 02:44:34,560 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034475735] [2020-09-17 02:44:34,560 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:34,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:44:34,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:34,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:34,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:34,675 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:34,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:34,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:44:34,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399723335] [2020-09-17 02:44:34,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:44:34,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:34,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:44:34,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:44:34,698 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:44:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:36,669 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-09-17 02:44:36,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:44:36,671 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:44:36,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:36,671 INFO L225 Difference]: With dead ends: 153 [2020-09-17 02:44:36,671 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 02:44:36,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=929, Invalid=2611, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:44:36,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 02:44:36,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 104. [2020-09-17 02:44:36,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:44:36,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:44:36,674 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:44:36,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:36,674 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:44:36,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:44:36,674 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:44:36,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:36,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:36,675 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:36,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable315 [2020-09-17 02:44:36,875 INFO L427 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:36,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:36,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1412986914, now seen corresponding path program 315 times [2020-09-17 02:44:36,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:36,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116167084] [2020-09-17 02:44:36,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:36,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:37,655 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:37,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116167084] [2020-09-17 02:44:37,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1641904293] [2020-09-17 02:44:37,656 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:37,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:44:37,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:37,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:37,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:37,761 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:37,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:37,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:44:37,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151826683] [2020-09-17 02:44:37,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:37,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:37,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:37,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:37,762 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:44:39,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:39,502 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-09-17 02:44:39,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:44:39,504 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:44:39,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:39,505 INFO L225 Difference]: With dead ends: 150 [2020-09-17 02:44:39,505 INFO L226 Difference]: Without dead ends: 144 [2020-09-17 02:44:39,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=892, Invalid=2530, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:44:39,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-17 02:44:39,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 105. [2020-09-17 02:44:39,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:44:39,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:44:39,508 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:44:39,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:39,508 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:44:39,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:39,508 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:44:39,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:39,513 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:39,513 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:39,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2020-09-17 02:44:39,714 INFO L427 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:39,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:39,714 INFO L82 PathProgramCache]: Analyzing trace with hash 1333821762, now seen corresponding path program 316 times [2020-09-17 02:44:39,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:39,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76253612] [2020-09-17 02:44:39,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:39,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:40,512 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:40,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76253612] [2020-09-17 02:44:40,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110523242] [2020-09-17 02:44:40,512 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:40,578 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:44:40,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:40,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:40,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:40,631 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:40,657 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:40,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:40,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:44:40,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755382427] [2020-09-17 02:44:40,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:44:40,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:40,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:44:40,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:44:40,658 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:44:42,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:42,790 INFO L93 Difference]: Finished difference Result 149 states and 357 transitions. [2020-09-17 02:44:42,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:44:42,792 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:44:42,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:42,793 INFO L225 Difference]: With dead ends: 149 [2020-09-17 02:44:42,793 INFO L226 Difference]: Without dead ends: 143 [2020-09-17 02:44:42,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=969, Invalid=2813, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:44:42,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-09-17 02:44:42,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 104. [2020-09-17 02:44:42,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:44:42,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:44:42,795 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:44:42,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:42,795 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:44:42,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:44:42,796 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:44:42,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:42,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:42,796 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:42,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable317 [2020-09-17 02:44:42,997 INFO L427 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:42,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:42,998 INFO L82 PathProgramCache]: Analyzing trace with hash 32032576, now seen corresponding path program 317 times [2020-09-17 02:44:42,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:42,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223874818] [2020-09-17 02:44:42,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:43,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:43,767 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:43,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223874818] [2020-09-17 02:44:43,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550716055] [2020-09-17 02:44:43,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:43,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:44:43,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:43,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:43,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:43,876 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:43,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:43,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:44:43,877 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146902555] [2020-09-17 02:44:43,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:43,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:43,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:43,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:43,877 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:44:46,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:46,038 INFO L93 Difference]: Finished difference Result 146 states and 351 transitions. [2020-09-17 02:44:46,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:44:46,040 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:44:46,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:46,041 INFO L225 Difference]: With dead ends: 146 [2020-09-17 02:44:46,041 INFO L226 Difference]: Without dead ends: 140 [2020-09-17 02:44:46,042 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=941, Invalid=2719, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:44:46,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-17 02:44:46,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 105. [2020-09-17 02:44:46,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:44:46,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:44:46,044 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:44:46,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:46,045 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:44:46,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:46,045 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:44:46,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:46,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:46,045 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:46,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable318,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:46,246 INFO L427 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:46,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:46,246 INFO L82 PathProgramCache]: Analyzing trace with hash -778516060, now seen corresponding path program 318 times [2020-09-17 02:44:46,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:46,247 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35803250] [2020-09-17 02:44:46,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:47,218 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:47,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35803250] [2020-09-17 02:44:47,218 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839971024] [2020-09-17 02:44:47,218 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:47,293 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:44:47,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:47,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:47,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:47,359 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:47,390 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:47,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:47,391 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:44:47,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29746211] [2020-09-17 02:44:47,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:44:47,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:47,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:44:47,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:44:47,391 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:44:50,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:50,215 INFO L93 Difference]: Finished difference Result 145 states and 349 transitions. [2020-09-17 02:44:50,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:44:50,218 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:44:50,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:50,218 INFO L225 Difference]: With dead ends: 145 [2020-09-17 02:44:50,218 INFO L226 Difference]: Without dead ends: 139 [2020-09-17 02:44:50,218 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 898 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1025, Invalid=3007, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 02:44:50,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-09-17 02:44:50,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 104. [2020-09-17 02:44:50,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:44:50,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:44:50,221 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:44:50,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:50,221 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:44:50,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:44:50,221 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:44:50,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:50,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:50,222 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:50,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable319,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:50,423 INFO L427 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:50,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:50,423 INFO L82 PathProgramCache]: Analyzing trace with hash -726239454, now seen corresponding path program 319 times [2020-09-17 02:44:50,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:50,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660411634] [2020-09-17 02:44:50,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:51,368 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:51,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660411634] [2020-09-17 02:44:51,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417659990] [2020-09-17 02:44:51,369 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:51,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:51,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:51,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:51,479 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:51,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:51,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:44:51,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087678591] [2020-09-17 02:44:51,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:51,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:51,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:51,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:51,480 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:44:54,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:54,085 INFO L93 Difference]: Finished difference Result 142 states and 343 transitions. [2020-09-17 02:44:54,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:44:54,087 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:44:54,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:54,088 INFO L225 Difference]: With dead ends: 142 [2020-09-17 02:44:54,088 INFO L226 Difference]: Without dead ends: 136 [2020-09-17 02:44:54,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 881 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1006, Invalid=2900, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:44:54,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-09-17 02:44:54,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 105. [2020-09-17 02:44:54,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:44:54,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:44:54,091 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:44:54,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:54,091 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:44:54,091 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:44:54,091 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:44:54,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:54,091 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:54,091 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:54,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2020-09-17 02:44:54,292 INFO L427 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:54,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:54,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1150009990, now seen corresponding path program 320 times [2020-09-17 02:44:54,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:54,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557573393] [2020-09-17 02:44:54,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:54,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:55,236 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:55,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557573393] [2020-09-17 02:44:55,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748671844] [2020-09-17 02:44:55,237 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:55,302 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:44:55,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:55,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:55,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:55,370 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:44:55,405 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:55,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:55,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:44:55,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042539603] [2020-09-17 02:44:55,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:44:55,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:55,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:44:55,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:44:55,407 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:44:58,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:44:58,588 INFO L93 Difference]: Finished difference Result 141 states and 341 transitions. [2020-09-17 02:44:58,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:44:58,590 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:44:58,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:44:58,590 INFO L225 Difference]: With dead ends: 141 [2020-09-17 02:44:58,591 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 02:44:58,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1097, Invalid=3193, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 02:44:58,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 02:44:58,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 104. [2020-09-17 02:44:58,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:44:58,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:44:58,593 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:44:58,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:44:58,593 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:44:58,593 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:44:58,593 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:44:58,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:44:58,594 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:44:58,594 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:44:58,794 