/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-SP.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longest-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7a177ad [2020-11-09 16:20:39,739 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-09 16:20:39,742 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-09 16:20:39,800 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-09 16:20:39,801 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-09 16:20:39,806 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-09 16:20:39,811 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-09 16:20:39,819 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-09 16:20:39,822 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-09 16:20:39,834 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-09 16:20:39,837 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-09 16:20:39,838 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-09 16:20:39,839 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-09 16:20:39,846 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-09 16:20:39,849 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-09 16:20:39,852 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-09 16:20:39,854 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-09 16:20:39,857 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-09 16:20:39,865 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-09 16:20:39,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-09 16:20:39,873 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-09 16:20:39,876 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-09 16:20:39,878 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-09 16:20:39,881 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-09 16:20:39,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-09 16:20:39,893 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-09 16:20:39,894 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-09 16:20:39,896 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-09 16:20:39,897 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-09 16:20:39,898 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-09 16:20:39,899 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-09 16:20:39,900 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-09 16:20:39,902 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-09 16:20:39,903 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-09 16:20:39,904 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-09 16:20:39,905 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-09 16:20:39,906 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-09 16:20:39,906 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-09 16:20:39,906 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-09 16:20:39,907 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-09 16:20:39,908 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-09 16:20:39,909 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-McrAutomaton-SP.epf [2020-11-09 16:20:39,966 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-09 16:20:39,966 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-09 16:20:39,971 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-09 16:20:39,971 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-09 16:20:39,972 INFO L138 SettingsManager]: * Use SBE=true [2020-11-09 16:20:39,972 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-09 16:20:39,972 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-09 16:20:39,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-09 16:20:39,973 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-09 16:20:39,973 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-09 16:20:39,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-09 16:20:39,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-09 16:20:39,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-09 16:20:39,975 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-09 16:20:39,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-09 16:20:39,976 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-09 16:20:39,976 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-09 16:20:39,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-09 16:20:39,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-09 16:20:39,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-09 16:20:39,978 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-09 16:20:39,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-09 16:20:39,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-09 16:20:39,979 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-11-09 16:20:39,979 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-09 16:20:39,979 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-09 16:20:39,979 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-09 16:20:39,980 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-11-09 16:20:39,980 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-11-09 16:20:39,980 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-09 16:20:39,980 INFO L138 SettingsManager]: * Interpolant automaton=MCR WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-09 16:20:40,485 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-09 16:20:40,519 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-09 16:20:40,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-09 16:20:40,524 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-09 16:20:40,525 INFO L275 PluginConnector]: CDTParser initialized [2020-11-09 16:20:40,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-11-09 16:20:40,623 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e028cea5/6882c2182d8e4e0898eb0a5433cd7984/FLAG1c4b0c8d4 [2020-11-09 16:20:41,383 INFO L306 CDTParser]: Found 1 translation units. [2020-11-09 16:20:41,384 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longest-2.i [2020-11-09 16:20:41,400 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e028cea5/6882c2182d8e4e0898eb0a5433cd7984/FLAG1c4b0c8d4 [2020-11-09 16:20:41,642 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0e028cea5/6882c2182d8e4e0898eb0a5433cd7984 [2020-11-09 16:20:41,645 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-09 16:20:41,652 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-09 16:20:41,654 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-09 16:20:41,654 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-09 16:20:41,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-09 16:20:41,660 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:20:41" (1/1) ... [2020-11-09 16:20:41,668 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@71a7a8ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:41, skipping insertion in model container [2020-11-09 16:20:41,668 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 04:20:41" (1/1) ... [2020-11-09 16:20:41,679 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-09 16:20:41,718 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-09 16:20:42,137 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 16:20:42,152 INFO L203 MainTranslator]: Completed pre-run [2020-11-09 16:20:42,209 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-09 16:20:42,325 INFO L208 MainTranslator]: Completed translation [2020-11-09 16:20:42,327 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:42 WrapperNode [2020-11-09 16:20:42,327 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-09 16:20:42,329 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-09 16:20:42,329 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-09 16:20:42,329 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-09 16:20:42,339 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:42" (1/1) ... [2020-11-09 16:20:42,355 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:42" (1/1) ... [2020-11-09 16:20:42,377 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-09 16:20:42,378 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-09 16:20:42,378 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-09 16:20:42,379 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-09 16:20:42,388 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:42" (1/1) ... [2020-11-09 16:20:42,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:42" (1/1) ... [2020-11-09 16:20:42,392 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:42" (1/1) ... [2020-11-09 16:20:42,392 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:42" (1/1) ... [2020-11-09 16:20:42,398 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:42" (1/1) ... [2020-11-09 16:20:42,403 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:42" (1/1) ... [2020-11-09 16:20:42,411 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:42" (1/1) ... [2020-11-09 16:20:42,417 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-09 16:20:42,418 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-09 16:20:42,418 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-09 16:20:42,419 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-09 16:20:42,419 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:42" (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 [2020-11-09 16:20:42,496 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-09 16:20:42,496 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-09 16:20:42,496 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-09 16:20:42,497 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-09 16:20:42,497 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-09 16:20:42,497 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-09 16:20:42,497 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-09 16:20:42,497 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-09 16:20:42,498 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-09 16:20:42,498 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-09 16:20:42,498 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-09 16:20:42,498 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-09 16:20:42,500 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-09 16:20:42,962 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-09 16:20:42,963 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-09 16:20:42,965 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:20:42 BoogieIcfgContainer [2020-11-09 16:20:42,965 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-09 16:20:42,967 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-09 16:20:42,967 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-09 16:20:42,970 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-09 16:20:42,970 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 04:20:41" (1/3) ... [2020-11-09 16:20:42,971 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe32d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:20:42, skipping insertion in model container [2020-11-09 16:20:42,971 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 04:20:42" (2/3) ... [2020-11-09 16:20:42,972 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fe32d24 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 04:20:42, skipping insertion in model container [2020-11-09 16:20:42,972 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 04:20:42" (3/3) ... [2020-11-09 16:20:42,974 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longest-2.i [2020-11-09 16:20:42,989 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-09 16:20:42,989 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-09 16:20:42,993 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-09 16:20:42,994 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-09 16:20:43,022 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,023 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,023 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,023 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,024 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,024 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,024 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,024 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,025 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,025 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,025 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,025 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,026 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,026 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,026 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,026 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,027 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,027 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,027 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,027 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,028 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,028 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,028 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,028 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,029 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,029 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,029 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,029 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,030 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,030 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,030 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,031 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,031 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,031 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,031 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,032 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,032 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,032 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,032 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,033 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,033 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,033 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,034 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,034 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,034 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,034 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,035 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,035 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,035 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,035 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,036 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,036 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,036 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,036 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,037 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,037 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,039 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,040 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,040 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,040 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,040 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,041 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,047 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,047 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,048 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,048 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,048 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,048 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-09 16:20:43,051 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-09 16:20:43,063 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-09 16:20:43,087 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-09 16:20:43,087 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-09 16:20:43,087 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-09 16:20:43,088 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-11-09 16:20:43,088 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-09 16:20:43,088 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-09 16:20:43,088 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-09 16:20:43,088 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-09 16:20:43,101 INFO L128 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-11-09 16:20:43,102 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 16:20:43,105 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-09 16:20:43,108 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-09 16:20:43,148 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-09 16:20:43,148 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-09 16:20:43,153 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 97 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-09 16:20:43,156 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-09 16:20:44,986 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 16:20:45,144 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-11-09 16:20:45,906 WARN L194 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 16:20:46,022 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 16:20:46,294 WARN L194 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2020-11-09 16:20:46,409 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-11-09 16:20:46,833 WARN L194 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 16:20:46,975 WARN L194 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 16:20:47,302 WARN L194 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 89 [2020-11-09 16:20:47,463 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-09 16:20:47,506 INFO L131 LiptonReduction]: Checked pairs total: 1187 [2020-11-09 16:20:47,506 INFO L133 LiptonReduction]: Total number of compositions: 62 [2020-11-09 16:20:47,514 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-09 16:20:47,523 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-11-09 16:20:47,525 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-11-09 16:20:47,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-09 16:20:47,530 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:47,531 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-09 16:20:47,531 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:47,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:47,537 INFO L82 PathProgramCache]: Analyzing trace with hash -805875314, now seen corresponding path program 1 times [2020-11-09 16:20:47,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:47,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385528928] [2020-11-09 16:20:47,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:47,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385528928] [2020-11-09 16:20:47,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 16:20:47,803 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-09 16:20:47,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [679526312] [2020-11-09 16:20:47,805 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:47,810 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:47,825 INFO L252 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-11-09 16:20:47,825 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:47,833 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:47,833 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-09 16:20:47,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:47,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-09 16:20:47,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-09 16:20:47,854 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-11-09 16:20:47,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:47,917 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-09 16:20:47,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-09 16:20:47,919 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-11-09 16:20:47,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:47,930 INFO L225 Difference]: With dead ends: 75 [2020-11-09 16:20:47,930 INFO L226 Difference]: Without dead ends: 42 [2020-11-09 16:20:47,931 INFO L677 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 [2020-11-09 16:20:47,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-09 16:20:47,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-09 16:20:47,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 16:20:47,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-09 16:20:47,974 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-09 16:20:47,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:47,975 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-09 16:20:47,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-11-09 16:20:47,975 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-09 16:20:47,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-09 16:20:47,976 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:47,976 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:47,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-09 16:20:47,977 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:47,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:47,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1351909113, now seen corresponding path program 1 times [2020-11-09 16:20:47,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:47,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106116763] [2020-11-09 16:20:47,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:48,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:48,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106116763] [2020-11-09 16:20:48,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 16:20:48,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-09 16:20:48,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [483936769] [2020-11-09 16:20:48,067 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:48,068 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:48,072 INFO L252 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-11-09 16:20:48,072 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:48,105 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:48,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-09 16:20:48,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:48,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-09 16:20:48,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-09 16:20:48,108 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-11-09 16:20:48,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:48,145 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-09 16:20:48,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-09 16:20:48,147 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-11-09 16:20:48,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:48,149 INFO L225 Difference]: With dead ends: 56 [2020-11-09 16:20:48,149 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 16:20:48,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-09 16:20:48,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 16:20:48,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 16:20:48,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 16:20:48,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-09 16:20:48,158 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-09 16:20:48,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:48,159 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-09 16:20:48,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-09 16:20:48,160 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-09 16:20:48,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 16:20:48,161 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:48,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:48,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-09 16:20:48,161 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:48,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:48,162 INFO L82 PathProgramCache]: Analyzing trace with hash 2021583950, now seen corresponding path program 1 times [2020-11-09 16:20:48,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:48,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097614015] [2020-11-09 16:20:48,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:48,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:48,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097614015] [2020-11-09 16:20:48,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 16:20:48,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 16:20:48,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1762687463] [2020-11-09 16:20:48,272 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:48,273 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:48,276 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 25 transitions. [2020-11-09 16:20:48,276 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:48,284 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:48,285 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:48,310 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:48,311 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:48,334 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:48,334 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:48,350 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [474#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:20:48,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 16:20:48,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:48,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 16:20:48,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-09 16:20:48,352 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 7 states. [2020-11-09 16:20:48,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:48,465 INFO L93 Difference]: Finished difference Result 66 states and 152 transitions. [2020-11-09 16:20:48,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-09 16:20:48,466 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-09 16:20:48,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:48,467 INFO L225 Difference]: With dead ends: 66 [2020-11-09 16:20:48,468 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 16:20:48,468 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-09 16:20:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 16:20:48,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-09 16:20:48,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 16:20:48,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-11-09 16:20:48,476 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 10 [2020-11-09 16:20:48,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:48,476 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-11-09 16:20:48,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 16:20:48,477 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-11-09 16:20:48,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-09 16:20:48,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:48,478 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:48,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-09 16:20:48,478 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:48,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:48,479 INFO L82 PathProgramCache]: Analyzing trace with hash 2082353870, now seen corresponding path program 2 times [2020-11-09 16:20:48,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:48,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458886751] [2020-11-09 16:20:48,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:48,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:48,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458886751] [2020-11-09 16:20:48,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-09 16:20:48,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-09 16:20:48,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1822533353] [2020-11-09 16:20:48,605 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:48,606 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:48,609 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-11-09 16:20:48,609 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:48,629 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:48,630 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:48,661 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [639#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:48,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 16:20:48,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:48,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 16:20:48,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-11-09 16:20:48,664 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 7 states. [2020-11-09 16:20:48,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:48,750 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-11-09 16:20:48,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-09 16:20:48,751 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-11-09 16:20:48,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:48,752 INFO L225 Difference]: With dead ends: 67 [2020-11-09 16:20:48,752 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 16:20:48,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-09 16:20:48,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 16:20:48,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2020-11-09 16:20:48,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 16:20:48,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-11-09 16:20:48,760 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 10 [2020-11-09 16:20:48,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:48,760 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-11-09 16:20:48,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 16:20:48,761 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-11-09 16:20:48,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 16:20:48,762 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:48,762 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:48,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-09 16:20:48,762 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:48,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:48,765 INFO L82 PathProgramCache]: Analyzing trace