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2020-09-17 02:44:58,795 INFO L427 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:44:58,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:44:58,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1838331780, now seen corresponding path program 321 times [2020-09-17 02:44:58,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:44:58,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148337233] [2020-09-17 02:44:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:44:58,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:44:59,692 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:59,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148337233] [2020-09-17 02:44:59,692 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327570043] [2020-09-17 02:44:59,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:44:59,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:44:59,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:44:59,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:44:59,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:44:59,811 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:44:59,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:44:59,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:44:59,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970282800] [2020-09-17 02:44:59,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:44:59,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:44:59,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:44:59,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=630, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:44:59,812 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:45:02,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:02,582 INFO L93 Difference]: Finished difference Result 138 states and 335 transitions. [2020-09-17 02:45:02,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:45:02,584 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:45:02,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:02,585 INFO L225 Difference]: With dead ends: 138 [2020-09-17 02:45:02,585 INFO L226 Difference]: Without dead ends: 132 [2020-09-17 02:45:02,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 974 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1087, Invalid=3073, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 02:45:02,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-17 02:45:02,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 105. [2020-09-17 02:45:02,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:45:02,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:45:02,587 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:45:02,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:02,588 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:45:02,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:45:02,588 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:45:02,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:02,588 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:02,588 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:02,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2020-09-17 02:45:02,789 INFO L427 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:02,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:02,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1471443992, now seen corresponding path program 322 times [2020-09-17 02:45:02,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:02,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080713783] [2020-09-17 02:45:02,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:02,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:03,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080713783] [2020-09-17 02:45:03,744 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964365459] [2020-09-17 02:45:03,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:03,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:45:03,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:03,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:03,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:03,885 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:45:03,918 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:03,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:03,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:45:03,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328880177] [2020-09-17 02:45:03,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:45:03,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:03,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:45:03,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=687, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:45:03,919 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:45:07,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:07,058 INFO L93 Difference]: Finished difference Result 137 states and 333 transitions. [2020-09-17 02:45:07,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:45:07,060 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:45:07,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:07,060 INFO L225 Difference]: With dead ends: 137 [2020-09-17 02:45:07,060 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:45:07,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1185, Invalid=3371, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 02:45:07,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:45:07,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 104. [2020-09-17 02:45:07,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:45:07,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:45:07,063 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:45:07,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:07,063 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:45:07,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:45:07,063 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:45:07,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:07,064 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:07,064 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:07,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2020-09-17 02:45:07,271 INFO L427 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:07,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1206364262, now seen corresponding path program 323 times [2020-09-17 02:45:07,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:07,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96318263] [2020-09-17 02:45:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:07,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:08,055 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:08,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96318263] [2020-09-17 02:45:08,056 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723333538] [2020-09-17 02:45:08,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:08,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:45:08,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:08,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:08,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:08,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:08,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:45:08,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059389070] [2020-09-17 02:45:08,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:45:08,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:08,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:45:08,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:45:08,173 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:45:10,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:10,806 INFO L93 Difference]: Finished difference Result 134 states and 327 transitions. [2020-09-17 02:45:10,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:45:10,808 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:45:10,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:10,809 INFO L225 Difference]: With dead ends: 134 [2020-09-17 02:45:10,809 INFO L226 Difference]: Without dead ends: 128 [2020-09-17 02:45:10,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1184, Invalid=3238, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 02:45:10,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-17 02:45:10,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 105. [2020-09-17 02:45:10,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:45:10,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:45:10,812 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:45:10,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:10,813 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:45:10,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:45:10,813 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:45:10,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:10,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:10,813 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:11,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:11,014 INFO L427 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:11,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:11,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1831713334, now seen corresponding path program 324 times [2020-09-17 02:45:11,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:11,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031203389] [2020-09-17 02:45:11,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:11,887 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:11,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031203389] [2020-09-17 02:45:11,888 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394877898] [2020-09-17 02:45:11,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:11,961 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:45:11,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:11,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:11,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:12,020 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:45:12,052 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:12,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:12,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:45:12,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487972696] [2020-09-17 02:45:12,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:45:12,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:12,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:45:12,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=682, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:45:12,060 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:45:15,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:15,310 INFO L93 Difference]: Finished difference Result 133 states and 325 transitions. [2020-09-17 02:45:15,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 02:45:15,313 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:45:15,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:15,313 INFO L225 Difference]: With dead ends: 133 [2020-09-17 02:45:15,313 INFO L226 Difference]: Without dead ends: 127 [2020-09-17 02:45:15,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1180 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1289, Invalid=3541, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 02:45:15,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-17 02:45:15,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 104. [2020-09-17 02:45:15,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:45:15,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:45:15,316 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:45:15,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:15,316 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:45:15,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:45:15,316 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:45:15,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:15,316 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:15,317 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:15,517 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable325 [2020-09-17 02:45:15,517 INFO L427 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:15,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:15,518 INFO L82 PathProgramCache]: Analyzing trace with hash -215520824, now seen corresponding path program 325 times [2020-09-17 02:45:15,518 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:15,518 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469316408] [2020-09-17 02:45:15,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:16,299 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:16,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469316408] [2020-09-17 02:45:16,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873462256] [2020-09-17 02:45:16,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:16,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:16,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:16,424 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:16,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:16,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:45:16,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599351618] [2020-09-17 02:45:16,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:45:16,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:16,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:45:16,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:45:16,425 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:45:19,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:19,242 INFO L93 Difference]: Finished difference Result 130 states and 319 transitions. [2020-09-17 02:45:19,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-17 02:45:19,244 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:45:19,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:19,244 INFO L225 Difference]: With dead ends: 130 [2020-09-17 02:45:19,244 INFO L226 Difference]: Without dead ends: 124 [2020-09-17 02:45:19,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1172 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1297, Invalid=3395, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 02:45:19,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-17 02:45:19,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 105. [2020-09-17 02:45:19,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:45:19,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:45:19,247 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:45:19,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:19,247 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:45:19,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:45:19,247 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:45:19,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:19,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:19,248 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:19,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable326,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:19,449 INFO L427 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:19,449 INFO L82 PathProgramCache]: Analyzing trace with hash 304222252, now seen corresponding path program 326 times [2020-09-17 02:45:19,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:19,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358783679] [2020-09-17 02:45:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:20,306 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:20,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358783679] [2020-09-17 02:45:20,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130695767] [2020-09-17 02:45:20,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:20,375 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:45:20,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:20,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:20,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:20,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:45:20,470 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:20,470 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:20,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:45:20,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311023871] [2020-09-17 02:45:20,471 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:45:20,471 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:20,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:45:20,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:45:20,471 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:45:24,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:24,071 INFO L93 Difference]: Finished difference Result 129 states and 317 transitions. [2020-09-17 02:45:24,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 02:45:24,073 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:45:24,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:24,074 INFO L225 Difference]: With dead ends: 129 [2020-09-17 02:45:24,074 INFO L226 Difference]: Without dead ends: 123 [2020-09-17 02:45:24,075 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1282 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1409, Invalid=3703, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 02:45:24,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-17 02:45:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 104. [2020-09-17 02:45:24,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:45:24,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:45:24,077 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:45:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:24,077 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:45:24,077 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:45:24,077 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:45:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:24,078 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:24,078 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:24,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 324 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable327 [2020-09-17 02:45:24,278 INFO L427 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:24,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:24,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1959533482, now seen corresponding path program 327 times [2020-09-17 02:45:24,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:24,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609392988] [2020-09-17 02:45:24,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:24,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:25,154 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:25,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609392988] [2020-09-17 02:45:25,154 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037625268] [2020-09-17 02:45:25,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:25,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:45:25,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:25,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:25,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:25,278 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:25,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:25,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:45:25,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054945041] [2020-09-17 02:45:25,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:45:25,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:25,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:45:25,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=606, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:45:25,280 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:45:28,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:28,228 INFO L93 Difference]: Finished difference Result 126 states and 311 transitions. [2020-09-17 02:45:28,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 02:45:28,230 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:45:28,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:28,231 INFO L225 Difference]: With dead ends: 126 [2020-09-17 02:45:28,231 INFO L226 Difference]: Without dead ends: 120 [2020-09-17 02:45:28,232 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1426, Invalid=3544, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 02:45:28,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-17 02:45:28,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 105. [2020-09-17 02:45:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:45:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:45:28,234 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:45:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:28,234 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:45:28,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:45:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:45:28,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:28,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:28,239 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:28,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable328,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:28,440 INFO L427 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:28,440 INFO L82 PathProgramCache]: Analyzing trace with hash 239405838, now seen corresponding path program 328 times [2020-09-17 02:45:28,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:28,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710964413] [2020-09-17 02:45:28,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:28,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:29,200 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:29,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710964413] [2020-09-17 02:45:29,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161614907] [2020-09-17 02:45:29,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:29,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:45:29,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:29,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:29,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:29,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:45:29,372 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:29,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:29,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:45:29,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065445811] [2020-09-17 02:45:29,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:45:29,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:29,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:45:29,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:45:29,374 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:45:32,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:32,948 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-09-17 02:45:32,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 02:45:32,950 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:45:32,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:32,951 INFO L225 Difference]: With dead ends: 125 [2020-09-17 02:45:32,951 INFO L226 Difference]: Without dead ends: 119 [2020-09-17 02:45:32,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1388 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1545, Invalid=3857, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 02:45:32,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-17 02:45:32,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 104. [2020-09-17 02:45:32,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:45:32,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:45:32,953 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:45:32,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:32,954 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:45:32,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:45:32,954 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:45:32,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:32,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:32,954 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:33,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable329 [2020-09-17 02:45:33,155 INFO L427 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:33,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:33,155 INFO L82 PathProgramCache]: Analyzing trace with hash 710401548, now seen corresponding path program 329 times [2020-09-17 02:45:33,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:33,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113522941] [2020-09-17 02:45:33,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:33,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:33,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113522941] [2020-09-17 02:45:33,964 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867369052] [2020-09-17 02:45:33,965 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:34,045 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-09-17 02:45:34,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:34,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:34,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:34,105 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:34,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:34,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:45:34,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900025528] [2020-09-17 02:45:34,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:45:34,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:34,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:45:34,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=590, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:45:34,107 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:45:37,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:37,369 INFO L93 Difference]: Finished difference Result 122 states and 303 transitions. [2020-09-17 02:45:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-17 02:45:37,371 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:45:37,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:37,371 INFO L225 Difference]: With dead ends: 122 [2020-09-17 02:45:37,371 INFO L226 Difference]: Without dead ends: 116 [2020-09-17 02:45:37,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1571, Invalid=3685, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 02:45:37,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-17 02:45:37,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 105. [2020-09-17 02:45:37,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:45:37,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:45:37,374 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 32 [2020-09-17 02:45:37,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:37,374 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:45:37,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:45:37,375 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:45:37,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:37,375 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:37,375 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:37,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable330,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:37,576 INFO L427 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:37,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:37,576 INFO L82 PathProgramCache]: Analyzing trace with hash 726488688, now seen corresponding path program 330 times [2020-09-17 02:45:37,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:37,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189169330] [2020-09-17 02:45:37,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:37,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:38,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189169330] [2020-09-17 02:45:38,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081046226] [2020-09-17 02:45:38,396 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:38,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-09-17 02:45:38,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:38,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:38,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:38,539 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:45:38,581 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:38,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:38,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:45:38,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293210813] [2020-09-17 02:45:38,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:45:38,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:38,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:45:38,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=643, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:45:38,583 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 29 states. [2020-09-17 02:45:42,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:42,575 INFO L93 Difference]: Finished difference Result 121 states and 301 transitions. [2020-09-17 02:45:42,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 02:45:42,577 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:45:42,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:42,577 INFO L225 Difference]: With dead ends: 121 [2020-09-17 02:45:42,578 INFO L226 Difference]: Without dead ends: 115 [2020-09-17 02:45:42,578 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1697, Invalid=4003, Unknown=0, NotChecked=0, Total=5700 [2020-09-17 02:45:42,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-17 02:45:42,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 104. [2020-09-17 02:45:42,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:45:42,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:45:42,580 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 32 [2020-09-17 02:45:42,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:42,581 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:45:42,581 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:45:42,581 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:45:42,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:42,581 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:42,581 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:42,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable331,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:42,782 INFO L427 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:42,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:42,782 INFO L82 PathProgramCache]: Analyzing trace with hash 726978798, now seen corresponding path program 331 times [2020-09-17 02:45:42,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:42,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996903436] [2020-09-17 02:45:42,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:42,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:43,645 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:43,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996903436] [2020-09-17 02:45:43,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322627694] [2020-09-17 02:45:43,646 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:43,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:43,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:43,775 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:43,775 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:43,775 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-09-17 02:45:43,776 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141922638] [2020-09-17 02:45:43,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-09-17 02:45:43,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:43,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-09-17 02:45:43,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=186, Invalid=570, Unknown=0, NotChecked=0, Total=756 [2020-09-17 02:45:43,776 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 28 states. [2020-09-17 02:45:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:47,222 INFO L93 Difference]: Finished difference Result 137 states and 341 transitions. [2020-09-17 02:45:47,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-17 02:45:47,225 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-09-17 02:45:47,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:47,226 INFO L225 Difference]: With dead ends: 137 [2020-09-17 02:45:47,226 INFO L226 Difference]: Without dead ends: 131 [2020-09-17 02:45:47,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1499 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1732, Invalid=3818, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 02:45:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-17 02:45:47,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 108. [2020-09-17 02:45:47,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-09-17 02:45:47,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 281 transitions. [2020-09-17 02:45:47,229 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 281 transitions. Word has length 32 [2020-09-17 02:45:47,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:47,229 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 281 transitions. [2020-09-17 02:45:47,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-09-17 02:45:47,229 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 281 transitions. [2020-09-17 02:45:47,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:47,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:47,229 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:47,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 329 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable332 [2020-09-17 02:45:47,430 INFO L427 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:47,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:47,431 INFO L82 PathProgramCache]: Analyzing trace with hash 726995538, now seen corresponding path program 332 times [2020-09-17 02:45:47,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:47,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929059390] [2020-09-17 02:45:47,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:47,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:48,288 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:48,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929059390] [2020-09-17 02:45:48,288 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000927506] [2020-09-17 02:45:48,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:48,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:45:48,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:48,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:48,420 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:45:48,466 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:48,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:48,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:45:48,467 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993696704] [2020-09-17 02:45:48,467 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:45:48,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:48,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:45:48,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=622, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:45:48,468 INFO L87 Difference]: Start difference. First operand 108 states and 281 transitions. Second operand 29 states. [2020-09-17 02:45:52,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:52,561 INFO L93 Difference]: Finished difference Result 118 states and 297 transitions. [2020-09-17 02:45:52,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 02:45:52,563 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:45:52,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:52,564 INFO L225 Difference]: With dead ends: 118 [2020-09-17 02:45:52,564 INFO L226 Difference]: Without dead ends: 110 [2020-09-17 02:45:52,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1613 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1865, Invalid=4141, Unknown=0, NotChecked=0, Total=6006 [2020-09-17 02:45:52,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-17 02:45:52,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 77. [2020-09-17 02:45:52,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-17 02:45:52,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 188 transitions. [2020-09-17 02:45:52,567 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 188 transitions. Word has length 32 [2020-09-17 02:45:52,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:52,567 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 188 transitions. [2020-09-17 02:45:52,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:45:52,567 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 188 transitions. [2020-09-17 02:45:52,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-09-17 02:45:52,567 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:52,568 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:52,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 330 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable333 [2020-09-17 02:45:52,768 INFO L427 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:52,769 INFO L82 PathProgramCache]: Analyzing trace with hash -1262879060, now seen corresponding path program 333 times [2020-09-17 02:45:52,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:52,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922904726] [2020-09-17 02:45:52,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:52,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:53,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922904726] [2020-09-17 02:45:53,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733792777] [2020-09-17 02:45:53,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:53,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-09-17 02:45:53,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:53,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 28 conjunts are in the unsatisfiable core [2020-09-17 02:45:53,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:53,771 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:45:53,831 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:53,831 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:53,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-09-17 02:45:53,832 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1626504467] [2020-09-17 02:45:53,832 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:45:53,832 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:53,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:45:53,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:45:53,833 INFO L87 Difference]: Start difference. First operand 77 states and 188 transitions. Second operand 29 states. [2020-09-17 02:45:57,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:45:57,750 INFO L93 Difference]: Finished difference Result 140 states and 343 transitions. [2020-09-17 02:45:57,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-17 02:45:57,754 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-09-17 02:45:57,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:45:57,754 INFO L225 Difference]: With dead ends: 140 [2020-09-17 02:45:57,754 INFO L226 Difference]: Without dead ends: 135 [2020-09-17 02:45:57,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1731 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1930, Invalid=4076, Unknown=0, NotChecked=0, Total=6006 [2020-09-17 02:45:57,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-17 02:45:57,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 106. [2020-09-17 02:45:57,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-17 02:45:57,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-09-17 02:45:57,758 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 32 [2020-09-17 02:45:57,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:45:57,758 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-09-17 02:45:57,758 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:45:57,758 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-09-17 02:45:57,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:45:57,758 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:45:57,758 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:45:57,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2020-09-17 02:45:57,959 INFO L427 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:45:57,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:45:57,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1062041505, now seen corresponding path program 334 times [2020-09-17 02:45:57,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:45:57,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752262126] [2020-09-17 