with hash 735328415, now seen corresponding path program 3 times [2020-11-09 16:20:48,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:48,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462536705] [2020-11-09 16:20:48,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:48,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:48,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:48,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462536705] [2020-11-09 16:20:48,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558502470] [2020-11-09 16:20:48,907 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 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 [2020-11-09 16:20:48,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-09 16:20:48,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:48,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 16:20:49,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:49,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:20:49,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:49,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:49,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 16:20:49,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2099421268] [2020-11-09 16:20:49,057 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:49,058 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:49,061 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-11-09 16:20:49,061 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:49,090 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [835#(and (<= ~i~0 5) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:49,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 16:20:49,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:49,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 16:20:49,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 16:20:49,092 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 8 states. [2020-11-09 16:20:49,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:49,357 INFO L93 Difference]: Finished difference Result 63 states and 147 transitions. [2020-11-09 16:20:49,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 16:20:49,358 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-11-09 16:20:49,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:49,359 INFO L225 Difference]: With dead ends: 63 [2020-11-09 16:20:49,359 INFO L226 Difference]: Without dead ends: 54 [2020-11-09 16:20:49,359 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-11-09 16:20:49,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-09 16:20:49,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 37. [2020-11-09 16:20:49,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-11-09 16:20:49,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 87 transitions. [2020-11-09 16:20:49,366 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 87 transitions. Word has length 11 [2020-11-09 16:20:49,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:49,366 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 87 transitions. [2020-11-09 16:20:49,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 16:20:49,367 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 87 transitions. [2020-11-09 16:20:49,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-09 16:20:49,367 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:49,368 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:49,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:49,581 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:49,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:49,582 INFO L82 PathProgramCache]: Analyzing trace with hash 128488628, now seen corresponding path program 4 times [2020-11-09 16:20:49,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:49,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356535634] [2020-11-09 16:20:49,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:49,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:49,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356535634] [2020-11-09 16:20:49,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569918430] [2020-11-09 16:20:49,653 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 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 [2020-11-09 16:20:49,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:20:49,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:49,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-09 16:20:49,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:49,784 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:49,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:49,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-09 16:20:49,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1323835366] [2020-11-09 16:20:49,806 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:49,808 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:49,813 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-11-09 16:20:49,814 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:49,860 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:49,861 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-09 16:20:49,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:49,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-09 16:20:49,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-09 16:20:49,865 INFO L87 Difference]: Start difference. First operand 37 states and 87 transitions. Second operand 7 states. [2020-11-09 16:20:50,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:50,017 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-11-09 16:20:50,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-09 16:20:50,019 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-11-09 16:20:50,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:50,020 INFO L225 Difference]: With dead ends: 56 [2020-11-09 16:20:50,020 INFO L226 Difference]: Without dead ends: 51 [2020-11-09 16:20:50,020 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-11-09 16:20:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-09 16:20:50,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2020-11-09 16:20:50,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-11-09 16:20:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-09 16:20:50,056 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-09 16:20:50,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:50,056 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-09 16:20:50,056 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-09 16:20:50,056 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-09 16:20:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 16:20:50,057 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:50,057 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:50,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:50,273 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:50,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:50,274 INFO L82 PathProgramCache]: Analyzing trace with hash 1416964401, now seen corresponding path program 5 times [2020-11-09 16:20:50,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:50,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16251890] [2020-11-09 16:20:50,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:50,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:50,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16251890] [2020-11-09 16:20:50,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017052718] [2020-11-09 16:20:50,371 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 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 [2020-11-09 16:20:50,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:20:50,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:50,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 16:20:50,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:50,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:50,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:50,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-09 16:20:50,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1848633113] [2020-11-09 16:20:50,469 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:50,470 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:50,473 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 27 transitions. [2020-11-09 16:20:50,473 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:50,475 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:50,475 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:50,500 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:50,501 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:50,534 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:50,535 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:50,560 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1218#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:20:50,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 16:20:50,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:50,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 16:20:50,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-09 16:20:50,562 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 9 states. [2020-11-09 16:20:50,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:50,728 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-11-09 16:20:50,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 16:20:50,729 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 16:20:50,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:50,730 INFO L225 Difference]: With dead ends: 56 [2020-11-09 16:20:50,730 INFO L226 Difference]: Without dead ends: 50 [2020-11-09 16:20:50,731 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-11-09 16:20:50,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-09 16:20:50,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-11-09 16:20:50,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-11-09 16:20:50,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 113 transitions. [2020-11-09 16:20:50,737 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 113 transitions. Word has length 12 [2020-11-09 16:20:50,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:50,737 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 113 transitions. [2020-11-09 16:20:50,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 16:20:50,737 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 113 transitions. [2020-11-09 16:20:50,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 16:20:50,738 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:50,739 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:50,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:50,951 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:50,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:50,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1320372483, now seen corresponding path program 6 times [2020-11-09 16:20:50,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:50,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770700753] [2020-11-09 16:20:50,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:50,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:51,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:51,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770700753] [2020-11-09 16:20:51,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773081548] [2020-11-09 16:20:51,026 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 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 [2020-11-09 16:20:51,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-09 16:20:51,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:51,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 16:20:51,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:51,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:51,131 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:51,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:51,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 16:20:51,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [596313249] [2020-11-09 16:20:51,132 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:51,133 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:51,135 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-11-09 16:20:51,136 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:51,143 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:51,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-09 16:20:51,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:51,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-09 16:20:51,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-09 16:20:51,145 INFO L87 Difference]: Start difference. First operand 47 states and 113 transitions. Second operand 8 states. [2020-11-09 16:20:51,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:51,342 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 16:20:51,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 16:20:51,343 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-11-09 16:20:51,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:51,344 INFO L225 Difference]: With dead ends: 64 [2020-11-09 16:20:51,344 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 16:20:51,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-11-09 16:20:51,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 16:20:51,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 42. [2020-11-09 16:20:51,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-11-09 16:20:51,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-11-09 16:20:51,350 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 12 [2020-11-09 16:20:51,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:51,350 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-11-09 16:20:51,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-11-09 16:20:51,350 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-11-09 16:20:51,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-09 16:20:51,351 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:51,351 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:51,561 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:51,562 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:51,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:51,563 INFO L82 PathProgramCache]: Analyzing trace with hash -311794613, now seen corresponding path program 7 times [2020-11-09 16:20:51,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:51,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245400877] [2020-11-09 16:20:51,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:51,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:51,670 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:51,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245400877] [2020-11-09 16:20:51,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327663319] [2020-11-09 16:20:51,671 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 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 [2020-11-09 16:20:51,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:51,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-09 16:20:51,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:51,767 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:20:51,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:51,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:51,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-09 16:20:51,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1259311862] [2020-11-09 16:20:51,799 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:51,800 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:51,803 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-11-09 16:20:51,803 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:51,835 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1631#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:51,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 16:20:51,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:51,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 16:20:51,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-11-09 16:20:51,837 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 9 states. [2020-11-09 16:20:52,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:52,059 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 16:20:52,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-09 16:20:52,063 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-11-09 16:20:52,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:52,064 INFO L225 Difference]: With dead ends: 72 [2020-11-09 16:20:52,064 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 16:20:52,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=86, Invalid=186, Unknown=0, NotChecked=0, Total=272 [2020-11-09 16:20:52,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 16:20:52,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 48. [2020-11-09 16:20:52,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-11-09 16:20:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-11-09 16:20:52,075 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 12 [2020-11-09 16:20:52,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:52,075 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-11-09 16:20:52,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 16:20:52,076 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-11-09 16:20:52,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 16:20:52,079 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:52,079 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:52,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:52,280 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:52,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:52,281 INFO L82 PathProgramCache]: Analyzing trace with hash -2018100772, now seen corresponding path program 8 times [2020-11-09 16:20:52,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:52,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760940937] [2020-11-09 16:20:52,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:52,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:52,361 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:52,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760940937] [2020-11-09 16:20:52,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821042007] [2020-11-09 16:20:52,362 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 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 [2020-11-09 16:20:52,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:20:52,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:52,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 16:20:52,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:52,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:52,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:52,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 16:20:52,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [41373671] [2020-11-09 16:20:52,489 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:52,491 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:52,493 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-11-09 16:20:52,493 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:52,517 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1860#(and (<= ~i~0 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:52,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 16:20:52,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:52,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 16:20:52,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-11-09 16:20:52,518 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 10 states. [2020-11-09 16:20:52,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:52,862 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-11-09 16:20:52,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 16:20:52,862 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-11-09 16:20:52,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:52,863 INFO L225 Difference]: With dead ends: 72 [2020-11-09 16:20:52,863 INFO L226 Difference]: Without dead ends: 63 [2020-11-09 16:20:52,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-11-09 16:20:52,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-09 16:20:52,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 41. [2020-11-09 16:20:52,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-11-09 16:20:52,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 97 transitions. [2020-11-09 16:20:52,869 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 97 transitions. Word has length 13 [2020-11-09 16:20:52,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:52,869 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 97 transitions. [2020-11-09 16:20:52,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 16:20:52,869 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 97 transitions. [2020-11-09 16:20:52,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-09 16:20:52,870 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:52,870 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:53,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:53,081 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:53,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:53,082 INFO L82 PathProgramCache]: Analyzing trace with hash -1075670313, now seen corresponding path program 9 times [2020-11-09 16:20:53,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:53,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595462979] [2020-11-09 16:20:53,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:53,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:53,201 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:53,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595462979] [2020-11-09 16:20:53,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051780259] [2020-11-09 16:20:53,202 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 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 [2020-11-09 16:20:53,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-09 16:20:53,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:53,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-09 16:20:53,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:53,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:53,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:53,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-09 16:20:53,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [976145391] [2020-11-09 16:20:53,328 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:53,330 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:53,334 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-11-09 16:20:53,334 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:53,370 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:53,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-09 16:20:53,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:53,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-09 16:20:53,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-09 16:20:53,371 INFO L87 Difference]: Start difference. First operand 41 states and 97 transitions. Second operand 9 states. [2020-11-09 16:20:53,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:53,638 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-11-09 16:20:53,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-09 16:20:53,639 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-11-09 16:20:53,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:53,640 INFO L225 Difference]: With dead ends: 64 [2020-11-09 16:20:53,640 INFO L226 Difference]: Without dead ends: 59 [2020-11-09 16:20:53,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-11-09 16:20:53,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-11-09 16:20:53,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 49. [2020-11-09 16:20:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 16:20:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-09 16:20:53,646 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-09 16:20:53,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:53,647 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-09 16:20:53,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-09 16:20:53,647 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-09 16:20:53,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 16:20:53,648 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:53,648 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:53,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:53,862 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:53,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:53,863 INFO L82 PathProgramCache]: Analyzing trace with hash 198162772, now seen corresponding path program 10 times [2020-11-09 16:20:53,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:53,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029293213] [2020-11-09 16:20:53,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:53,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:54,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:54,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029293213] [2020-11-09 16:20:54,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934304680] [2020-11-09 16:20:54,064 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 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 [2020-11-09 16:20:54,127 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:20:54,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:54,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 16:20:54,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:54,132 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:54,143 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:54,144 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:54,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-09 16:20:54,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [193959553] [2020-11-09 16:20:54,144 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:54,146 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:54,150 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-11-09 16:20:54,150 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:54,181 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:54,181 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:54,213 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:54,214 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:54,232 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:54,232 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:54,250 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2312#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:20:54,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 16:20:54,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:54,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 16:20:54,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 16:20:54,251 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 11 states. [2020-11-09 16:20:54,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:54,508 INFO L93 Difference]: Finished difference Result 64 states and 151 transitions. [2020-11-09 16:20:54,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-09 16:20:54,510 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 16:20:54,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:54,511 INFO L225 Difference]: With dead ends: 64 [2020-11-09 16:20:54,511 INFO L226 Difference]: Without dead ends: 58 [2020-11-09 16:20:54,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-11-09 16:20:54,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-09 16:20:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 53. [2020-11-09 16:20:54,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 16:20:54,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 129 transitions. [2020-11-09 16:20:54,521 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 129 transitions. Word has length 14 [2020-11-09 16:20:54,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:54,522 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 129 transitions. [2020-11-09 16:20:54,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 16:20:54,524 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 129 transitions. [2020-11-09 16:20:54,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 16:20:54,525 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:54,525 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:54,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-11-09 16:20:54,727 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:54,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:54,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1863413606, now seen corresponding path program 11 times [2020-11-09 16:20:54,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:54,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937739763] [2020-11-09 16:20:54,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:54,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:54,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937739763] [2020-11-09 16:20:54,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929765403] [2020-11-09 16:20:54,879 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 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 [2020-11-09 16:20:54,962 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-09 16:20:54,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:54,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 16:20:54,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:54,992 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:55,006 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:55,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:55,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 16:20:55,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1395700966] [2020-11-09 16:20:55,008 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:55,010 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:55,013 