02:45:57,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:45:57,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:45:58,892 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:58,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752262126] [2020-09-17 02:45:58,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992804065] [2020-09-17 02:45:58,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:45:58,963 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:45:58,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:45:58,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:45:58,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:45:59,027 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-17 02:45:59,095 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:45:59,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:45:59,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:45:59,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666731351] [2020-09-17 02:45:59,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:45:59,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:45:59,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:45:59,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:45:59,096 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 30 states. [2020-09-17 02:46:03,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:03,273 INFO L93 Difference]: Finished difference Result 114 states and 293 transitions. [2020-09-17 02:46:03,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-17 02:46:03,276 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:46:03,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:03,276 INFO L225 Difference]: With dead ends: 114 [2020-09-17 02:46:03,276 INFO L226 Difference]: Without dead ends: 109 [2020-09-17 02:46:03,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=1951, Invalid=4211, Unknown=0, NotChecked=0, Total=6162 [2020-09-17 02:46:03,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-17 02:46:03,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 78. [2020-09-17 02:46:03,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-17 02:46:03,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 192 transitions. [2020-09-17 02:46:03,278 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 192 transitions. Word has length 33 [2020-09-17 02:46:03,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:03,278 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 192 transitions. [2020-09-17 02:46:03,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:46:03,278 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 192 transitions. [2020-09-17 02:46:03,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:03,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:03,279 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:03,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable335,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:03,479 INFO L427 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:03,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:03,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1801619636, now seen corresponding path program 335 times [2020-09-17 02:46:03,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:03,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434973852] [2020-09-17 02:46:03,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:04,686 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:04,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434973852] [2020-09-17 02:46:04,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217017378] [2020-09-17 02:46:04,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:04,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 02:46:04,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:04,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:04,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:04,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:04,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:46:04,782 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787257190] [2020-09-17 02:46:04,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:46:04,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:04,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:46:04,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=600, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:46:04,783 INFO L87 Difference]: Start difference. First operand 78 states and 192 transitions. Second operand 29 states. [2020-09-17 02:46:06,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:06,499 INFO L93 Difference]: Finished difference Result 120 states and 279 transitions. [2020-09-17 02:46:06,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-17 02:46:06,501 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:46:06,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:06,502 INFO L225 Difference]: With dead ends: 120 [2020-09-17 02:46:06,502 INFO L226 Difference]: Without dead ends: 114 [2020-09-17 02:46:06,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=913, Invalid=1949, Unknown=0, NotChecked=0, Total=2862 [2020-09-17 02:46:06,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-17 02:46:06,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 86. [2020-09-17 02:46:06,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:46:06,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 211 transitions. [2020-09-17 02:46:06,505 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 211 transitions. Word has length 33 [2020-09-17 02:46:06,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:06,505 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 211 transitions. [2020-09-17 02:46:06,505 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:46:06,505 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 211 transitions. [2020-09-17 02:46:06,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:06,505 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:06,505 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:06,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2020-09-17 02:46:06,706 INFO L427 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:06,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:06,707 INFO L82 PathProgramCache]: Analyzing trace with hash 2064174256, now seen corresponding path program 336 times [2020-09-17 02:46:06,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:06,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537488339] [2020-09-17 02:46:06,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:06,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:07,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537488339] [2020-09-17 02:46:07,876 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858343554] [2020-09-17 02:46:07,876 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:07,959 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 02:46:07,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:07,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:07,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:08,024 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:46:08,043 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:08,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:08,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:46:08,044 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093273729] [2020-09-17 02:46:08,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:46:08,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:08,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:46:08,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:46:08,045 INFO L87 Difference]: Start difference. First operand 86 states and 211 transitions. Second operand 30 states. [2020-09-17 02:46:09,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:09,928 INFO L93 Difference]: Finished difference Result 146 states and 331 transitions. [2020-09-17 02:46:09,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-17 02:46:09,930 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:46:09,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:09,931 INFO L225 Difference]: With dead ends: 146 [2020-09-17 02:46:09,931 INFO L226 Difference]: Without dead ends: 140 [2020-09-17 02:46:09,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=922, Invalid=2158, Unknown=0, NotChecked=0, Total=3080 [2020-09-17 02:46:09,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-09-17 02:46:09,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 84. [2020-09-17 02:46:09,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-17 02:46:09,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 207 transitions. [2020-09-17 02:46:09,934 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 207 transitions. Word has length 33 [2020-09-17 02:46:09,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:09,934 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 207 transitions. [2020-09-17 02:46:09,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:46:09,935 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 207 transitions. [2020-09-17 02:46:09,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:09,935 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:09,935 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:10,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable337,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:10,136 INFO L427 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:10,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:10,136 INFO L82 PathProgramCache]: Analyzing trace with hash -750635858, now seen corresponding path program 337 times [2020-09-17 02:46:10,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:10,137 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545193112] [2020-09-17 02:46:10,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:11,325 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:11,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545193112] [2020-09-17 02:46:11,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703341627] [2020-09-17 02:46:11,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:11,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:11,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:11,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:11,421 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:11,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:11,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:46:11,422 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269076429] [2020-09-17 02:46:11,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:46:11,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:11,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:46:11,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=623, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:46:11,423 INFO L87 Difference]: Start difference. First operand 84 states and 207 transitions. Second operand 29 states. [2020-09-17 02:46:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:13,486 INFO L93 Difference]: Finished difference Result 147 states and 335 transitions. [2020-09-17 02:46:13,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:46:13,489 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:46:13,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:13,490 INFO L225 Difference]: With dead ends: 147 [2020-09-17 02:46:13,490 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 02:46:13,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=922, Invalid=2270, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:46:13,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 02:46:13,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 87. [2020-09-17 02:46:13,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-17 02:46:13,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 215 transitions. [2020-09-17 02:46:13,492 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 215 transitions. Word has length 33 [2020-09-17 02:46:13,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:13,492 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 215 transitions. [2020-09-17 02:46:13,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:46:13,492 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 215 transitions. [2020-09-17 02:46:13,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:13,493 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:13,493 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:13,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable338 [2020-09-17 02:46:13,694 INFO L427 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:13,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:13,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1720423186, now seen corresponding path program 338 times [2020-09-17 02:46:13,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:13,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28923638] [2020-09-17 02:46:13,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:13,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:14,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28923638] [2020-09-17 02:46:14,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407577837] [2020-09-17 02:46:14,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:14,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:46:14,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:14,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:14,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:14,980 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:46:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:15,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:15,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:46:15,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934346373] [2020-09-17 02:46:15,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:46:15,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:15,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:46:15,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:46:15,011 INFO L87 Difference]: Start difference. First operand 87 states and 215 transitions. Second operand 30 states. [2020-09-17 02:46:17,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:17,105 INFO L93 Difference]: Finished difference Result 169 states and 379 transitions. [2020-09-17 02:46:17,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:46:17,108 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:46:17,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:17,109 INFO L225 Difference]: With dead ends: 169 [2020-09-17 02:46:17,109 INFO L226 Difference]: Without dead ends: 163 [2020-09-17 02:46:17,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=964, Invalid=2458, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:46:17,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-17 02:46:17,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 86. [2020-09-17 02:46:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-17 02:46:17,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 213 transitions. [2020-09-17 02:46:17,111 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 213 transitions. Word has length 33 [2020-09-17 02:46:17,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:17,111 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 213 transitions. [2020-09-17 02:46:17,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:46:17,111 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 213 transitions. [2020-09-17 02:46:17,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:17,112 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:17,112 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:17,312 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable339,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:17,313 INFO L427 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:17,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:17,313 INFO L82 PathProgramCache]: Analyzing trace with hash 895148688, now seen corresponding path program 339 times [2020-09-17 02:46:17,313 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:17,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295502] [2020-09-17 02:46:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:18,422 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:18,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295502] [2020-09-17 02:46:18,423 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1772730818] [2020-09-17 02:46:18,423 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:18,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 02:46:18,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:18,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:18,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:18,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:18,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:46:18,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162148389] [2020-09-17 02:46:18,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:46:18,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:18,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:46:18,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=642, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:46:18,536 INFO L87 Difference]: Start difference. First operand 86 states and 213 transitions. Second operand 29 states. [2020-09-17 02:46:20,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:20,687 INFO L93 Difference]: Finished difference Result 169 states and 381 transitions. [2020-09-17 02:46:20,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-17 02:46:20,690 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:46:20,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:20,690 INFO L225 Difference]: With dead ends: 169 [2020-09-17 02:46:20,690 INFO L226 Difference]: Without dead ends: 163 [2020-09-17 02:46:20,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=978, Invalid=2562, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:46:20,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-09-17 02:46:20,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 89. [2020-09-17 02:46:20,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-17 02:46:20,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 221 transitions. [2020-09-17 02:46:20,692 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 221 transitions. Word has length 33 [2020-09-17 02:46:20,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:20,692 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 221 transitions. [2020-09-17 02:46:20,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:46:20,692 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 221 transitions. [2020-09-17 02:46:20,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:20,693 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:20,693 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:20,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,337 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:20,894 INFO L427 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:20,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:20,894 INFO L82 PathProgramCache]: Analyzing trace with hash -143619596, now seen corresponding path program 340 times [2020-09-17 02:46:20,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:20,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952213884] [2020-09-17 02:46:20,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:22,062 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:22,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952213884] [2020-09-17 02:46:22,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859442060] [2020-09-17 02:46:22,062 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:22,138 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:46:22,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:22,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:22,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:22,206 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:46:22,233 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:22,233 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:22,233 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:46:22,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189167780] [2020-09-17 02:46:22,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:46:22,234 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:22,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:46:22,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:46:22,234 INFO L87 Difference]: Start difference. First operand 89 states and 221 transitions. Second operand 30 states. [2020-09-17 02:46:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:24,561 INFO L93 Difference]: Finished difference Result 166 states and 375 transitions. [2020-09-17 02:46:24,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:46:24,563 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:46:24,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:24,564 INFO L225 Difference]: With dead ends: 166 [2020-09-17 02:46:24,564 INFO L226 Difference]: Without dead ends: 160 [2020-09-17 02:46:24,565 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=979, Invalid=2681, Unknown=0, NotChecked=0, Total=3660 [2020-09-17 02:46:24,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-09-17 02:46:24,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 88. [2020-09-17 02:46:24,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-17 02:46:24,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 219 transitions. [2020-09-17 02:46:24,567 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 219 transitions. Word has length 33 [2020-09-17 02:46:24,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:24,567 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 219 transitions. [2020-09-17 02:46:24,567 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:46:24,567 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 219 transitions. [2020-09-17 02:46:24,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:24,567 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:24,567 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:24,768 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable341 [2020-09-17 02:46:24,768 INFO L427 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:24,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:24,769 INFO L82 PathProgramCache]: Analyzing trace with hash 271163634, now seen corresponding path program 341 times [2020-09-17 02:46:24,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:24,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087441423] [2020-09-17 02:46:24,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:24,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:25,867 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:25,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087441423] [2020-09-17 02:46:25,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919938767] [2020-09-17 02:46:25,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:25,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 02:46:25,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:25,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:25,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:25,986 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:25,986 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:25,986 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:46:25,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298778825] [2020-09-17 02:46:25,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:46:25,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:25,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:46:25,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:46:25,987 INFO L87 Difference]: Start difference. First operand 88 states and 219 transitions. Second operand 29 states. [2020-09-17 02:46:28,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:28,313 INFO L93 Difference]: Finished difference Result 167 states and 379 transitions. [2020-09-17 02:46:28,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-17 02:46:28,316 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:46:28,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:28,317 INFO L225 Difference]: With dead ends: 167 [2020-09-17 02:46:28,317 INFO L226 Difference]: Without dead ends: 161 [2020-09-17 02:46:28,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1008, Invalid=2774, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:46:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-17 02:46:28,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 91. [2020-09-17 02:46:28,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-17 02:46:28,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 227 transitions. [2020-09-17 02:46:28,319 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 227 transitions. Word has length 33 [2020-09-17 02:46:28,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:28,319 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 227 transitions. [2020-09-17 02:46:28,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:46:28,319 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 227 transitions. [2020-09-17 02:46:28,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:28,320 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:28,320 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:28,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 339 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2020-09-17 02:46:28,520 INFO L427 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:28,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:28,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1450585770, now seen corresponding path program 342 times [2020-09-17 02:46:28,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:28,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830976553] [2020-09-17 02:46:28,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:29,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830976553] [2020-09-17 02:46:29,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061645210] [2020-09-17 02:46:29,631 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:29,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 02:46:29,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:29,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:29,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:29,783 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:46:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:29,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:29,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:46:29,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104406769] [2020-09-17 02:46:29,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:46:29,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:29,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:46:29,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:46:29,815 INFO L87 Difference]: Start difference. First operand 91 states and 227 transitions. Second operand 30 states. [2020-09-17 02:46:32,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:32,405 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2020-09-17 02:46:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-17 02:46:32,408 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:46:32,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:32,408 INFO L225 Difference]: With dead ends: 164 [2020-09-17 02:46:32,409 INFO L226 Difference]: Without dead ends: 158 [2020-09-17 02:46:32,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 851 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1010, Invalid=2896, Unknown=0, NotChecked=0, Total=3906 [2020-09-17 02:46:32,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-09-17 02:46:32,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 90. [2020-09-17 02:46:32,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-17 02:46:32,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 225 transitions. [2020-09-17 02:46:32,411 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 225 transitions. Word has length 33 [2020-09-17 02:46:32,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:32,411 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 225 transitions. [2020-09-17 02:46:32,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:46:32,411 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 225 transitions. [2020-09-17 02:46:32,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:32,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:32,412 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:32,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 340 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable343 [2020-09-17 02:46:32,613 INFO L427 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:32,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:32,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1660456916, now seen corresponding path program 343 times [2020-09-17 02:46:32,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:32,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797586881] [2020-09-17 02:46:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:33,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797586881] [2020-09-17 02:46:33,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043498362] [2020-09-17 02:46:33,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:33,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:33,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:33,784 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:33,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:33,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:46:33,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464565487] [2020-09-17 02:46:33,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:46:33,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:33,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:46:33,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:46:33,785 INFO L87 Difference]: Start difference. First operand 90 states and 225 transitions. Second operand 29 states. [2020-09-17 02:46:36,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:36,271 INFO L93 Difference]: Finished difference Result 165 states and 377 transitions. [2020-09-17 02:46:36,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-17 02:46:36,273 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:46:36,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:36,274 INFO L225 Difference]: With dead ends: 165 [2020-09-17 02:46:36,274 INFO L226 Difference]: Without dead ends: 159 [2020-09-17 02:46:36,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=1054, Invalid=2978, Unknown=0, NotChecked=0, Total=4032 [2020-09-17 02:46:36,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-09-17 02:46:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 93. [2020-09-17 02:46:36,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-17 02:46:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-09-17 02:46:36,277 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 33 [2020-09-17 02:46:36,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:36,277 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-09-17 02:46:36,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:46:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-09-17 02:46:36,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:36,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:36,278 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:36,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2020-09-17 02:46:36,479 INFO L427 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:36,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:36,479 INFO L82 PathProgramCache]: Analyzing trace with hash 112298296, now seen corresponding path program 344 times [2020-09-17 02:46:36,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:36,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420267783] [2020-09-17 02:46:36,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:36,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:37,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420267783] [2020-09-17 02:46:37,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121348299] [2020-09-17 02:46:37,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:37,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:46:37,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:37,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:37,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:37,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:46:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:37,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:37,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:46:37,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623123687] [2020-09-17 02:46:37,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:46:37,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:37,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:46:37,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:46:37,747 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 30 states. [2020-09-17 02:46:40,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:40,618 INFO L93 Difference]: Finished difference Result 162 states and 371 transitions. [2020-09-17 02:46:40,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-17 02:46:40,621 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:46:40,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:40,621 INFO L225 Difference]: With dead ends: 162 [2020-09-17 02:46:40,622 INFO L226 Difference]: Without dead ends: 156 [2020-09-17 02:46:40,622 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1057, Invalid=3103, Unknown=0, NotChecked=0, Total=4160 [2020-09-17 02:46:40,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-09-17 02:46:40,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 92. [2020-09-17 02:46:40,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-17 02:46:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 231 transitions. [2020-09-17 02:46:40,624 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 231 transitions. Word has length 33 [2020-09-17 02:46:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:40,624 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 231 transitions. [2020-09-17 02:46:40,624 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:46:40,625 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 231 transitions. [2020-09-17 02:46:40,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:40,625 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:40,625 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:40,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 342 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable345 [2020-09-17 02:46:40,826 INFO L427 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:40,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:40,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1189490890, now seen corresponding path program 345 times [2020-09-17 02:46:40,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:40,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14187518] [2020-09-17 02:46:40,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:40,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:41,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14187518] [2020-09-17 02:46:41,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1521636919] [2020-09-17 02:46:41,851 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:41,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 02:46:41,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:41,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:41,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:41,972 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:41,973 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:41,973 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:46:41,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787132191] [2020-09-17 02:46:41,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:46:41,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:41,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:46:41,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:46:41,973 INFO L87 Difference]: Start difference. First operand 92 states and 231 transitions. Second operand 29 states. [2020-09-17 02:46:44,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:44,702 INFO L93 Difference]: Finished difference Result 163 states and 375 transitions. [2020-09-17 02:46:44,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-17 02:46:44,705 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:46:44,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:44,706 INFO L225 Difference]: With dead ends: 163 [2020-09-17 02:46:44,706 INFO L226 Difference]: Without dead ends: 157 [2020-09-17 02:46:44,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1025 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1116, Invalid=3174, Unknown=0, NotChecked=0, Total=4290 [2020-09-17 02:46:44,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-09-17 02:46:44,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 95. [2020-09-17 02:46:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-09-17 02:46:44,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 239 transitions. [2020-09-17 02:46:44,709 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 239 transitions. Word has length 33 [2020-09-17 02:46:44,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:44,709 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 239 transitions. [2020-09-17 02:46:44,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:46:44,709 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 239 transitions. [2020-09-17 02:46:44,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:44,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:44,710 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:44,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable346 [2020-09-17 02:46:44,910 INFO L427 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:44,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:44,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2000039526, now seen corresponding path program 346 times [2020-09-17 02:46:44,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:44,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428983947] [2020-09-17 02:46:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:45,955 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:45,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428983947] [2020-09-17 02:46:45,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162424722] [2020-09-17 02:46:45,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:46,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:46:46,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:46,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:46,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:46,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:46:46,133 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:46,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:46,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:46:46,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169193607] [2020-09-17 02:46:46,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:46:46,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:46,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:46:46,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:46:46,134 INFO L87 Difference]: Start difference. First operand 95 states and 239 transitions. Second operand 30 states. [2020-09-17 02:46:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:49,213 INFO L93 Difference]: Finished difference Result 160 states and 369 transitions. [2020-09-17 02:46:49,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-17 02:46:49,216 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:46:49,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:49,216 INFO L225 Difference]: With dead ends: 160 [2020-09-17 02:46:49,216 INFO L226 Difference]: Without dead ends: 154 [2020-09-17 02:46:49,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1120, Invalid=3302, Unknown=0, NotChecked=0, Total=4422 [2020-09-17 02:46:49,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-09-17 02:46:49,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 94. [2020-09-17 02:46:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-17 02:46:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 237 transitions. [2020-09-17 02:46:49,219 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 237 transitions. Word has length 33 [2020-09-17 02:46:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:49,219 