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 22 transitions. [2020-11-09 16:20:55,013 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:55,026 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:55,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-09 16:20:55,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:55,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-09 16:20:55,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-09 16:20:55,027 INFO L87 Difference]: Start difference. First operand 53 states and 129 transitions. Second operand 10 states. [2020-11-09 16:20:55,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:55,352 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-11-09 16:20:55,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 16:20:55,353 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-11-09 16:20:55,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:55,354 INFO L225 Difference]: With dead ends: 74 [2020-11-09 16:20:55,354 INFO L226 Difference]: Without dead ends: 69 [2020-11-09 16:20:55,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-11-09 16:20:55,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-11-09 16:20:55,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 46. [2020-11-09 16:20:55,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-11-09 16:20:55,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 109 transitions. [2020-11-09 16:20:55,359 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 109 transitions. Word has length 14 [2020-11-09 16:20:55,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:55,359 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 109 transitions. [2020-11-09 16:20:55,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-11-09 16:20:55,360 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 109 transitions. [2020-11-09 16:20:55,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-09 16:20:55,360 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:55,360 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:55,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:55,571 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:55,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:55,572 INFO L82 PathProgramCache]: Analyzing trace with hash 1013983880, now seen corresponding path program 12 times [2020-11-09 16:20:55,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:55,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033872417] [2020-11-09 16:20:55,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:55,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:55,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:55,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033872417] [2020-11-09 16:20:55,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257449283] [2020-11-09 16:20:55,657 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 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 [2020-11-09 16:20:55,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-09 16:20:55,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:55,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-09 16:20:55,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:55,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:20:55,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:55,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:55,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-09 16:20:55,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [37217989] [2020-11-09 16:20:55,780 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:55,782 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:55,785 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 28 transitions. [2020-11-09 16:20:55,785 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:55,835 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [2791#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-11-09 16:20:55,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 16:20:55,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:55,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 16:20:55,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-11-09 16:20:55,837 INFO L87 Difference]: Start difference. First operand 46 states and 109 transitions. Second operand 11 states. [2020-11-09 16:20:56,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:56,197 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 16:20:56,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 16:20:56,198 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-11-09 16:20:56,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:56,199 INFO L225 Difference]: With dead ends: 82 [2020-11-09 16:20:56,199 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 16:20:56,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-11-09 16:20:56,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 16:20:56,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-11-09 16:20:56,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-09 16:20:56,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-11-09 16:20:56,204 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 14 [2020-11-09 16:20:56,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:56,205 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-11-09 16:20:56,205 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 16:20:56,205 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-11-09 16:20:56,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 16:20:56,206 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:56,206 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:56,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:56,417 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:56,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:56,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1931272153, now seen corresponding path program 13 times [2020-11-09 16:20:56,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:56,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429571824] [2020-11-09 16:20:56,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:56,516 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:56,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429571824] [2020-11-09 16:20:56,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623910800] [2020-11-09 16:20:56,517 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 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 [2020-11-09 16:20:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:56,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 16:20:56,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:56,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:20:56,642 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:56,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:56,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 16:20:56,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [681415553] [2020-11-09 16:20:56,643 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:56,645 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:56,648 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 25 transitions. [2020-11-09 16:20:56,648 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:56,677 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3058#(and (<= ~i~0 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:20:56,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 16:20:56,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:56,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 16:20:56,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2020-11-09 16:20:56,678 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 12 states. [2020-11-09 16:20:57,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:57,113 INFO L93 Difference]: Finished difference Result 82 states and 193 transitions. [2020-11-09 16:20:57,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 16:20:57,113 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-11-09 16:20:57,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:57,114 INFO L225 Difference]: With dead ends: 82 [2020-11-09 16:20:57,114 INFO L226 Difference]: Without dead ends: 73 [2020-11-09 16:20:57,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-11-09 16:20:57,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-09 16:20:57,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 45. [2020-11-09 16:20:57,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-11-09 16:20:57,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-11-09 16:20:57,120 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 15 [2020-11-09 16:20:57,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:57,121 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-11-09 16:20:57,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 16:20:57,121 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-11-09 16:20:57,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-09 16:20:57,122 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:57,122 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:57,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-09 16:20:57,333 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:57,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:57,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1368757306, now seen corresponding path program 14 times [2020-11-09 16:20:57,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:57,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762471526] [2020-11-09 16:20:57,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:57,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:57,438 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:57,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762471526] [2020-11-09 16:20:57,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450346794] [2020-11-09 16:20:57,439 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 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 [2020-11-09 16:20:57,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:20:57,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:57,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-09 16:20:57,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:57,547 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:57,579 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:57,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:57,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-09 16:20:57,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1643205996] [2020-11-09 16:20:57,580 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:57,581 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:57,584 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 27 transitions. [2020-11-09 16:20:57,584 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:57,604 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:57,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-09 16:20:57,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:57,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-09 16:20:57,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-09 16:20:57,606 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 11 states. [2020-11-09 16:20:57,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:57,968 INFO L93 Difference]: Finished difference Result 72 states and 173 transitions. [2020-11-09 16:20:57,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-09 16:20:57,973 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-11-09 16:20:57,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:57,973 INFO L225 Difference]: With dead ends: 72 [2020-11-09 16:20:57,974 INFO L226 Difference]: Without dead ends: 67 [2020-11-09 16:20:57,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=192, Invalid=408, Unknown=0, NotChecked=0, Total=600 [2020-11-09 16:20:57,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-09 16:20:57,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 55. [2020-11-09 16:20:57,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-11-09 16:20:57,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-09 16:20:57,978 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-09 16:20:57,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:57,978 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-09 16:20:57,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-09 16:20:57,978 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-09 16:20:57,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 16:20:57,979 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:57,979 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:58,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-09 16:20:58,186 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:58,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:58,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1455869111, now seen corresponding path program 15 times [2020-11-09 16:20:58,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:58,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333297194] [2020-11-09 16:20:58,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:58,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:58,335 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:58,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333297194] [2020-11-09 16:20:58,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690172094] [2020-11-09 16:20:58,336 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 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 [2020-11-09 16:20:58,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-09 16:20:58,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:58,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 16:20:58,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:58,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:58,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:58,426 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:58,426 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-09 16:20:58,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1350539618] [2020-11-09 16:20:58,426 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:58,428 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:58,432 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 31 transitions. [2020-11-09 16:20:58,432 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:58,443 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:58,446 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:58,472 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:58,472 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:58,489 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:20:58,490 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:20:58,506 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3580#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:20:58,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 16:20:58,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:58,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 16:20:58,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-11-09 16:20:58,507 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 13 states. [2020-11-09 16:20:58,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:58,810 INFO L93 Difference]: Finished difference Result 72 states and 171 transitions. [2020-11-09 16:20:58,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-09 16:20:58,811 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 16:20:58,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:58,812 INFO L225 Difference]: With dead ends: 72 [2020-11-09 16:20:58,812 INFO L226 Difference]: Without dead ends: 66 [2020-11-09 16:20:58,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-11-09 16:20:58,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-09 16:20:58,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 59. [2020-11-09 16:20:58,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-11-09 16:20:58,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-11-09 16:20:58,820 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 16 [2020-11-09 16:20:58,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:58,821 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-11-09 16:20:58,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 16:20:58,821 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-11-09 16:20:58,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 16:20:58,821 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:58,821 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:59,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-09 16:20:59,032 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:59,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:59,032 INFO L82 PathProgramCache]: Analyzing trace with hash -260077303, now seen corresponding path program 16 times [2020-11-09 16:20:59,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:59,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014369319] [2020-11-09 16:20:59,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:20:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:20:59,160 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:59,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014369319] [2020-11-09 16:20:59,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6930255] [2020-11-09 16:20:59,161 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 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 [2020-11-09 16:20:59,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:20:59,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:20:59,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 16:20:59,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:20:59,253 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:20:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:20:59,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:20:59,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 16:20:59,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2110041563] [2020-11-09 16:20:59,270 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:20:59,272 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:20:59,275 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 24 transitions. [2020-11-09 16:20:59,275 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:20:59,288 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:20:59,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-09 16:20:59,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:20:59,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-09 16:20:59,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-09 16:20:59,290 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 12 states. [2020-11-09 16:20:59,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:20:59,773 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-11-09 16:20:59,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 16:20:59,774 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-11-09 16:20:59,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:20:59,775 INFO L225 Difference]: With dead ends: 84 [2020-11-09 16:20:59,775 INFO L226 Difference]: Without dead ends: 79 [2020-11-09 16:20:59,776 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-11-09 16:20:59,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-09 16:20:59,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 50. [2020-11-09 16:20:59,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-11-09 16:20:59,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 119 transitions. [2020-11-09 16:20:59,780 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 119 transitions. Word has length 16 [2020-11-09 16:20:59,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:20:59,780 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 119 transitions. [2020-11-09 16:20:59,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-11-09 16:20:59,780 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 119 transitions. [2020-11-09 16:20:59,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-09 16:20:59,780 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:20:59,781 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:20:59,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:20:59,990 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:20:59,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:20:59,991 INFO L82 PathProgramCache]: Analyzing trace with hash -518171259, now seen corresponding path program 17 times [2020-11-09 16:20:59,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:20:59,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [748246039] [2020-11-09 16:20:59,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:00,097 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:00,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [748246039] [2020-11-09 16:21:00,097 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036459683] [2020-11-09 16:21:00,097 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 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 [2020-11-09 16:21:00,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-09 16:21:00,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:00,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-09 16:21:00,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:00,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:00,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:00,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:00,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-09 16:21:00,229 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [174014891] [2020-11-09 16:21:00,229 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:00,231 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:00,235 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 30 transitions. [2020-11-09 16:21:00,235 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:00,275 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4125#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:00,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 16:21:00,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:00,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 16:21:00,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-11-09 16:21:00,276 INFO L87 Difference]: Start difference. First operand 50 states and 119 transitions. Second operand 13 states. [2020-11-09 16:21:00,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:00,805 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 16:21:00,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 16:21:00,805 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-11-09 16:21:00,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:00,807 INFO L225 Difference]: With dead ends: 92 [2020-11-09 16:21:00,807 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 16:21:00,808 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-11-09 16:21:00,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 16:21:00,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-11-09 16:21:00,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-11-09 16:21:00,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-11-09 16:21:00,811 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 16 [2020-11-09 16:21:00,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:00,812 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-11-09 16:21:00,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 16:21:00,812 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-11-09 16:21:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 16:21:00,812 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:00,812 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:01,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:01,013 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:01,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:01,014 INFO L82 PathProgramCache]: Analyzing trace with hash 527563414, now seen corresponding path program 18 times [2020-11-09 16:21:01,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:01,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523331015] [2020-11-09 16:21:01,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:01,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:01,144 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:01,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523331015] [2020-11-09 16:21:01,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896193654] [2020-11-09 16:21:01,144 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 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 [2020-11-09 16:21:01,250 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-09 16:21:01,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:01,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 16:21:01,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:01,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:01,325 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:01,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:01,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 16:21:01,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1716260310] [2020-11-09 16:21:01,326 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:01,329 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:01,334 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 27 transitions. [2020-11-09 16:21:01,334 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:01,364 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4430#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 11))] [2020-11-09 16:21:01,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 16:21:01,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:01,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 16:21:01,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2020-11-09 16:21:01,366 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 14 states. [2020-11-09 16:21:01,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:01,867 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-11-09 16:21:01,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 16:21:01,867 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-11-09 16:21:01,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:01,868 INFO L225 Difference]: With dead ends: 92 [2020-11-09 16:21:01,869 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 16:21:01,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=352, Invalid=770, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 16:21:01,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 16:21:01,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 49. [2020-11-09 16:21:01,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-11-09 16:21:01,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 117 transitions. [2020-11-09 16:21:01,875 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 117 transitions. Word has length 17 [2020-11-09 16:21:01,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:01,876 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 117 transitions. [2020-11-09 16:21:01,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 16:21:01,876 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 117 transitions. [2020-11-09 16:21:01,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-09 16:21:01,876 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:01,876 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:02,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:02,088 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:02,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:02,089 INFO L82 PathProgramCache]: Analyzing trace with hash 1116588253, now seen corresponding path program 19 times [2020-11-09 16:21:02,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:02,090 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004554288] [2020-11-09 16:21:02,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:02,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:02,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004554288] [2020-11-09 16:21:02,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217963261] [2020-11-09 16:21:02,215 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 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 [2020-11-09 16:21:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:02,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-09 16:21:02,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:02,337 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:02,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:02,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-09 16:21:02,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2003929250] [2020-11-09 16:21:02,355 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:02,356 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:02,360 INFO L252 McrAutomatonBuilder]: Finished intersection with 24 states and 29 transitions. [2020-11-09 16:21:02,361 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:02,383 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:02,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-09 16:21:02,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:02,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-09 16:21:02,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-09 16:21:02,386 INFO L87 Difference]: Start difference. First operand 49 states and 117 transitions. Second operand 13 states. [2020-11-09 16:21:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:02,886 INFO L93 Difference]: Finished difference Result 80 states and 193 transitions. [2020-11-09 16:21:02,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-09 16:21:02,886 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-11-09 16:21:02,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:02,887 INFO L225 Difference]: With dead ends: 80 [2020-11-09 16:21:02,887 INFO L226 Difference]: Without dead ends: 75 [2020-11-09 16:21:02,889 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=294, Invalid=636, Unknown=0, NotChecked=0, Total=930 [2020-11-09 