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 237 transitions. [2020-09-17 02:46:49,219 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:46:49,219 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 237 transitions. [2020-09-17 02:46:49,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:49,219 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:49,219 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:49,420 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable347,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:49,420 INFO L427 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:49,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:49,421 INFO L82 PathProgramCache]: Analyzing trace with hash -1947762920, now seen corresponding path program 347 times [2020-09-17 02:46:49,421 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:49,421 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460994036] [2020-09-17 02:46:49,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:49,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:50,529 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:50,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460994036] [2020-09-17 02:46:50,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9893812] [2020-09-17 02:46:50,529 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:50,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 02:46:50,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:50,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:50,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:50,650 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:50,650 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:50,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:46:50,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530880551] [2020-09-17 02:46:50,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:46:50,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:50,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:46:50,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:46:50,651 INFO L87 Difference]: Start difference. First operand 94 states and 237 transitions. Second operand 29 states. [2020-09-17 02:46:53,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:53,554 INFO L93 Difference]: Finished difference Result 161 states and 373 transitions. [2020-09-17 02:46:53,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-17 02:46:53,557 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:46:53,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:53,557 INFO L225 Difference]: With dead ends: 161 [2020-09-17 02:46:53,558 INFO L226 Difference]: Without dead ends: 155 [2020-09-17 02:46:53,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1131 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1194, Invalid=3362, Unknown=0, NotChecked=0, Total=4556 [2020-09-17 02:46:53,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-09-17 02:46:53,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 97. [2020-09-17 02:46:53,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-17 02:46:53,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 245 transitions. [2020-09-17 02:46:53,561 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 245 transitions. Word has length 33 [2020-09-17 02:46:53,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:53,561 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 245 transitions. [2020-09-17 02:46:53,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:46:53,561 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 245 transitions. [2020-09-17 02:46:53,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:53,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:53,562 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:53,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2020-09-17 02:46:53,770 INFO L427 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:53,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:53,771 INFO L82 PathProgramCache]: Analyzing trace with hash -71513476, now seen corresponding path program 348 times [2020-09-17 02:46:53,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:53,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957032246] [2020-09-17 02:46:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:53,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:54,794 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:54,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957032246] [2020-09-17 02:46:54,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198355449] [2020-09-17 02:46:54,795 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:54,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 02:46:54,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:46:54,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:54,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:54,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:46:54,982 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:54,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:54,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:46:54,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968984371] [2020-09-17 02:46:54,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:46:54,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:54,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:46:54,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:46:54,983 INFO L87 Difference]: Start difference. First operand 97 states and 245 transitions. Second operand 30 states. [2020-09-17 02:46:58,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:46:58,370 INFO L93 Difference]: Finished difference Result 158 states and 367 transitions. [2020-09-17 02:46:58,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-17 02:46:58,373 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:46:58,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:46:58,374 INFO L225 Difference]: With dead ends: 158 [2020-09-17 02:46:58,374 INFO L226 Difference]: Without dead ends: 152 [2020-09-17 02:46:58,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1199, Invalid=3493, Unknown=0, NotChecked=0, Total=4692 [2020-09-17 02:46:58,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-09-17 02:46:58,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 96. [2020-09-17 02:46:58,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-17 02:46:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 243 transitions. [2020-09-17 02:46:58,377 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 243 transitions. Word has length 33 [2020-09-17 02:46:58,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:46:58,377 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 243 transitions. [2020-09-17 02:46:58,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:46:58,377 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 243 transitions. [2020-09-17 02:46:58,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:46:58,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:46:58,379 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:46:58,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 346 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable349 [2020-09-17 02:46:58,594 INFO L427 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:46:58,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:46:58,595 INFO L82 PathProgramCache]: Analyzing trace with hash 616808314, now seen corresponding path program 349 times [2020-09-17 02:46:58,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:46:58,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610417143] [2020-09-17 02:46:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:46:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:59,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610417143] [2020-09-17 02:46:59,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864875711] [2020-09-17 02:46:59,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:46:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:46:59,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:46:59,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:46:59,719 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:46:59,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:46:59,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:46:59,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552310766] [2020-09-17 02:46:59,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:46:59,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:46:59,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:46:59,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=677, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:46:59,720 INFO L87 Difference]: Start difference. First operand 96 states and 243 transitions. Second operand 29 states. [2020-09-17 02:47:02,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:02,819 INFO L93 Difference]: Finished difference Result 159 states and 371 transitions. [2020-09-17 02:47:02,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-09-17 02:47:02,822 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:47:02,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:02,823 INFO L225 Difference]: With dead ends: 159 [2020-09-17 02:47:02,823 INFO L226 Difference]: Without dead ends: 153 [2020-09-17 02:47:02,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1241 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1288, Invalid=3542, Unknown=0, NotChecked=0, Total=4830 [2020-09-17 02:47:02,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-09-17 02:47:02,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 99. [2020-09-17 02:47:02,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-09-17 02:47:02,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 251 transitions. [2020-09-17 02:47:02,826 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 251 transitions. Word has length 33 [2020-09-17 02:47:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:02,826 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 251 transitions. [2020-09-17 02:47:02,826 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:47:02,826 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 251 transitions. [2020-09-17 02:47:02,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:02,826 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:02,826 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:03,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,347 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:03,027 INFO L427 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:03,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:03,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1601999838, now seen corresponding path program 350 times [2020-09-17 02:47:03,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:03,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585891564] [2020-09-17 02:47:03,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:03,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:04,033 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:04,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585891564] [2020-09-17 02:47:04,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581434463] [2020-09-17 02:47:04,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:04,108 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:47:04,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:04,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:04,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:04,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:47:04,217 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:04,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:04,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:47:04,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508109296] [2020-09-17 02:47:04,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:47:04,218 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:04,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:47:04,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=736, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:47:04,218 INFO L87 Difference]: Start difference. First operand 99 states and 251 transitions. Second operand 30 states. [2020-09-17 02:47:07,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:07,805 INFO L93 Difference]: Finished difference Result 156 states and 365 transitions. [2020-09-17 02:47:07,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-17 02:47:07,808 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:47:07,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:07,808 INFO L225 Difference]: With dead ends: 156 [2020-09-17 02:47:07,809 INFO L226 Difference]: Without dead ends: 150 [2020-09-17 02:47:07,809 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1254 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1294, Invalid=3676, Unknown=0, NotChecked=0, Total=4970 [2020-09-17 02:47:07,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-09-17 02:47:07,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 98. [2020-09-17 02:47:07,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-09-17 02:47:07,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 249 transitions. [2020-09-17 02:47:07,811 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 249 transitions. Word has length 33 [2020-09-17 02:47:07,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:07,811 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 249 transitions. [2020-09-17 02:47:07,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:47:07,811 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 249 transitions. [2020-09-17 02:47:07,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:07,812 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:07,812 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:08,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable351,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:08,013 INFO L427 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:08,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:08,013 INFO L82 PathProgramCache]: Analyzing trace with hash -15159204, now seen corresponding path program 351 times [2020-09-17 02:47:08,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:08,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138247567] [2020-09-17 02:47:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:09,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138247567] [2020-09-17 02:47:09,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984192310] [2020-09-17 02:47:09,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:09,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 02:47:09,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:09,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:09,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:09,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:09,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:47:09,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209333216] [2020-09-17 02:47:09,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:47:09,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:09,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:47:09,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:47:09,217 INFO L87 Difference]: Start difference. First operand 98 states and 249 transitions. Second operand 29 states. [2020-09-17 02:47:12,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:12,515 INFO L93 Difference]: Finished difference Result 157 states and 369 transitions. [2020-09-17 02:47:12,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-17 02:47:12,518 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:47:12,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:12,519 INFO L225 Difference]: With dead ends: 157 [2020-09-17 02:47:12,519 INFO L226 Difference]: Without dead ends: 151 [2020-09-17 02:47:12,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1398, Invalid=3714, Unknown=0, NotChecked=0, Total=5112 [2020-09-17 02:47:12,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-09-17 02:47:12,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 101. [2020-09-17 02:47:12,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-09-17 02:47:12,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-09-17 02:47:12,522 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 33 [2020-09-17 02:47:12,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:12,522 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-09-17 02:47:12,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:47:12,522 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-09-17 02:47:12,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:12,522 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:12,522 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:12,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable352,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:12,723 INFO L427 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:12,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:12,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1241730496, now seen corresponding path program 352 times [2020-09-17 02:47:12,724 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:12,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557587871] [2020-09-17 02:47:12,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:12,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:13,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557587871] [2020-09-17 02:47:13,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530323762] [2020-09-17 02:47:13,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:13,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:47:13,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:13,805 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:13,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:13,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:47:13,916 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:13,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:13,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:47:13,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800608834] [2020-09-17 02:47:13,917 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:47:13,917 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:13,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:47:13,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:47:13,918 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 30 states. [2020-09-17 02:47:17,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:17,802 INFO L93 Difference]: Finished difference Result 154 states and 363 transitions. [2020-09-17 02:47:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-09-17 02:47:17,805 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:47:17,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:17,806 INFO L225 Difference]: With dead ends: 154 [2020-09-17 02:47:17,806 INFO L226 Difference]: Without dead ends: 148 [2020-09-17 02:47:17,806 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=1405, Invalid=3851, Unknown=0, NotChecked=0, Total=5256 [2020-09-17 02:47:17,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-09-17 02:47:17,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 100. [2020-09-17 02:47:17,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-17 02:47:17,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 255 transitions. [2020-09-17 02:47:17,808 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 255 transitions. Word has length 33 [2020-09-17 02:47:17,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:17,808 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 255 transitions. [2020-09-17 02:47:17,808 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:47:17,814 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 255 transitions. [2020-09-17 02:47:17,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:17,814 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:17,814 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:18,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable353 [2020-09-17 02:47:18,015 INFO L427 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:18,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:18,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1437044290, now seen corresponding path program 353 times [2020-09-17 02:47:18,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:18,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722616439] [2020-09-17 