16:21:02,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-11-09 16:21:02,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 61. [2020-11-09 16:21:02,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 16:21:02,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-09 16:21:02,893 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-09 16:21:02,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:02,893 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-09 16:21:02,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-09 16:21:02,893 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-09 16:21:02,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 16:21:02,894 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:02,894 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:03,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-11-09 16:21:03,106 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:03,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:03,106 INFO L82 PathProgramCache]: Analyzing trace with hash -1069116582, now seen corresponding path program 20 times [2020-11-09 16:21:03,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:03,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572645439] [2020-11-09 16:21:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:03,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:03,288 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:03,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572645439] [2020-11-09 16:21:03,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421753813] [2020-11-09 16:21:03,289 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 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 [2020-11-09 16:21:03,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:21:03,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:03,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 16:21:03,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:03,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:03,381 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:03,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:03,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-09 16:21:03,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1919073158] [2020-11-09 16:21:03,382 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:03,384 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:03,388 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 33 transitions. [2020-11-09 16:21:03,388 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:03,394 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:03,395 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:03,427 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:03,427 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:03,443 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:03,443 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:03,458 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5022#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:21:03,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 16:21:03,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:03,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 16:21:03,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-11-09 16:21:03,459 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 15 states. [2020-11-09 16:21:03,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:03,800 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-11-09 16:21:03,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-11-09 16:21:03,801 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 16:21:03,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:03,802 INFO L225 Difference]: With dead ends: 80 [2020-11-09 16:21:03,802 INFO L226 Difference]: Without dead ends: 74 [2020-11-09 16:21:03,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=482, Unknown=0, NotChecked=0, Total=702 [2020-11-09 16:21:03,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-09 16:21:03,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 65. [2020-11-09 16:21:03,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 16:21:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-11-09 16:21:03,813 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 18 [2020-11-09 16:21:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:03,814 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-11-09 16:21:03,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 16:21:03,814 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-11-09 16:21:03,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 16:21:03,814 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:03,814 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:04,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-09 16:21:04,015 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:04,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:04,016 INFO L82 PathProgramCache]: Analyzing trace with hash -825375252, now seen corresponding path program 21 times [2020-11-09 16:21:04,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:04,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29366966] [2020-11-09 16:21:04,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:04,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:04,189 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:04,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29366966] [2020-11-09 16:21:04,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745670013] [2020-11-09 16:21:04,190 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 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 [2020-11-09 16:21:04,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-09 16:21:04,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:04,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 16:21:04,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:04,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:04,343 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:04,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:04,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 16:21:04,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2038512168] [2020-11-09 16:21:04,344 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:04,345 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:04,348 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 26 transitions. [2020-11-09 16:21:04,348 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:04,354 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:04,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-09 16:21:04,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:04,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-09 16:21:04,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-09 16:21:04,355 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 14 states. [2020-11-09 16:21:04,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:04,944 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-11-09 16:21:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 16:21:04,945 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-11-09 16:21:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:04,946 INFO L225 Difference]: With dead ends: 94 [2020-11-09 16:21:04,946 INFO L226 Difference]: Without dead ends: 89 [2020-11-09 16:21:04,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=404, Invalid=856, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 16:21:04,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-11-09 16:21:04,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 54. [2020-11-09 16:21:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-11-09 16:21:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 129 transitions. [2020-11-09 16:21:04,952 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 129 transitions. Word has length 18 [2020-11-09 16:21:04,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:04,952 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 129 transitions. [2020-11-09 16:21:04,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-11-09 16:21:04,952 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 129 transitions. [2020-11-09 16:21:04,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-09 16:21:04,954 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:04,955 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:05,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-09 16:21:05,163 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:05,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:05,164 INFO L82 PathProgramCache]: Analyzing trace with hash 254522690, now seen corresponding path program 22 times [2020-11-09 16:21:05,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:05,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139954318] [2020-11-09 16:21:05,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:05,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:05,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:05,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139954318] [2020-11-09 16:21:05,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89937838] [2020-11-09 16:21:05,304 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 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 [2020-11-09 16:21:05,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:21:05,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:05,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-09 16:21:05,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:05,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:05,419 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:05,420 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:05,420 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-09 16:21:05,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2063058379] [2020-11-09 16:21:05,420 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:05,422 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:05,426 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 32 transitions. [2020-11-09 16:21:05,426 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:05,461 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5633#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-11-09 16:21:05,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 16:21:05,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:05,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 16:21:05,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-11-09 16:21:05,462 INFO L87 Difference]: Start difference. First operand 54 states and 129 transitions. Second operand 15 states. [2020-11-09 16:21:06,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:06,066 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-11-09 16:21:06,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 16:21:06,066 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-11-09 16:21:06,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:06,067 INFO L225 Difference]: With dead ends: 102 [2020-11-09 16:21:06,067 INFO L226 Difference]: Without dead ends: 93 [2020-11-09 16:21:06,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=365, Invalid=825, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 16:21:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-09 16:21:06,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 66. [2020-11-09 16:21:06,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-09 16:21:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-11-09 16:21:06,071 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 18 [2020-11-09 16:21:06,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:06,071 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-11-09 16:21:06,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 16:21:06,071 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-11-09 16:21:06,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 16:21:06,071 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:06,072 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:06,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-09 16:21:06,272 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:06,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:06,273 INFO L82 PathProgramCache]: Analyzing trace with hash 183196179, now seen corresponding path program 23 times [2020-11-09 16:21:06,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:06,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112053722] [2020-11-09 16:21:06,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:06,403 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:06,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112053722] [2020-11-09 16:21:06,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694283856] [2020-11-09 16:21:06,404 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 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 [2020-11-09 16:21:06,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-09 16:21:06,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:06,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 16:21:06,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:06,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:06,533 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:06,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:06,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 16:21:06,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1818749234] [2020-11-09 16:21:06,534 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:06,536 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:06,540 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 29 transitions. [2020-11-09 16:21:06,540 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:06,565 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [5976#(and (<= ~i~0 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:06,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 16:21:06,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:06,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 16:21:06,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-11-09 16:21:06,567 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 16 states. [2020-11-09 16:21:07,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:07,237 INFO L93 Difference]: Finished difference Result 102 states and 241 transitions. [2020-11-09 16:21:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 16:21:07,238 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-11-09 16:21:07,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:07,239 INFO L225 Difference]: With dead ends: 102 [2020-11-09 16:21:07,239 INFO L226 Difference]: Without dead ends: 93 [2020-11-09 16:21:07,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=488, Invalid=1072, Unknown=0, NotChecked=0, Total=1560 [2020-11-09 16:21:07,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-11-09 16:21:07,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 53. [2020-11-09 16:21:07,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-11-09 16:21:07,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 127 transitions. [2020-11-09 16:21:07,243 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 127 transitions. Word has length 19 [2020-11-09 16:21:07,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:07,243 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 127 transitions. [2020-11-09 16:21:07,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 16:21:07,243 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 127 transitions. [2020-11-09 16:21:07,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-09 16:21:07,244 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:07,244 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:07,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-09 16:21:07,453 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:07,454 INFO L82 PathProgramCache]: Analyzing trace with hash -699703104, now seen corresponding path program 24 times [2020-11-09 16:21:07,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:07,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30769504] [2020-11-09 16:21:07,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:07,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30769504] [2020-11-09 16:21:07,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000919954] [2020-11-09 16:21:07,596 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 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 [2020-11-09 16:21:07,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-09 16:21:07,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:07,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-09 16:21:07,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:07,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:07,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:07,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-09 16:21:07,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1460844343] [2020-11-09 16:21:07,719 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:07,722 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:07,724 INFO L252 McrAutomatonBuilder]: Finished intersection with 26 states and 31 transitions. [2020-11-09 16:21:07,724 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:07,740 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:07,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-09 16:21:07,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:07,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-09 16:21:07,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-09 16:21:07,742 INFO L87 Difference]: Start difference. First operand 53 states and 127 transitions. Second operand 15 states. [2020-11-09 16:21:08,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:08,379 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-11-09 16:21:08,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-09 16:21:08,379 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-11-09 16:21:08,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:08,380 INFO L225 Difference]: With dead ends: 88 [2020-11-09 16:21:08,380 INFO L226 Difference]: Without dead ends: 83 [2020-11-09 16:21:08,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=418, Invalid=914, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 16:21:08,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-09 16:21:08,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 67. [2020-11-09 16:21:08,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-11-09 16:21:08,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-11-09 16:21:08,386 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-11-09 16:21:08,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:08,387 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-11-09 16:21:08,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-09 16:21:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-11-09 16:21:08,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 16:21:08,387 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:08,387 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:08,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:08,591 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:08,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:08,592 INFO L82 PathProgramCache]: Analyzing trace with hash -923845315, now seen corresponding path program 25 times [2020-11-09 16:21:08,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:08,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939113976] [2020-11-09 16:21:08,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:08,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:08,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939113976] [2020-11-09 16:21:08,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204543787] [2020-11-09 16:21:08,809 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 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 [2020-11-09 16:21:08,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:08,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 16:21:08,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:08,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:08,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:08,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-09 16:21:08,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1321507098] [2020-11-09 16:21:08,908 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:08,910 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:08,915 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 35 transitions. [2020-11-09 16:21:08,915 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:08,917 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:08,917 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:08,949 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:08,949 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:08,973 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:08,973 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:08,989 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6638#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:21:08,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 16:21:08,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:08,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 16:21:08,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-11-09 16:21:08,991 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 17 states. [2020-11-09 16:21:09,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:09,394 INFO L93 Difference]: Finished difference Result 88 states and 211 transitions. [2020-11-09 16:21:09,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-09 16:21:09,395 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 16:21:09,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:09,396 INFO L225 Difference]: With dead ends: 88 [2020-11-09 16:21:09,396 INFO L226 Difference]: Without dead ends: 82 [2020-11-09 16:21:09,397 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2020-11-09 16:21:09,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-09 16:21:09,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 71. [2020-11-09 16:21:09,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-11-09 16:21:09,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-11-09 16:21:09,400 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 20 [2020-11-09 16:21:09,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:09,401 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-11-09 16:21:09,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 16:21:09,401 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-11-09 16:21:09,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 16:21:09,401 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:09,401 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:09,610 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-11-09 16:21:09,611 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:09,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:09,613 INFO L82 PathProgramCache]: Analyzing trace with hash 1384142351, now seen corresponding path program 26 times [2020-11-09 16:21:09,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:09,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281448192] [2020-11-09 16:21:09,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:09,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:09,763 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:09,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281448192] [2020-11-09 16:21:09,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665101401] [2020-11-09 16:21:09,764 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 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 [2020-11-09 16:21:09,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:21:09,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:09,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-09 16:21:09,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:09,863 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:09,881 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:09,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:09,882 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 16:21:09,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [195745652] [2020-11-09 16:21:09,882 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:09,885 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:09,888 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 28 transitions. [2020-11-09 16:21:09,888 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:09,897 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:09,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-09 16:21:09,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:09,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-09 16:21:09,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-09 16:21:09,898 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 16 states. [2020-11-09 16:21:10,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:10,693 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-11-09 16:21:10,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 16:21:10,693 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-11-09 16:21:10,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:10,694 INFO L225 Difference]: With dead ends: 104 [2020-11-09 16:21:10,694 INFO L226 Difference]: Without dead ends: 99 [2020-11-09 16:21:10,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=549, Invalid=1173, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 16:21:10,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-09 16:21:10,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 58. [2020-11-09 16:21:10,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-11-09 16:21:10,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 139 transitions. [2020-11-09 16:21:10,699 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 139 transitions. Word has length 20 [2020-11-09 16:21:10,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:10,699 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 139 transitions. [2020-11-09 16:21:10,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-11-09 16:21:10,699 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 139 transitions. [2020-11-09 16:21:10,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-09 16:21:10,700 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:10,700 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:10,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:10,907 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:10,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:10,907 INFO L82 PathProgramCache]: Analyzing trace with hash -215934529, now seen corresponding path program 27 times [2020-11-09 16:21:10,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:10,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982362358] [2020-11-09 16:21:10,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:10,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:11,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:11,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982362358] [2020-11-09 16:21:11,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381353588] [2020-11-09 16:21:11,059 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 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 [2020-11-09 16:21:11,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-09 16:21:11,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:11,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 16:21:11,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:11,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:11,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-09 16:21:11,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [641035092] [2020-11-09 16:21:11,208 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:11,210 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:11,214 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 34 transitions. [2020-11-09 16:21:11,215 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:11,254 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7315#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:11,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 16:21:11,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:11,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 16:21:11,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-11-09 16:21:11,256 INFO L87 Difference]: Start difference. First operand 58 states and 139 transitions. Second operand 17 states. [2020-11-09 16:21:12,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:12,062 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-11-09 16:21:12,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 16:21:12,063 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-11-09 16:21:12,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:12,064 INFO L225 Difference]: With dead ends: 112 [2020-11-09 16:21:12,064 INFO L226 Difference]: Without dead ends: 103 [2020-11-09 16:21:12,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=502, Invalid=1138, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 16:21:12,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-09 16:21:12,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2020-11-09 16:21:12,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-09 16:21:12,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-11-09 16:21:12,068 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 20 [2020-11-09 16:21:12,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:12,068 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-11-09 16:21:12,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 16:21:12,069 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-11-09 16:21:12,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 16:21:12,069 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:12,069 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:12,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-09 16:21:12,279 