02:47:18,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:18,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:19,040 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:19,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722616439] [2020-09-17 02:47:19,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310633628] [2020-09-17 02:47:19,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:19,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 02:47:19,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:19,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:19,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:19,189 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:19,190 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:47:19,190 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723310063] [2020-09-17 02:47:19,190 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:47:19,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:19,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:47:19,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=663, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:47:19,190 INFO L87 Difference]: Start difference. First operand 100 states and 255 transitions. Second operand 29 states. [2020-09-17 02:47:22,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:22,693 INFO L93 Difference]: Finished difference Result 155 states and 367 transitions. [2020-09-17 02:47:22,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-09-17 02:47:22,696 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:47:22,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:22,696 INFO L225 Difference]: With dead ends: 155 [2020-09-17 02:47:22,696 INFO L226 Difference]: Without dead ends: 149 [2020-09-17 02:47:22,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1524, Invalid=3878, Unknown=0, NotChecked=0, Total=5402 [2020-09-17 02:47:22,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-09-17 02:47:22,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 103. [2020-09-17 02:47:22,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-09-17 02:47:22,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 263 transitions. [2020-09-17 02:47:22,699 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 263 transitions. Word has length 33 [2020-09-17 02:47:22,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:22,700 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 263 transitions. [2020-09-17 02:47:22,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:47:22,700 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 263 transitions. [2020-09-17 02:47:22,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:22,700 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:22,700 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:22,900 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2020-09-17 02:47:22,901 INFO L427 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:22,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:22,901 INFO L82 PathProgramCache]: Analyzing trace with hash -917301214, now seen corresponding path program 354 times [2020-09-17 02:47:22,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:22,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755206335] [2020-09-17 02:47:22,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:23,924 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:23,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755206335] [2020-09-17 02:47:23,924 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923267378] [2020-09-17 02:47:23,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:24,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 02:47:24,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:24,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:24,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:24,080 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:47:24,123 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:24,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:24,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:47:24,124 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303920191] [2020-09-17 02:47:24,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:47:24,124 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:24,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:47:24,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:47:24,125 INFO L87 Difference]: Start difference. First operand 103 states and 263 transitions. Second operand 30 states. [2020-09-17 02:47:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:28,355 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-09-17 02:47:28,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-09-17 02:47:28,358 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:47:28,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:28,358 INFO L225 Difference]: With dead ends: 152 [2020-09-17 02:47:28,358 INFO L226 Difference]: Without dead ends: 146 [2020-09-17 02:47:28,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1532, Invalid=4018, Unknown=0, NotChecked=0, Total=5550 [2020-09-17 02:47:28,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-09-17 02:47:28,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 102. [2020-09-17 02:47:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-09-17 02:47:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-09-17 02:47:28,361 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 33 [2020-09-17 02:47:28,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:28,361 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-09-17 02:47:28,361 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:47:28,361 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-09-17 02:47:28,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:28,361 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:28,362 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:28,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable355,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:28,562 INFO L427 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:28,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:28,563 INFO L82 PathProgramCache]: Analyzing trace with hash 738010016, now seen corresponding path program 355 times [2020-09-17 02:47:28,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:28,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794428668] [2020-09-17 02:47:28,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:29,571 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:29,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794428668] [2020-09-17 02:47:29,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50431600] [2020-09-17 02:47:29,572 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:29,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:29,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:29,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:29,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:29,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:47:29,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580902882] [2020-09-17 02:47:29,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:47:29,709 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:29,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:47:29,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:47:29,710 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 29 states. [2020-09-17 02:47:33,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:33,446 INFO L93 Difference]: Finished difference Result 153 states and 365 transitions. [2020-09-17 02:47:33,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-09-17 02:47:33,449 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:47:33,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:33,450 INFO L225 Difference]: With dead ends: 153 [2020-09-17 02:47:33,450 INFO L226 Difference]: Without dead ends: 147 [2020-09-17 02:47:33,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1666, Invalid=4034, Unknown=0, NotChecked=0, Total=5700 [2020-09-17 02:47:33,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-09-17 02:47:33,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 105. [2020-09-17 02:47:33,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-09-17 02:47:33,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 269 transitions. [2020-09-17 02:47:33,454 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 269 transitions. Word has length 33 [2020-09-17 02:47:33,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:33,454 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 269 transitions. [2020-09-17 02:47:33,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:47:33,454 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 269 transitions. [2020-09-17 02:47:33,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:33,454 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:33,454 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:33,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 353 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2020-09-17 02:47:33,655 INFO L427 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:33,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:33,656 INFO L82 PathProgramCache]: Analyzing trace with hash -982117628, now seen corresponding path program 356 times [2020-09-17 02:47:33,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:33,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110484278] [2020-09-17 02:47:33,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:34,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110484278] [2020-09-17 02:47:34,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287821940] [2020-09-17 02:47:34,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:34,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:47:34,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:34,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:34,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:34,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:47:34,877 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:34,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:34,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:47:34,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419405571] [2020-09-17 02:47:34,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:47:34,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:34,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:47:34,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:47:34,878 INFO L87 Difference]: Start difference. First operand 105 states and 269 transitions. Second operand 30 states. [2020-09-17 02:47:39,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:39,311 INFO L93 Difference]: Finished difference Result 150 states and 359 transitions. [2020-09-17 02:47:39,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-17 02:47:39,314 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:47:39,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:39,314 INFO L225 Difference]: With dead ends: 150 [2020-09-17 02:47:39,314 INFO L226 Difference]: Without dead ends: 144 [2020-09-17 02:47:39,315 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1599 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1675, Invalid=4177, Unknown=0, NotChecked=0, Total=5852 [2020-09-17 02:47:39,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-09-17 02:47:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 104. [2020-09-17 02:47:39,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-17 02:47:39,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 267 transitions. [2020-09-17 02:47:39,318 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 267 transitions. Word has length 33 [2020-09-17 02:47:39,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:39,318 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 267 transitions. [2020-09-17 02:47:39,318 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:47:39,318 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 267 transitions. [2020-09-17 02:47:39,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:39,318 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:39,318 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:39,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable357,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:39,519 INFO L427 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:39,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:39,520 INFO L82 PathProgramCache]: Analyzing trace with hash -511121918, now seen corresponding path program 357 times [2020-09-17 02:47:39,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:39,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659763717] [2020-09-17 02:47:39,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:39,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:40,574 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:40,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659763717] [2020-09-17 02:47:40,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943582091] [2020-09-17 02:47:40,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:40,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 02:47:40,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:40,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:40,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:40,724 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:40,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:47:40,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723994651] [2020-09-17 02:47:40,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:47:40,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:40,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:47:40,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:47:40,725 INFO L87 Difference]: Start difference. First operand 104 states and 267 transitions. Second operand 29 states. [2020-09-17 02:47:44,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:44,779 INFO L93 Difference]: Finished difference Result 151 states and 363 transitions. [2020-09-17 02:47:44,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-17 02:47:44,782 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:47:44,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:44,782 INFO L225 Difference]: With dead ends: 151 [2020-09-17 02:47:44,782 INFO L226 Difference]: Without dead ends: 145 [2020-09-17 02:47:44,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1721 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1824, Invalid=4182, Unknown=0, NotChecked=0, Total=6006 [2020-09-17 02:47:44,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-09-17 02:47:44,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 107. [2020-09-17 02:47:44,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-09-17 02:47:44,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 275 transitions. [2020-09-17 02:47:44,785 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 275 transitions. Word has length 33 [2020-09-17 02:47:44,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:44,785 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 275 transitions. [2020-09-17 02:47:44,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:47:44,785 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 275 transitions. [2020-09-17 02:47:44,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:44,785 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:44,785 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:44,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2020-09-17 02:47:44,986 INFO L427 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:44,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:44,987 INFO L82 PathProgramCache]: Analyzing trace with hash -495034778, now seen corresponding path program 358 times [2020-09-17 02:47:44,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:44,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435151682] [2020-09-17 02:47:44,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:45,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:45,998 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:45,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435151682] [2020-09-17 02:47:45,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909993666] [2020-09-17 02:47:45,999 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:46,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:47:46,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:46,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:46,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:46,141 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:47:46,196 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:46,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:46,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:47:46,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728797] [2020-09-17 02:47:46,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:47:46,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:46,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:47:46,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:47:46,198 INFO L87 Difference]: Start difference. First operand 107 states and 275 transitions. Second operand 30 states. [2020-09-17 02:47:50,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:50,905 INFO L93 Difference]: Finished difference Result 148 states and 357 transitions. [2020-09-17 02:47:50,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-09-17 02:47:50,908 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:47:50,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:50,909 INFO L225 Difference]: With dead ends: 148 [2020-09-17 02:47:50,909 INFO L226 Difference]: Without dead ends: 142 [2020-09-17 02:47:50,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1722 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1834, Invalid=4328, Unknown=0, NotChecked=0, Total=6162 [2020-09-17 02:47:50,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-09-17 02:47:50,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 106. [2020-09-17 02:47:50,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-09-17 02:47:50,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 273 transitions. [2020-09-17 02:47:50,912 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 273 transitions. Word has length 33 [2020-09-17 02:47:50,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:50,912 INFO L479 AbstractCegarLoop]: Abstraction has 106 states and 273 transitions. [2020-09-17 02:47:50,912 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:47:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 273 transitions. [2020-09-17 02:47:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:50,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:50,913 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:51,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable359,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:51,114 INFO L427 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:51,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:51,114 INFO L82 PathProgramCache]: Analyzing trace with hash -494544668, now seen corresponding path program 359 times [2020-09-17 02:47:51,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:51,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810387073] [2020-09-17 02:47:51,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:51,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:52,144 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:52,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810387073] [2020-09-17 02:47:52,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052821698] [2020-09-17 02:47:52,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:52,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 02:47:52,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:52,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:52,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:52,296 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:52,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:52,297 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2020-09-17 02:47:52,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655672091] [2020-09-17 02:47:52,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-17 02:47:52,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:52,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-17 