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:12,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:12,279 INFO L82 PathProgramCache]: Analyzing trace with hash -41234864, now seen corresponding path program 28 times [2020-11-09 16:21:12,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:12,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675454830] [2020-11-09 16:21:12,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:12,453 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:12,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675454830] [2020-11-09 16:21:12,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843092157] [2020-11-09 16:21:12,454 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 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 [2020-11-09 16:21:12,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:21:12,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:12,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 16:21:12,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:12,569 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:12,589 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:12,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:12,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 16:21:12,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [661827407] [2020-11-09 16:21:12,591 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:12,593 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:12,597 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 31 transitions. [2020-11-09 16:21:12,597 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:12,631 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7696#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 15))] [2020-11-09 16:21:12,632 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 16:21:12,632 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:12,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 16:21:12,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2020-11-09 16:21:12,633 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 18 states. [2020-11-09 16:21:13,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:13,546 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-11-09 16:21:13,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 16:21:13,546 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-11-09 16:21:13,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:13,547 INFO L225 Difference]: With dead ends: 112 [2020-11-09 16:21:13,547 INFO L226 Difference]: Without dead ends: 103 [2020-11-09 16:21:13,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=646, Invalid=1424, Unknown=0, NotChecked=0, Total=2070 [2020-11-09 16:21:13,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-09 16:21:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 57. [2020-11-09 16:21:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-11-09 16:21:13,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 137 transitions. [2020-11-09 16:21:13,552 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 137 transitions. Word has length 21 [2020-11-09 16:21:13,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:13,552 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 137 transitions. [2020-11-09 16:21:13,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 16:21:13,552 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 137 transitions. [2020-11-09 16:21:13,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-09 16:21:13,553 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:13,553 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:13,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:13,764 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:13,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:13,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1895992291, now seen corresponding path program 29 times [2020-11-09 16:21:13,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:13,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333475450] [2020-11-09 16:21:13,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:13,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:13,953 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:13,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333475450] [2020-11-09 16:21:13,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615425338] [2020-11-09 16:21:13,954 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 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 [2020-11-09 16:21:14,026 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-09 16:21:14,027 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:14,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-09 16:21:14,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:14,057 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:14,076 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:14,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:14,077 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-09 16:21:14,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1243322793] [2020-11-09 16:21:14,077 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:14,080 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:14,083 INFO L252 McrAutomatonBuilder]: Finished intersection with 28 states and 33 transitions. [2020-11-09 16:21:14,083 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:14,101 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:14,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-09 16:21:14,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:14,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-09 16:21:14,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-09 16:21:14,102 INFO L87 Difference]: Start difference. First operand 57 states and 137 transitions. Second operand 17 states. [2020-11-09 16:21:14,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:14,958 INFO L93 Difference]: Finished difference Result 96 states and 233 transitions. [2020-11-09 16:21:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-09 16:21:14,959 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-11-09 16:21:14,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:14,960 INFO L225 Difference]: With dead ends: 96 [2020-11-09 16:21:14,960 INFO L226 Difference]: Without dead ends: 91 [2020-11-09 16:21:14,961 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=564, Invalid=1242, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 16:21:14,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-09 16:21:14,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 73. [2020-11-09 16:21:14,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 16:21:14,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-11-09 16:21:14,964 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-11-09 16:21:14,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:14,964 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-11-09 16:21:14,964 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-09 16:21:14,964 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-11-09 16:21:14,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 16:21:14,965 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:14,965 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:15,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-11-09 16:21:15,166 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:15,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:15,167 INFO L82 PathProgramCache]: Analyzing trace with hash 1242888800, now seen corresponding path program 30 times [2020-11-09 16:21:15,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:15,168 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999080695] [2020-11-09 16:21:15,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:15,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:15,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999080695] [2020-11-09 16:21:15,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892824332] [2020-11-09 16:21:15,449 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 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 [2020-11-09 16:21:15,528 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-09 16:21:15,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:15,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 16:21:15,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:15,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:15,544 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:15,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:15,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-09 16:21:15,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1331006318] [2020-11-09 16:21:15,545 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:15,548 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:15,553 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 37 transitions. [2020-11-09 16:21:15,553 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:15,555 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:15,555 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:15,603 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:15,604 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:15,624 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:15,624 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:15,650 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [8428#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:21:15,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 16:21:15,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:15,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 16:21:15,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-11-09 16:21:15,652 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 19 states. [2020-11-09 16:21:16,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:16,172 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-11-09 16:21:16,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-09 16:21:16,173 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 16:21:16,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:16,174 INFO L225 Difference]: With dead ends: 96 [2020-11-09 16:21:16,174 INFO L226 Difference]: Without dead ends: 90 [2020-11-09 16:21:16,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 16:21:16,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-09 16:21:16,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 77. [2020-11-09 16:21:16,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 16:21:16,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-11-09 16:21:16,179 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 22 [2020-11-09 16:21:16,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:16,180 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-11-09 16:21:16,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 16:21:16,180 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-11-09 16:21:16,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 16:21:16,180 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:16,180 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:16,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:16,390 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:16,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:16,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1278252686, now seen corresponding path program 31 times [2020-11-09 16:21:16,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:16,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107074341] [2020-11-09 16:21:16,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:16,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:16,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107074341] [2020-11-09 16:21:16,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408008866] [2020-11-09 16:21:16,576 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 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 [2020-11-09 16:21:16,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:16,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 16:21:16,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:16,694 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:16,713 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:16,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:16,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 16:21:16,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [679050621] [2020-11-09 16:21:16,714 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:16,716 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:16,721 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 30 transitions. [2020-11-09 16:21:16,721 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:16,731 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:16,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-09 16:21:16,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:16,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-09 16:21:16,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-09 16:21:16,733 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 18 states. [2020-11-09 16:21:17,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:17,687 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-11-09 16:21:17,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 16:21:17,688 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-11-09 16:21:17,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:17,689 INFO L225 Difference]: With dead ends: 114 [2020-11-09 16:21:17,689 INFO L226 Difference]: Without dead ends: 109 [2020-11-09 16:21:17,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 608 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=716, Invalid=1540, Unknown=0, NotChecked=0, Total=2256 [2020-11-09 16:21:17,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-11-09 16:21:17,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 62. [2020-11-09 16:21:17,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-11-09 16:21:17,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 149 transitions. [2020-11-09 16:21:17,694 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 149 transitions. Word has length 22 [2020-11-09 16:21:17,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:17,695 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 149 transitions. [2020-11-09 16:21:17,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-11-09 16:21:17,695 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 149 transitions. [2020-11-09 16:21:17,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-09 16:21:17,695 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:17,695 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:17,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-11-09 16:21:17,906 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:17,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:17,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1353755908, now seen corresponding path program 32 times [2020-11-09 16:21:17,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:17,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281218948] [2020-11-09 16:21:17,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:17,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:18,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281218948] [2020-11-09 16:21:18,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023459893] [2020-11-09 16:21:18,111 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 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 [2020-11-09 16:21:18,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:21:18,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:18,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-09 16:21:18,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:18,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:18,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:18,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-09 16:21:18,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [876382826] [2020-11-09 16:21:18,236 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:18,239 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:18,244 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 36 transitions. [2020-11-09 16:21:18,245 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:18,280 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9171#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:18,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 16:21:18,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:18,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 16:21:18,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2020-11-09 16:21:18,281 INFO L87 Difference]: Start difference. First operand 62 states and 149 transitions. Second operand 19 states. [2020-11-09 16:21:19,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:19,228 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-11-09 16:21:19,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 16:21:19,229 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-11-09 16:21:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:19,230 INFO L225 Difference]: With dead ends: 122 [2020-11-09 16:21:19,230 INFO L226 Difference]: Without dead ends: 113 [2020-11-09 16:21:19,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=661, Invalid=1501, Unknown=0, NotChecked=0, Total=2162 [2020-11-09 16:21:19,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-09 16:21:19,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 78. [2020-11-09 16:21:19,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-09 16:21:19,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-11-09 16:21:19,236 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 22 [2020-11-09 16:21:19,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:19,236 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-11-09 16:21:19,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 16:21:19,236 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-11-09 16:21:19,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 16:21:19,236 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:19,237 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:19,446 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:19,446 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:19,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:19,447 INFO L82 PathProgramCache]: Analyzing trace with hash -971102387, now seen corresponding path program 33 times [2020-11-09 16:21:19,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:19,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18279829] [2020-11-09 16:21:19,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:19,678 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:19,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18279829] [2020-11-09 16:21:19,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198773198] [2020-11-09 16:21:19,679 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 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 [2020-11-09 16:21:19,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-09 16:21:19,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:19,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 16:21:19,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:19,814 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:19,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:19,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 16:21:19,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1927600971] [2020-11-09 16:21:19,815 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:19,818 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:19,821 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 33 transitions. [2020-11-09 16:21:19,822 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:19,857 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9590#(and (<= ~i~0 17) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:19,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 16:21:19,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:19,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 16:21:19,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-11-09 16:21:19,859 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 20 states. [2020-11-09 16:21:20,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:20,900 INFO L93 Difference]: Finished difference Result 122 states and 289 transitions. [2020-11-09 16:21:20,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 16:21:20,901 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-11-09 16:21:20,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:20,902 INFO L225 Difference]: With dead ends: 122 [2020-11-09 16:21:20,902 INFO L226 Difference]: Without dead ends: 113 [2020-11-09 16:21:20,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=826, Invalid=1826, Unknown=0, NotChecked=0, Total=2652 [2020-11-09 16:21:20,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-11-09 16:21:20,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 61. [2020-11-09 16:21:20,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-11-09 16:21:20,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 147 transitions. [2020-11-09 16:21:20,907 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 147 transitions. Word has length 23 [2020-11-09 16:21:20,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:20,907 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 147 transitions. [2020-11-09 16:21:20,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 16:21:20,907 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 147 transitions. [2020-11-09 16:21:20,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-09 16:21:20,908 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:20,908 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:21,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-11-09 16:21:21,109 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:21,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:21,109 INFO L82 PathProgramCache]: Analyzing trace with hash 983267910, now seen corresponding path program 34 times [2020-11-09 16:21:21,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:21,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514107380] [2020-11-09 16:21:21,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:21,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:21,308 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:21,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514107380] [2020-11-09 16:21:21,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371945990] [2020-11-09 16:21:21,309 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 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 [2020-11-09 16:21:21,383 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:21:21,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:21,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-09 16:21:21,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:21,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:21,443 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:21,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:21,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-09 16:21:21,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [580998558] [2020-11-09 16:21:21,444 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:21,447 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:21,452 INFO L252 McrAutomatonBuilder]: Finished intersection with 30 states and 35 transitions. [2020-11-09 16:21:21,453 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:21,472 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:21,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-09 16:21:21,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:21,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-09 16:21:21,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-09 16:21:21,473 INFO L87 Difference]: Start difference. First operand 61 states and 147 transitions. Second operand 19 states. [2020-11-09 16:21:22,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:22,461 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-11-09 16:21:22,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-09 16:21:22,462 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-11-09 16:21:22,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:22,463 INFO L225 Difference]: With dead ends: 104 [2020-11-09 16:21:22,463 INFO L226 Difference]: Without dead ends: 99 [2020-11-09 16:21:22,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=732, Invalid=1620, Unknown=0, NotChecked=0, Total=2352 [2020-11-09 16:21:22,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-11-09 16:21:22,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 79. [2020-11-09 16:21:22,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-11-09 16:21:22,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-11-09 16:21:22,468 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-11-09 16:21:22,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:22,468 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-11-09 16:21:22,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-09 16:21:22,468 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-11-09 16:21:22,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 16:21:22,468 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:22,469 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:22,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-09 16:21:22,673 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:22,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:22,674 INFO L82 PathProgramCache]: Analyzing trace with hash 415234755, now seen corresponding path program 35 times [2020-11-09 16:21:22,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:22,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717445681] [2020-11-09 16:21:22,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:22,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:22,967 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:22,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717445681] [2020-11-09 16:21:22,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628335342] [2020-11-09 16:21:22,968 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 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 [2020-11-09 16:21:23,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-09 16:21:23,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:23,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 16:21:23,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:23,041 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:23,055 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:23,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:23,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-09 16:21:23,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1389018738] [2020-11-09 16:21:23,056 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:23,059 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:23,064 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 39 transitions. [2020-11-09 16:21:23,065 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:23,066 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:23,066 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:23,098 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:23,099 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:23,126 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:23,126 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:23,149 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [10392#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:21:23,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 16:21:23,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:23,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 16:21:23,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-11-09 16:21:23,150 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 21 states. [2020-11-09 16:21:23,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:23,706 INFO L93 Difference]: Finished difference Result 104 states and 251 transitions. [2020-11-09 16:21:23,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-09 16:21:23,707 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 16:21:23,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:23,708 INFO L225 Difference]: With dead ends: 104 [2020-11-09 16:21:23,708 INFO L226 Difference]: Without dead ends: 98 [2020-11-09 16:21:23,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=460, Invalid=1022, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 16:21:23,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-09 16:21:23,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-11-09 16:21:23,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-11-09 16:21:23,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-11-09 16:21:23,714 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 24 [2020-11-09 16:21:23,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:23,715 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-11-09 16:21:23,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 16:21:23,715 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-11-09 16:21:23,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 16:21:23,715 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:23,716 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:23,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-09 16:21:23,916 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:23,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:23,917 INFO L82 PathProgramCache]: Analyzing trace with hash -39374827, now seen corresponding path program 36 times [2020-11-09 16:21:23,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:23,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869061281] [2020-11-09 16:21:23,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:23,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:24,159 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:24,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869061281] [2020-11-09 