02:47:52,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-09-17 02:47:52,297 INFO L87 Difference]: Start difference. First operand 106 states and 273 transitions. Second operand 29 states. [2020-09-17 02:47:56,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:47:56,528 INFO L93 Difference]: Finished difference Result 168 states and 407 transitions. [2020-09-17 02:47:56,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-09-17 02:47:56,532 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-09-17 02:47:56,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:47:56,532 INFO L225 Difference]: With dead ends: 168 [2020-09-17 02:47:56,533 INFO L226 Difference]: Without dead ends: 162 [2020-09-17 02:47:56,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1851 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=1998, Invalid=4322, Unknown=0, NotChecked=0, Total=6320 [2020-09-17 02:47:56,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-17 02:47:56,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 112. [2020-09-17 02:47:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-09-17 02:47:56,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 293 transitions. [2020-09-17 02:47:56,536 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 293 transitions. Word has length 33 [2020-09-17 02:47:56,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:47:56,536 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 293 transitions. [2020-09-17 02:47:56,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-17 02:47:56,536 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 293 transitions. [2020-09-17 02:47:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-17 02:47:56,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:47:56,537 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:47:56,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,357 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:56,738 INFO L427 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:47:56,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:47:56,738 INFO L82 PathProgramCache]: Analyzing trace with hash -494527928, now seen corresponding path program 360 times [2020-09-17 02:47:56,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:47:56,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73305263] [2020-09-17 02:47:56,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:47:56,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:47:57,798 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:57,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73305263] [2020-09-17 02:47:57,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651017057] [2020-09-17 02:47:57,799 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:47:57,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-09-17 02:47:57,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:47:57,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 29 conjunts are in the unsatisfiable core [2020-09-17 02:47:57,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:47:57,961 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:47:58,016 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:47:58,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:47:58,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-09-17 02:47:58,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153390035] [2020-09-17 02:47:58,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:47:58,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:47:58,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:47:58,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:47:58,017 INFO L87 Difference]: Start difference. First operand 112 states and 293 transitions. Second operand 30 states. [2020-09-17 02:48:02,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:48:02,741 INFO L93 Difference]: Finished difference Result 149 states and 363 transitions. [2020-09-17 02:48:02,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-09-17 02:48:02,744 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-09-17 02:48:02,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:48:02,744 INFO L225 Difference]: With dead ends: 149 [2020-09-17 02:48:02,744 INFO L226 Difference]: Without dead ends: 141 [2020-09-17 02:48:02,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1850 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2009, Invalid=4471, Unknown=0, NotChecked=0, Total=6480 [2020-09-17 02:48:02,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-09-17 02:48:02,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 109. [2020-09-17 02:48:02,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-09-17 02:48:02,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-09-17 02:48:02,747 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-09-17 02:48:02,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:48:02,748 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-09-17 02:48:02,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:48:02,748 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-09-17 02:48:02,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 02:48:02,748 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:48:02,748 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:48:02,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable361,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:02,949 INFO L427 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:48:02,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:48:02,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1551441143, now seen corresponding path program 361 times [2020-09-17 02:48:02,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:48:02,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339593029] [2020-09-17 02:48:02,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:48:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:48:04,357 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:04,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339593029] [2020-09-17 02:48:04,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256472889] [2020-09-17 02:48:04,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:48:04,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 02:48:04,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:48:04,458 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:04,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:48:04,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 02:48:04,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041326655] [2020-09-17 02:48:04,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:48:04,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:48:04,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:48:04,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=656, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:48:04,460 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 30 states. [2020-09-17 02:48:06,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:48:06,795 INFO L93 Difference]: Finished difference Result 174 states and 411 transitions. [2020-09-17 02:48:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-17 02:48:06,798 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-09-17 02:48:06,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:48:06,799 INFO L225 Difference]: With dead ends: 174 [2020-09-17 02:48:06,799 INFO L226 Difference]: Without dead ends: 168 [2020-09-17 02:48:06,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=975, Invalid=2217, Unknown=0, NotChecked=0, Total=3192 [2020-09-17 02:48:06,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-09-17 02:48:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 111. [2020-09-17 02:48:06,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-17 02:48:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-09-17 02:48:06,802 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-09-17 02:48:06,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:48:06,803 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-09-17 02:48:06,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:48:06,803 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-09-17 02:48:06,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 02:48:06,803 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:48:06,803 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:48:07,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable362 [2020-09-17 02:48:07,004 INFO L427 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:48:07,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:48:07,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1122267739, now seen corresponding path program 362 times [2020-09-17 02:48:07,005 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:48:07,005 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843763296] [2020-09-17 02:48:07,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:48:07,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:48:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:08,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843763296] [2020-09-17 02:48:08,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422069559] [2020-09-17 02:48:08,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:08,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-17 02:48:08,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:48:08,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 02:48:08,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:48:08,574 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:48:08,605 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:08,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:48:08,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-09-17 02:48:08,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995840596] [2020-09-17 02:48:08,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 02:48:08,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:48:08,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 02:48:08,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=724, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:48:08,606 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-09-17 02:48:11,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:48:11,022 INFO L93 Difference]: Finished difference Result 171 states and 405 transitions. [2020-09-17 02:48:11,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-17 02:48:11,025 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 02:48:11,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:48:11,026 INFO L225 Difference]: With dead ends: 171 [2020-09-17 02:48:11,026 INFO L226 Difference]: Without dead ends: 165 [2020-09-17 02:48:11,027 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1034, Invalid=2506, Unknown=0, NotChecked=0, Total=3540 [2020-09-17 02:48:11,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-09-17 02:48:11,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 110. [2020-09-17 02:48:11,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-17 02:48:11,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-09-17 02:48:11,029 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-09-17 02:48:11,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:48:11,029 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-09-17 02:48:11,029 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 02:48:11,029 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-09-17 02:48:11,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 02:48:11,030 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:48:11,030 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:48:11,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable363,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:11,231 INFO L427 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:48:11,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:48:11,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1692542375, now seen corresponding path program 363 times [2020-09-17 02:48:11,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:48:11,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004610534] [2020-09-17 02:48:11,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:48:11,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:48:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:12,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004610534] [2020-09-17 02:48:12,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635419801] [2020-09-17 02:48:12,582 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:12,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2020-09-17 02:48:12,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:48:12,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 02:48:12,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:48:12,693 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:12,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:48:12,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 02:48:12,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072248819] [2020-09-17 02:48:12,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:48:12,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:48:12,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:48:12,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=678, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:48:12,694 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states. [2020-09-17 02:48:15,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:48:15,131 INFO L93 Difference]: Finished difference Result 168 states and 399 transitions. [2020-09-17 02:48:15,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-17 02:48:15,134 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-09-17 02:48:15,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:48:15,134 INFO L225 Difference]: With dead ends: 168 [2020-09-17 02:48:15,134 INFO L226 Difference]: Without dead ends: 162 [2020-09-17 02:48:15,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 634 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-09-17 02:48:15,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-09-17 02:48:15,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 111. [2020-09-17 02:48:15,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-09-17 02:48:15,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 285 transitions. [2020-09-17 02:48:15,137 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 285 transitions. Word has length 34 [2020-09-17 02:48:15,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:48:15,137 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 285 transitions. [2020-09-17 02:48:15,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-09-17 02:48:15,138 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 285 transitions. [2020-09-17 02:48:15,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 02:48:15,138 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:48:15,138 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:48:15,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable364 [2020-09-17 02:48:15,339 INFO L427 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:48:15,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:48:15,339 INFO L82 PathProgramCache]: Analyzing trace with hash 778516669, now seen corresponding path program 364 times [2020-09-17 02:48:15,340 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:48:15,340 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780720972] [2020-09-17 02:48:15,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:48:15,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:48:16,778 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:16,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780720972] [2020-09-17 02:48:16,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649045108] [2020-09-17 02:48:16,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:16,850 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-17 02:48:16,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:48:16,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 02:48:16,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:48:16,934 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-17 02:48:16,966 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:16,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:48:16,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-09-17 02:48:16,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855868989] [2020-09-17 02:48:16,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-17 02:48:16,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:48:16,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-17 02:48:16,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=745, Unknown=0, NotChecked=0, Total=930 [2020-09-17 02:48:16,967 INFO L87 Difference]: Start difference. First operand 111 states and 285 transitions. Second operand 31 states. [2020-09-17 02:48:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-17 02:48:19,780 INFO L93 Difference]: Finished difference Result 167 states and 397 transitions. [2020-09-17 02:48:19,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-17 02:48:19,783 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-09-17 02:48:19,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-17 02:48:19,783 INFO L225 Difference]: With dead ends: 167 [2020-09-17 02:48:19,784 INFO L226 Difference]: Without dead ends: 161 [2020-09-17 02:48:19,784 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=1040, Invalid=2742, Unknown=0, NotChecked=0, Total=3782 [2020-09-17 02:48:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-09-17 02:48:19,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 110. [2020-09-17 02:48:19,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-09-17 02:48:19,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 283 transitions. [2020-09-17 02:48:19,786 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 283 transitions. Word has length 34 [2020-09-17 02:48:19,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-17 02:48:19,786 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 283 transitions. [2020-09-17 02:48:19,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-17 02:48:19,787 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 283 transitions. [2020-09-17 02:48:19,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-09-17 02:48:19,787 INFO L414 BasicCegarLoop]: Found error trace [2020-09-17 02:48:19,787 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-17 02:48:19,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable365,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:19,988 INFO L427 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-17 02:48:19,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-17 02:48:19,988 INFO L82 PathProgramCache]: Analyzing trace with hash -46757829, now seen corresponding path program 365 times [2020-09-17 02:48:19,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-17 02:48:19,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097507686] [2020-09-17 02:48:19,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-17 02:48:20,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-17 02:48:21,307 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:21,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097507686] [2020-09-17 02:48:21,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676932817] [2020-09-17 02:48:21,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-17 02:48:21,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-09-17 02:48:21,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-17 02:48:21,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 30 conjunts are in the unsatisfiable core [2020-09-17 02:48:21,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-17 02:48:21,425 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-17 02:48:21,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-17 02:48:21,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-09-17 02:48:21,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965646062] [2020-09-17 02:48:21,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-09-17 02:48:21,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-17 02:48:21,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-09-17 02:48:21,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=696, Unknown=0, NotChecked=0, Total=870 [2020-09-17 02:48:21,427 INFO L87 Difference]: Start difference. First operand 110 states and 283 transitions. Second operand 30 states.