16:21:24,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686360978] [2020-11-09 16:21:24,160 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 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 [2020-11-09 16:21:24,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-09 16:21:24,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:24,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 16:21:24,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:24,274 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:24,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:24,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 16:21:24,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [129936075] [2020-11-09 16:21:24,295 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:24,298 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:24,303 INFO L252 McrAutomatonBuilder]: Finished intersection with 29 states and 32 transitions. [2020-11-09 16:21:24,304 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:24,310 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:24,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-09 16:21:24,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:24,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-09 16:21:24,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-09 16:21:24,311 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 20 states. [2020-11-09 16:21:25,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:25,428 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-11-09 16:21:25,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 16:21:25,429 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-11-09 16:21:25,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:25,430 INFO L225 Difference]: With dead ends: 124 [2020-11-09 16:21:25,430 INFO L226 Difference]: Without dead ends: 119 [2020-11-09 16:21:25,432 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=905, Invalid=1957, Unknown=0, NotChecked=0, Total=2862 [2020-11-09 16:21:25,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-09 16:21:25,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 66. [2020-11-09 16:21:25,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-09 16:21:25,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 159 transitions. [2020-11-09 16:21:25,435 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 159 transitions. Word has length 24 [2020-11-09 16:21:25,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:25,435 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 159 transitions. [2020-11-09 16:21:25,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-11-09 16:21:25,435 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 159 transitions. [2020-11-09 16:21:25,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-09 16:21:25,436 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:25,436 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:25,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-09 16:21:25,644 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:25,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:25,645 INFO L82 PathProgramCache]: Analyzing trace with hash 416559353, now seen corresponding path program 37 times [2020-11-09 16:21:25,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:25,647 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229439120] [2020-11-09 16:21:25,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:25,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:25,861 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:25,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229439120] [2020-11-09 16:21:25,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480545435] [2020-11-09 16:21:25,862 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 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 [2020-11-09 16:21:25,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:25,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-09 16:21:25,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:25,971 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:25,994 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:25,995 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:25,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-09 16:21:25,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [254312857] [2020-11-09 16:21:25,995 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:25,998 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:26,004 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 38 transitions. [2020-11-09 16:21:26,004 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:26,037 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11201#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:26,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 16:21:26,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:26,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 16:21:26,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-11-09 16:21:26,038 INFO L87 Difference]: Start difference. First operand 66 states and 159 transitions. Second operand 21 states. [2020-11-09 16:21:27,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:27,156 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-11-09 16:21:27,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 16:21:27,166 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-11-09 16:21:27,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:27,168 INFO L225 Difference]: With dead ends: 132 [2020-11-09 16:21:27,168 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 16:21:27,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 678 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=842, Invalid=1914, Unknown=0, NotChecked=0, Total=2756 [2020-11-09 16:21:27,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 16:21:27,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 84. [2020-11-09 16:21:27,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-09 16:21:27,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-11-09 16:21:27,172 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 24 [2020-11-09 16:21:27,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:27,172 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-11-09 16:21:27,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 16:21:27,172 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-11-09 16:21:27,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 16:21:27,173 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:27,173 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:27,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-09 16:21:27,384 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:27,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:27,384 INFO L82 PathProgramCache]: Analyzing trace with hash -1220594422, now seen corresponding path program 38 times [2020-11-09 16:21:27,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:27,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046464200] [2020-11-09 16:21:27,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:27,615 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:27,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046464200] [2020-11-09 16:21:27,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983569977] [2020-11-09 16:21:27,615 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 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 [2020-11-09 16:21:27,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:21:27,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:27,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 16:21:27,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:27,764 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:27,765 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:27,765 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 16:21:27,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1680410191] [2020-11-09 16:21:27,765 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:27,768 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:27,775 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 35 transitions. [2020-11-09 16:21:27,775 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:27,803 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [11658#(and (<= ~i~0 19) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:27,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 16:21:27,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:27,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 16:21:27,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-11-09 16:21:27,805 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 22 states. [2020-11-09 16:21:29,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:29,024 INFO L93 Difference]: Finished difference Result 132 states and 313 transitions. [2020-11-09 16:21:29,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 16:21:29,025 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-11-09 16:21:29,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:29,026 INFO L225 Difference]: With dead ends: 132 [2020-11-09 16:21:29,026 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 16:21:29,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 907 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1028, Invalid=2278, Unknown=0, NotChecked=0, Total=3306 [2020-11-09 16:21:29,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 16:21:29,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 65. [2020-11-09 16:21:29,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-09 16:21:29,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 157 transitions. [2020-11-09 16:21:29,031 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 157 transitions. Word has length 25 [2020-11-09 16:21:29,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:29,031 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 157 transitions. [2020-11-09 16:21:29,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 16:21:29,031 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 157 transitions. [2020-11-09 16:21:29,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-09 16:21:29,032 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:29,032 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:29,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-09 16:21:29,233 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:29,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:29,233 INFO L82 PathProgramCache]: Analyzing trace with hash 28466153, now seen corresponding path program 39 times [2020-11-09 16:21:29,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:29,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723817846] [2020-11-09 16:21:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:29,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:29,496 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:29,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723817846] [2020-11-09 16:21:29,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221371023] [2020-11-09 16:21:29,497 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 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 [2020-11-09 16:21:29,588 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-09 16:21:29,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:29,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-09 16:21:29,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:29,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:29,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:29,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-09 16:21:29,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [759650948] [2020-11-09 16:21:29,658 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:29,662 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:29,669 INFO L252 McrAutomatonBuilder]: Finished intersection with 32 states and 37 transitions. [2020-11-09 16:21:29,669 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:29,686 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:29,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-09 16:21:29,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:29,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-09 16:21:29,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-09 16:21:29,687 INFO L87 Difference]: Start difference. First operand 65 states and 157 transitions. Second operand 21 states. [2020-11-09 16:21:30,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:30,873 INFO L93 Difference]: Finished difference Result 112 states and 273 transitions. [2020-11-09 16:21:30,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-09 16:21:30,874 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-11-09 16:21:30,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:30,876 INFO L225 Difference]: With dead ends: 112 [2020-11-09 16:21:30,876 INFO L226 Difference]: Without dead ends: 107 [2020-11-09 16:21:30,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=922, Invalid=2048, Unknown=0, NotChecked=0, Total=2970 [2020-11-09 16:21:30,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-11-09 16:21:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 85. [2020-11-09 16:21:30,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 16:21:30,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-11-09 16:21:30,880 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-11-09 16:21:30,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:30,881 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-11-09 16:21:30,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-09 16:21:30,881 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-11-09 16:21:30,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 16:21:30,881 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:30,881 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:31,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-09 16:21:31,082 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:31,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:31,083 INFO L82 PathProgramCache]: Analyzing trace with hash -391352730, now seen corresponding path program 40 times [2020-11-09 16:21:31,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:31,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247223987] [2020-11-09 16:21:31,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:31,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:31,434 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:31,434 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247223987] [2020-11-09 16:21:31,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945552299] [2020-11-09 16:21:31,435 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 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 [2020-11-09 16:21:31,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:21:31,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:31,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 16:21:31,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:31,525 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:31,540 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:31,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:31,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-09 16:21:31,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [816956199] [2020-11-09 16:21:31,541 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:31,544 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:31,551 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 41 transitions. [2020-11-09 16:21:31,551 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:31,561 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:31,562 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:31,593 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:31,593 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:31,617 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:31,618 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:31,640 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12530#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:21:31,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 16:21:31,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:31,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 16:21:31,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-11-09 16:21:31,642 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 23 states. [2020-11-09 16:21:32,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:32,298 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-11-09 16:21:32,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-11-09 16:21:32,299 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 16:21:32,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:32,300 INFO L225 Difference]: With dead ends: 112 [2020-11-09 16:21:32,300 INFO L226 Difference]: Without dead ends: 106 [2020-11-09 16:21:32,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1246, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 16:21:32,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-09 16:21:32,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 89. [2020-11-09 16:21:32,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 16:21:32,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-11-09 16:21:32,305 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 26 [2020-11-09 16:21:32,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:32,305 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-11-09 16:21:32,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 16:21:32,306 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-11-09 16:21:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 16:21:32,306 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:32,306 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:32,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:32,517 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:32,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:32,517 INFO L82 PathProgramCache]: Analyzing trace with hash 816306680, now seen corresponding path program 41 times [2020-11-09 16:21:32,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:32,519 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [118691395] [2020-11-09 16:21:32,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:32,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:32,791 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:32,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [118691395] [2020-11-09 16:21:32,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397900794] [2020-11-09 16:21:32,792 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 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 [2020-11-09 16:21:32,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-09 16:21:32,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:32,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-09 16:21:32,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:32,911 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:32,931 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:32,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:32,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 16:21:32,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1574422558] [2020-11-09 16:21:32,932 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:32,935 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:32,940 INFO L252 McrAutomatonBuilder]: Finished intersection with 31 states and 34 transitions. [2020-11-09 16:21:32,940 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:32,944 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:32,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-09 16:21:32,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:32,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-09 16:21:32,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-09 16:21:32,945 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 22 states. [2020-11-09 16:21:34,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:34,231 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-11-09 16:21:34,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 16:21:34,232 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-11-09 16:21:34,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:34,234 INFO L225 Difference]: With dead ends: 134 [2020-11-09 16:21:34,234 INFO L226 Difference]: Without dead ends: 129 [2020-11-09 16:21:34,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1116, Invalid=2424, Unknown=0, NotChecked=0, Total=3540 [2020-11-09 16:21:34,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-11-09 16:21:34,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 70. [2020-11-09 16:21:34,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-11-09 16:21:34,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 169 transitions. [2020-11-09 16:21:34,240 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 169 transitions. Word has length 26 [2020-11-09 16:21:34,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:34,240 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 169 transitions. [2020-11-09 16:21:34,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-11-09 16:21:34,240 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 169 transitions. [2020-11-09 16:21:34,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-09 16:21:34,240 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:34,241 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:34,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:34,445 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:34,445 INFO L82 PathProgramCache]: Analyzing trace with hash 882475958, now seen corresponding path program 42 times [2020-11-09 16:21:34,447 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:34,447 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013138036] [2020-11-09 16:21:34,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:34,718 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:34,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013138036] [2020-11-09 16:21:34,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337252639] [2020-11-09 16:21:34,718 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 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 [2020-11-09 16:21:34,795 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-09 16:21:34,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:34,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 16:21:34,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:34,859 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:34,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:34,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-09 16:21:34,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [787054485] [2020-11-09 16:21:34,860 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:34,864 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:34,870 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 40 transitions. [2020-11-09 16:21:34,871 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:34,911 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13405#(and (<= ~i~0 23) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:34,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 16:21:34,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:34,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 16:21:34,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-11-09 16:21:34,913 INFO L87 Difference]: Start difference. First operand 70 states and 169 transitions. Second operand 23 states. [2020-11-09 16:21:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:36,270 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-11-09 16:21:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 16:21:36,270 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-11-09 16:21:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:36,272 INFO L225 Difference]: With dead ends: 142 [2020-11-09 16:21:36,272 INFO L226 Difference]: Without dead ends: 133 [2020-11-09 16:21:36,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1045, Invalid=2377, Unknown=0, NotChecked=0, Total=3422 [2020-11-09 16:21:36,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-09 16:21:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2020-11-09 16:21:36,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-09 16:21:36,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 229 transitions. [2020-11-09 16:21:36,276 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 229 transitions. Word has length 26 [2020-11-09 16:21:36,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:36,276 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 229 transitions. [2020-11-09 16:21:36,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 16:21:36,277 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 229 transitions. [2020-11-09 16:21:36,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 16:21:36,277 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:36,277 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:36,478 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:36,479 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:36,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:36,480 INFO L82 PathProgramCache]: Analyzing trace with hash -464271481, now seen corresponding path program 43 times [2020-11-09 16:21:36,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:36,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389918370] [2020-11-09 16:21:36,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:36,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:36,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389918370] [2020-11-09 16:21:36,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33511108] [2020-11-09 16:21:36,778 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 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 [2020-11-09 16:21:36,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:36,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 16:21:36,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:36,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:36,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:36,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 16:21:36,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1217750397] [2020-11-09 16:21:36,912 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:36,915 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:36,920 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 37 transitions. [2020-11-09 16:21:36,920 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:36,959 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [13900#(and (<= ~i~0 21) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:36,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 16:21:36,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:36,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 16:21:36,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-11-09 16:21:36,961 INFO L87 Difference]: Start difference. First operand 90 states and 229 transitions. Second operand 24 states. [2020-11-09 16:21:38,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:38,410 INFO L93 Difference]: Finished difference Result 142 states and 337 transitions. [2020-11-09 16:21:38,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 16:21:38,411 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-11-09 16:21:38,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:38,412 INFO L225 Difference]: With dead ends: 142 [2020-11-09 16:21:38,412 INFO L226 Difference]: Without dead ends: 133 [2020-11-09 16:21:38,413 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1124 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1252, Invalid=2780, Unknown=0, NotChecked=0, Total=4032 [2020-11-09 16:21:38,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-11-09 16:21:38,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 69. [2020-11-09 16:21:38,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-11-09 16:21:38,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 167 transitions. [2020-11-09 16:21:38,417 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 167 transitions. Word has length 27 [2020-11-09 16:21:38,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:38,417 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 167 transitions. [2020-11-09 16:21:38,417 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 16:21:38,418 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 167 transitions. [2020-11-09 16:21:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-09 16:21:38,418 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:38,418 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:38,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-11-09 16:21:38,629 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:38,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:38,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1586979020, now seen corresponding path program 44 times [2020-11-09 16:21:38,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:38,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869755163] [2020-11-09 16:21:38,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:38,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:38,930 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:38,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869755163] [2020-11-09 16:21:38,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1826051000] [2020-11-09 16:21:38,931 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 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 [2020-11-09 16:21:39,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:21:39,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:39,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-09 16:21:39,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:39,062 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:39,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:39,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-09 16:21:39,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [881100013] [2020-11-09 16:21:39,087 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:39,091 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:39,098 INFO L252 McrAutomatonBuilder]: Finished intersection with 34 states and 39 transitions. [2020-11-09 16:21:39,098 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:39,116 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:39,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-09 16:21:39,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:39,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-09 16:21:39,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-11-09 16:21:39,117 INFO L87 Difference]: Start difference. First operand 69 states and 167 transitions. Second operand 23 states. [2020-11-09 16:21:40,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:40,551 INFO L93 Difference]: Finished difference Result 120 states and 293 transitions. [2020-11-09 16:21:40,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-09 16:21:40,551 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-11-09 16:21:40,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:40,553 INFO L225 Difference]: With dead ends: 120 [2020-11-09 16:21:40,553 INFO L226 Difference]: Without dead ends: 115 [2020-11-09 16:21:40,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1134, Invalid=2526, Unknown=0, NotChecked=0, Total=3660 [2020-11-09 16:21:40,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-11-09 16:21:40,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 91. [2020-11-09 16:21:40,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-11-09 16:21:40,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-11-09 16:21:40,557 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-11-09 16:21:40,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:40,558 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-11-09 16:21:40,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-09 16:21:40,558 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-11-09 16:21:40,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 16:21:40,558 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:40,559 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:40,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:40,771 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:40,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:40,771 INFO L82 PathProgramCache]: Analyzing trace with hash 1867154761, now seen corresponding path program 45 times [2020-11-09 16:21:40,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:40,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888572940] [2020-11-09 16:21:40,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:40,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:41,229 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:41,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888572940] [2020-11-09 16:21:41,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185847438] [2020-11-09 16:21:41,229 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 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 [2020-11-09 16:21:41,322 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-09 16:21:41,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:41,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 16:21:41,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:41,327 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:41,342 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:41,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:41,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-09 16:21:41,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [873589174] [2020-11-09 16:21:41,342 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:41,346 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:41,354 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 43 transitions. [2020-11-09 16:21:41,354 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:41,366 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:41,366 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:41,405 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:41,405 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:41,436 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:41,437 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:41,459 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14842#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:21:41,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 16:21:41,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:41,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 16:21:41,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=452, Unknown=0, NotChecked=0, Total=600 [2020-11-09 16:21:41,460 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 25 states. [2020-11-09 16:21:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:42,248 INFO L93 Difference]: Finished difference Result 120 states and 291 transitions. [2020-11-09 16:21:42,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-09 16:21:42,249 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-09 16:21:42,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:42,250 INFO L225 Difference]: With dead ends: 120 [2020-11-09 16:21:42,250 INFO L226 Difference]: Without dead ends: 114 [2020-11-09 16:21:42,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=670, Invalid=1492, Unknown=0, NotChecked=0, Total=2162 [2020-11-09 16:21:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-11-09 16:21:42,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 95. [2020-11-09 16:21:42,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-11-09 16:21:42,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 241 transitions. [2020-11-09 16:21:42,254 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 241 transitions. Word has length 28 [2020-11-09 16:21:42,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:42,254 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 241 transitions. [2020-11-09 16:21:42,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 16:21:42,254 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 241 transitions. [2020-11-09 16:21:42,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 16:21:42,255 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:42,255 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:42,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:42,465 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:42,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:42,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1507485925, now seen corresponding path program 46 times [2020-11-09 16:21:42,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:42,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209877909] [2020-11-09 16:21:42,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:42,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:42,775 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:42,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209877909] [2020-11-09 16:21:42,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741797668] [2020-11-09 16:21:42,776 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 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 [2020-11-09 16:21:42,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:21:42,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:42,852 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-09 16:21:42,853 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:42,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:42,924 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:42,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:42,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 16:21:42,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1222370942] [2020-11-09 16:21:42,925 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:42,929 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:42,935 INFO L252 McrAutomatonBuilder]: Finished intersection with 33 states and 36 transitions. [2020-11-09 16:21:42,935 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:42,943 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:42,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-09 16:21:42,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:42,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-09 16:21:42,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-11-09 16:21:42,945 INFO L87 Difference]: Start difference. First operand 95 states and 241 transitions. Second operand 24 states. [2020-11-09 16:21:44,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:44,513 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-11-09 16:21:44,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-09 16:21:44,514 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-11-09 16:21:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:44,515 INFO L225 Difference]: With dead ends: 144 [2020-11-09 16:21:44,516 INFO L226 Difference]: Without dead ends: 139 [2020-11-09 16:21:44,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1220 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1349, Invalid=2941, Unknown=0, NotChecked=0, Total=4290 [2020-11-09 16:21:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-09 16:21:44,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 74. [2020-11-09 16:21:44,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-11-09 16:21:44,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-11-09 16:21:44,519 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 28 [2020-11-09 16:21:44,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:44,519 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-11-09 16:21:44,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-11-09 16:21:44,519 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-11-09 16:21:44,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-09 16:21:44,520 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:44,520 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:44,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-09 16:21:44,721 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:44,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:44,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1951734579, now seen corresponding path program 47 times [2020-11-09 16:21:44,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:44,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764165785] [2020-11-09 16:21:44,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:45,058 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:45,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764165785] [2020-11-09 16:21:45,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1991565847] [2020-11-09 16:21:45,059 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 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 [2020-11-09 16:21:45,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-09 16:21:45,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:45,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-09 16:21:45,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:45,169 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:45,189 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:45,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:45,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-09 16:21:45,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1711899229] [2020-11-09 16:21:45,190 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:45,193 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:45,199 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 42 transitions. [2020-11-09 16:21:45,199 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:45,235 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [15783#(and (<= ~i~0 25) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:45,235 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 16:21:45,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:45,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 16:21:45,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-11-09 16:21:45,236 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 25 states. [2020-11-09 16:21:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:46,789 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-11-09 16:21:46,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 16:21:46,790 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-11-09 16:21:46,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:46,791 INFO L225 Difference]: With dead ends: 152 [2020-11-09 16:21:46,791 INFO L226 Difference]: Without dead ends: 143 [2020-11-09 16:21:46,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1068 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1270, Invalid=2890, Unknown=0, NotChecked=0, Total=4160 [2020-11-09 16:21:46,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-09 16:21:46,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 96. [2020-11-09 16:21:46,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-09 16:21:46,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 245 transitions. [2020-11-09 16:21:46,796 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 245 transitions. Word has length 28 [2020-11-09 16:21:46,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:46,797 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 245 transitions. [2020-11-09 16:21:46,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 16:21:46,797 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 245 transitions. [2020-11-09 16:21:46,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-09 16:21:46,797 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:46,797 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:47,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-09 16:21:47,008 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:47,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:47,008 INFO L82 PathProgramCache]: Analyzing trace with hash 512601796, now seen corresponding path program 48 times [2020-11-09 16:21:47,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:47,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131414828] [2020-11-09 16:21:47,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:47,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131414828] [2020-11-09 16:21:47,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628816358] [2020-11-09 16:21:47,346 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 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 [2020-11-09 16:21:47,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2020-11-09 16:21:47,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:47,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-09 16:21:47,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:47,494 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:47,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:47,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-09 16:21:47,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1109954468] [2020-11-09 16:21:47,495 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:47,499 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:47,508 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 39 transitions. [2020-11-09 16:21:47,508 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:47,543 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16316#(and (<= ~i~0 23) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:47,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-09 16:21:47,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:47,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-09 16:21:47,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=547, Unknown=0, NotChecked=0, Total=702 [2020-11-09 16:21:47,545 INFO L87 Difference]: Start difference. First operand 96 states and 245 transitions. Second operand 26 states. [2020-11-09 16:21:49,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:49,252 INFO L93 Difference]: Finished difference Result 152 states and 361 transitions. [2020-11-09 16:21:49,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-09 16:21:49,253 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 29 [2020-11-09 16:21:49,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:49,254 INFO L225 Difference]: With dead ends: 152 [2020-11-09 16:21:49,254 INFO L226 Difference]: Without dead ends: 143 [2020-11-09 16:21:49,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1363 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1498, Invalid=3332, Unknown=0, NotChecked=0, Total=4830 [2020-11-09 16:21:49,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-11-09 16:21:49,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 73. [2020-11-09 16:21:49,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-11-09 16:21:49,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 177 transitions. [2020-11-09 16:21:49,258 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 177 transitions. Word has length 29 [2020-11-09 16:21:49,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:49,258 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 177 transitions. [2020-11-09 16:21:49,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-09 16:21:49,259 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 177 transitions. [2020-11-09 16:21:49,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-09 16:21:49,259 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:49,259 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:49,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-09 16:21:49,474 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:49,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:49,475 INFO L82 PathProgramCache]: Analyzing trace with hash 374257903, now seen corresponding path program 49 times [2020-11-09 16:21:49,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:49,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207046157] [2020-11-09 16:21:49,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:49,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:49,819 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:49,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207046157] [2020-11-09 16:21:49,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87285113] [2020-11-09 16:21:49,819 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 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 [2020-11-09 16:21:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:49,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 25 conjunts are in the unsatisfiable core [2020-11-09 16:21:49,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:49,935 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:49,963 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:49,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:49,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2020-11-09 16:21:49,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [694088428] [2020-11-09 16:21:49,964 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:49,968 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:49,974 INFO L252 McrAutomatonBuilder]: Finished intersection with 36 states and 41 transitions. [2020-11-09 16:21:49,974 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:49,994 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:49,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-09 16:21:49,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:49,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-09 16:21:49,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=497, Unknown=0, NotChecked=0, Total=650 [2020-11-09 16:21:49,995 INFO L87 Difference]: Start difference. First operand 73 states and 177 transitions. Second operand 25 states. [2020-11-09 16:21:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:51,678 INFO L93 Difference]: Finished difference Result 128 states and 313 transitions. [2020-11-09 16:21:51,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-09 16:21:51,679 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 29 [2020-11-09 16:21:51,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:51,680 INFO L225 Difference]: With dead ends: 128 [2020-11-09 16:21:51,681 INFO L226 Difference]: Without dead ends: 123 [2020-11-09 16:21:51,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1157 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1368, Invalid=3054, Unknown=0, NotChecked=0, Total=4422 [2020-11-09 16:21:51,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-11-09 16:21:51,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 97. [2020-11-09 16:21:51,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-09 16:21:51,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 249 transitions. [2020-11-09 16:21:51,685 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 249 transitions. Word has length 29 [2020-11-09 16:21:51,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:51,685 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 249 transitions. [2020-11-09 16:21:51,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-09 16:21:51,685 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 249 transitions. [2020-11-09 16:21:51,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 16:21:51,686 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:51,686 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:51,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:51,898 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:51,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:51,898 INFO L82 PathProgramCache]: Analyzing trace with hash -960598164, now seen corresponding path program 50 times [2020-11-09 16:21:51,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:51,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906203872] [2020-11-09 16:21:51,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:51,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:52,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906203872] [2020-11-09 16:21:52,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016707253] [2020-11-09 16:21:52,427 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 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 [2020-11-09 16:21:52,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:21:52,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:52,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 16:21:52,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:52,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:52,534 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:52,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:52,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2020-11-09 16:21:52,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [600544903] [2020-11-09 16:21:52,535 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:52,540 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:52,549 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 45 transitions. [2020-11-09 16:21:52,549 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:52,552 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:52,552 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:52,587 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:52,587 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:52,616 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:21:52,616 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:21:52,646 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [17328#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:21:52,647 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 16:21:52,647 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:52,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 16:21:52,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=529, Unknown=0, NotChecked=0, Total=702 [2020-11-09 16:21:52,648 INFO L87 Difference]: Start difference. First operand 97 states and 249 transitions. Second operand 27 states. [2020-11-09 16:21:53,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:53,584 INFO L93 Difference]: Finished difference Result 128 states and 311 transitions. [2020-11-09 16:21:53,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-09 16:21:53,585 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-11-09 16:21:53,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:53,586 INFO L225 Difference]: With dead ends: 128 [2020-11-09 16:21:53,586 INFO L226 Difference]: Without dead ends: 122 [2020-11-09 16:21:53,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 449 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=790, Invalid=1760, Unknown=0, NotChecked=0, Total=2550 [2020-11-09 16:21:53,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-11-09 16:21:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 101. [2020-11-09 16:21:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-09 16:21:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 257 transitions. [2020-11-09 16:21:53,591 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 257 transitions. Word has length 30 [2020-11-09 16:21:53,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:53,592 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 257 transitions. [2020-11-09 16:21:53,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 16:21:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 257 transitions. [2020-11-09 16:21:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 16:21:53,592 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:53,592 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:53,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:53,796 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:53,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:53,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1289185410, now seen corresponding path program 51 times [2020-11-09 16:21:53,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:53,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411693200] [2020-11-09 16:21:53,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:53,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:54,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411693200] [2020-11-09 16:21:54,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985968338] [2020-11-09 16:21:54,194 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 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 [2020-11-09 16:21:54,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2020-11-09 16:21:54,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:54,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-09 16:21:54,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:54,315 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:21:54,345 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:54,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:54,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-09 16:21:54,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [30319648] [2020-11-09 16:21:54,346 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:54,350 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:54,356 INFO L252 McrAutomatonBuilder]: Finished intersection with 35 states and 38 transitions. [2020-11-09 16:21:54,356 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:54,362 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:21:54,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-11-09 16:21:54,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:54,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-11-09 16:21:54,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=537, Unknown=0, NotChecked=0, Total=702 [2020-11-09 16:21:54,364 INFO L87 Difference]: Start difference. First operand 101 states and 257 transitions. Second operand 26 states. [2020-11-09 16:21:56,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:56,184 INFO L93 Difference]: Finished difference Result 154 states and 367 transitions. [2020-11-09 16:21:56,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-09 16:21:56,191 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 30 [2020-11-09 16:21:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:56,192 INFO L225 Difference]: With dead ends: 154 [2020-11-09 16:21:56,192 INFO L226 Difference]: Without dead ends: 149 [2020-11-09 16:21:56,193 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1468 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1604, Invalid=3508, Unknown=0, NotChecked=0, Total=5112 [2020-11-09 16:21:56,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-11-09 16:21:56,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 78. [2020-11-09 16:21:56,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-09 16:21:56,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 189 transitions. [2020-11-09 16:21:56,196 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 189 transitions. Word has length 30 [2020-11-09 16:21:56,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:56,196 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 189 transitions. [2020-11-09 16:21:56,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-11-09 16:21:56,196 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 189 transitions. [2020-11-09 16:21:56,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-11-09 16:21:56,197 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:56,197 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:56,397 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-11-09 16:21:56,398 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:56,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:56,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1282881680, now seen corresponding path program 52 times [2020-11-09 16:21:56,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:56,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971332879] [2020-11-09 16:21:56,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:56,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:56,797 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:56,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971332879] [2020-11-09 16:21:56,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907065202] [2020-11-09 16:21:56,798 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 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 [2020-11-09 16:21:56,879 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:21:56,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:56,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 26 conjunts are in the unsatisfiable core [2020-11-09 16:21:56,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:56,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:56,960 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:56,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:56,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2020-11-09 16:21:56,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1793926946] [2020-11-09 16:21:56,961 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:56,966 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:56,973 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 44 transitions. [2020-11-09 16:21:56,974 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:57,027 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18335#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 27))] [2020-11-09 16:21:57,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 16:21:57,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:57,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 16:21:57,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=589, Unknown=0, NotChecked=0, Total=756 [2020-11-09 16:21:57,028 INFO L87 Difference]: Start difference. First operand 78 states and 189 transitions. Second operand 27 states. [2020-11-09 16:21:58,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:21:58,944 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-11-09 16:21:58,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-11-09 16:21:58,944 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 30 [2020-11-09 16:21:58,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:21:58,946 INFO L225 Difference]: With dead ends: 162 [2020-11-09 16:21:58,946 INFO L226 Difference]: Without dead ends: 153 [2020-11-09 16:21:58,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1517, Invalid=3453, Unknown=0, NotChecked=0, Total=4970 [2020-11-09 16:21:58,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-09 16:21:58,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 102. [2020-11-09 16:21:58,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-09 16:21:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 261 transitions. [2020-11-09 16:21:58,951 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 261 transitions. Word has length 30 [2020-11-09 16:21:58,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:21:58,951 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 261 transitions. [2020-11-09 16:21:58,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 16:21:58,951 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 261 transitions. [2020-11-09 16:21:58,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-09 16:21:58,952 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:21:58,952 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:21:59,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:21:59,164 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:21:59,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:21:59,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1310016831, now seen corresponding path program 53 times [2020-11-09 16:21:59,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:21:59,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869270013] [2020-11-09 16:21:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:21:59,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:21:59,598 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:59,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869270013] [2020-11-09 16:21:59,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374296768] [2020-11-09 16:21:59,599 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 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 [2020-11-09 16:21:59,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2020-11-09 16:21:59,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:21:59,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 16:21:59,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:21:59,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:21:59,753 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:21:59,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:21:59,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-09 16:21:59,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1131113000] [2020-11-09 16:21:59,755 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:21:59,759 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:21:59,768 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 41 transitions. [2020-11-09 16:21:59,768 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:21:59,804 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18906#(and (<= ~i~0 25) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:21:59,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-09 16:21:59,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:21:59,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-09 16:21:59,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=632, Unknown=0, NotChecked=0, Total=812 [2020-11-09 16:21:59,806 INFO L87 Difference]: Start difference. First operand 102 states and 261 transitions. Second operand 28 states. [2020-11-09 16:22:01,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:01,850 INFO L93 Difference]: Finished difference Result 162 states and 385 transitions. [2020-11-09 16:22:01,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-09 16:22:01,851 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 31 [2020-11-09 16:22:01,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:01,852 INFO L225 Difference]: With dead ends: 162 [2020-11-09 16:22:01,852 INFO L226 Difference]: Without dead ends: 153 [2020-11-09 16:22:01,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1766, Invalid=3934, Unknown=0, NotChecked=0, Total=5700 [2020-11-09 16:22:01,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-11-09 16:22:01,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 77. [2020-11-09 16:22:01,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-11-09 16:22:01,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 187 transitions. [2020-11-09 16:22:01,856 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 187 transitions. Word has length 31 [2020-11-09 16:22:01,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:01,856 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 187 transitions. [2020-11-09 16:22:01,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-09 16:22:01,857 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 187 transitions. [2020-11-09 16:22:01,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-11-09 16:22:01,857 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:01,857 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:02,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-11-09 16:22:02,059 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:02,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:02,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1114598318, now seen corresponding path program 54 times [2020-11-09 16:22:02,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:02,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473910537] [2020-11-09 16:22:02,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:02,464 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:02,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473910537] [2020-11-09 16:22:02,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76253316] [2020-11-09 16:22:02,465 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 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 [2020-11-09 16:22:02,562 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2020-11-09 16:22:02,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:02,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 193 conjuncts, 27 conjunts are in the unsatisfiable core [2020-11-09 16:22:02,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:02,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:02,632 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:02,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:02,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2020-11-09 16:22:02,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1858448774] [2020-11-09 16:22:02,633 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:02,638 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:02,648 INFO L252 McrAutomatonBuilder]: Finished intersection with 38 states and 43 transitions. [2020-11-09 16:22:02,648 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:02,660 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:02,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-09 16:22:02,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:02,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-09 16:22:02,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=578, Unknown=0, NotChecked=0, Total=756 [2020-11-09 16:22:02,661 INFO L87 Difference]: Start difference. First operand 77 states and 187 transitions. Second operand 27 states. [2020-11-09 16:22:04,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:04,663 INFO L93 Difference]: Finished difference Result 136 states and 333 transitions. [2020-11-09 16:22:04,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-09 16:22:04,664 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 31 [2020-11-09 16:22:04,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:04,666 INFO L225 Difference]: With dead ends: 136 [2020-11-09 16:22:04,666 INFO L226 Difference]: Without dead ends: 131 [2020-11-09 16:22:04,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1624, Invalid=3632, Unknown=0, NotChecked=0, Total=5256 [2020-11-09 16:22:04,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-11-09 16:22:04,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 103. [2020-11-09 16:22:04,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-11-09 16:22:04,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 265 transitions. [2020-11-09 16:22:04,671 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 265 transitions. Word has length 31 [2020-11-09 16:22:04,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:04,671 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 265 transitions. [2020-11-09 16:22:04,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-09 16:22:04,671 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 265 transitions. [2020-11-09 16:22:04,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 16:22:04,672 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:04,672 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:04,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-09 16:22:04,883 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:04,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:04,883 INFO L82 PathProgramCache]: Analyzing trace with hash 283139279, now seen corresponding path program 55 times [2020-11-09 16:22:04,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:04,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024574959] [2020-11-09 16:22:04,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:04,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:05,548 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:05,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024574959] [2020-11-09 16:22:05,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048351616] [2020-11-09 16:22:05,549 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 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 [2020-11-09 16:22:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:05,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 16:22:05,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:05,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:05,653 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:05,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:05,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2020-11-09 16:22:05,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [714005046] [2020-11-09 16:22:05,654 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:05,660 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:05,673 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 47 transitions. [2020-11-09 16:22:05,673 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:05,684 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:05,684 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:05,729 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:05,729 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:05,759 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:05,760 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:05,792 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [19988#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:22:05,793 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 16:22:05,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:05,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 16:22:05,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=612, Unknown=0, NotChecked=0, Total=812 [2020-11-09 16:22:05,794 INFO L87 Difference]: Start difference. First operand 103 states and 265 transitions. Second operand 29 states. [2020-11-09 16:22:06,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:06,897 INFO L93 Difference]: Finished difference Result 136 states and 331 transitions. [2020-11-09 16:22:06,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-09 16:22:06,898 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-11-09 16:22:06,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:06,900 INFO L225 Difference]: With dead ends: 136 [2020-11-09 16:22:06,900 INFO L226 Difference]: Without dead ends: 130 [2020-11-09 16:22:06,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=920, Invalid=2050, Unknown=0, NotChecked=0, Total=2970 [2020-11-09 16:22:06,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-09 16:22:06,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 107. [2020-11-09 16:22:06,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-11-09 16:22:06,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 273 transitions. [2020-11-09 16:22:06,903 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 273 transitions. Word has length 32 [2020-11-09 16:22:06,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:06,903 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 273 transitions. [2020-11-09 16:22:06,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 16:22:06,903 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 273 transitions. [2020-11-09 16:22:06,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 16:22:06,904 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:06,904 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:07,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-09 16:22:07,105 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:07,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:07,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1955787999, now seen corresponding path program 56 times [2020-11-09 16:22:07,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:07,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705899532] [2020-11-09 16:22:07,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:07,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:07,530 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:07,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705899532] [2020-11-09 16:22:07,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320754757] [2020-11-09 16:22:07,530 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 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 [2020-11-09 16:22:07,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:22:07,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:07,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-09 16:22:07,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:07,680 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:07,709 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:07,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:07,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-09 16:22:07,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1393748627] [2020-11-09 16:22:07,710 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:07,716 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:07,727 INFO L252 McrAutomatonBuilder]: Finished intersection with 37 states and 40 transitions. [2020-11-09 16:22:07,728 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:07,736 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:07,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-11-09 16:22:07,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:07,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-11-09 16:22:07,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=621, Unknown=0, NotChecked=0, Total=812 [2020-11-09 16:22:07,737 INFO L87 Difference]: Start difference. First operand 107 states and 273 transitions. Second operand 28 states. [2020-11-09 16:22:09,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:09,861 INFO L93 Difference]: Finished difference Result 164 states and 391 transitions. [2020-11-09 16:22:09,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-09 16:22:09,862 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 32 [2020-11-09 16:22:09,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:09,864 INFO L225 Difference]: With dead ends: 164 [2020-11-09 16:22:09,864 INFO L226 Difference]: Without dead ends: 159 [2020-11-09 16:22:09,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1881, Invalid=4125, Unknown=0, NotChecked=0, Total=6006 [2020-11-09 16:22:09,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-11-09 16:22:09,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 82. [2020-11-09 16:22:09,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-11-09 16:22:09,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 199 transitions. [2020-11-09 16:22:09,868 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 199 transitions. Word has length 32 [2020-11-09 16:22:09,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:09,868 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 199 transitions. [2020-11-09 16:22:09,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-11-09 16:22:09,868 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 199 transitions. [2020-11-09 16:22:09,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-11-09 16:22:09,869 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:09,869 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:10,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-09 16:22:10,081 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:10,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:10,081 INFO L82 PathProgramCache]: Analyzing trace with hash -192784275, now seen corresponding path program 57 times [2020-11-09 16:22:10,083 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:10,083 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181377470] [2020-11-09 16:22:10,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:10,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:10,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181377470] [2020-11-09 16:22:10,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399733568] [2020-11-09 16:22:10,505 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 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 [2020-11-09 16:22:10,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2020-11-09 16:22:10,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:10,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 28 conjunts are in the unsatisfiable core [2020-11-09 16:22:10,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:10,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:22:10,665 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:10,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:10,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2020-11-09 16:22:10,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1305635082] [2020-11-09 16:22:10,666 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:10,670 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:10,678 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 46 transitions. [2020-11-09 16:22:10,678 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:10,729 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21061#(and (<= ~i~0 29) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:22:10,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 16:22:10,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:10,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 16:22:10,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=677, Unknown=0, NotChecked=0, Total=870 [2020-11-09 16:22:10,731 INFO L87 Difference]: Start difference. First operand 82 states and 199 transitions. Second operand 29 states. [2020-11-09 16:22:12,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:12,928 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-11-09 16:22:12,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-09 16:22:12,929 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 32 [2020-11-09 16:22:12,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:12,930 INFO L225 Difference]: With dead ends: 172 [2020-11-09 16:22:12,931 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 16:22:12,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1546 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1786, Invalid=4066, Unknown=0, NotChecked=0, Total=5852 [2020-11-09 16:22:12,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 16:22:12,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 108. [2020-11-09 16:22:12,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-09 16:22:12,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 277 transitions. [2020-11-09 16:22:12,936 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 277 transitions. Word has length 32 [2020-11-09 16:22:12,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:12,937 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 277 transitions. [2020-11-09 16:22:12,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 16:22:12,937 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 277 transitions. [2020-11-09 16:22:12,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-09 16:22:12,937 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:12,938 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:13,148 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:13,149 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:13,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:13,149 INFO L82 PathProgramCache]: Analyzing trace with hash -499860610, now seen corresponding path program 58 times [2020-11-09 16:22:13,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:13,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344214887] [2020-11-09 16:22:13,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:13,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:13,693 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:13,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344214887] [2020-11-09 16:22:13,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236440045] [2020-11-09 16:22:13,693 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 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 [2020-11-09 16:22:13,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:22:13,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:13,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 16:22:13,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:13,888 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:22:13,929 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:13,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:13,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-09 16:22:13,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1650439677] [2020-11-09 16:22:13,930 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:13,935 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:13,946 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 43 transitions. [2020-11-09 16:22:13,947 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:13,988 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [21670#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 27))] [2020-11-09 16:22:13,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-09 16:22:13,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:13,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-09 16:22:13,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=723, Unknown=0, NotChecked=0, Total=930 [2020-11-09 16:22:13,989 INFO L87 Difference]: Start difference. First operand 108 states and 277 transitions. Second operand 30 states. [2020-11-09 16:22:16,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:16,296 INFO L93 Difference]: Finished difference Result 172 states and 409 transitions. [2020-11-09 16:22:16,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-09 16:22:16,297 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 33 [2020-11-09 16:22:16,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:16,298 INFO L225 Difference]: With dead ends: 172 [2020-11-09 16:22:16,298 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 16:22:16,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1907 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2056, Invalid=4586, Unknown=0, NotChecked=0, Total=6642 [2020-11-09 16:22:16,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 16:22:16,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 81. [2020-11-09 16:22:16,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-11-09 16:22:16,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 197 transitions. [2020-11-09 16:22:16,302 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 197 transitions. Word has length 33 [2020-11-09 16:22:16,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:16,302 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 197 transitions. [2020-11-09 16:22:16,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-09 16:22:16,302 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 197 transitions. [2020-11-09 16:22:16,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-11-09 16:22:16,303 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:16,303 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:16,503 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-09 16:22:16,504 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:16,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:16,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1681317131, now seen corresponding path program 59 times [2020-11-09 16:22:16,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:16,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934615153] [2020-11-09 16:22:16,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:17,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934615153] [2020-11-09 16:22:17,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59248867] [2020-11-09 16:22:17,012 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 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 [2020-11-09 16:22:17,106 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2020-11-09 16:22:17,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:17,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 29 conjunts are in the unsatisfiable core [2020-11-09 16:22:17,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:17,145 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:17,174 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:17,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:17,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2020-11-09 16:22:17,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1927060122] [2020-11-09 16:22:17,175 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:17,180 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:17,192 INFO L252 McrAutomatonBuilder]: Finished intersection with 40 states and 45 transitions. [2020-11-09 16:22:17,193 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:17,208 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:17,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-09 16:22:17,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:17,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-09 16:22:17,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2020-11-09 16:22:17,209 INFO L87 Difference]: Start difference. First operand 81 states and 197 transitions. Second operand 29 states. [2020-11-09 16:22:19,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:19,505 INFO L93 Difference]: Finished difference Result 144 states and 353 transitions. [2020-11-09 16:22:19,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-11-09 16:22:19,506 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 33 [2020-11-09 16:22:19,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:19,508 INFO L225 Difference]: With dead ends: 144 [2020-11-09 16:22:19,508 INFO L226 Difference]: Without dead ends: 139 [2020-11-09 16:22:19,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1653 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1902, Invalid=4260, Unknown=0, NotChecked=0, Total=6162 [2020-11-09 16:22:19,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-11-09 16:22:19,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 109. [2020-11-09 16:22:19,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-11-09 16:22:19,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 281 transitions. [2020-11-09 16:22:19,512 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 281 transitions. Word has length 33 [2020-11-09 16:22:19,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:19,512 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 281 transitions. [2020-11-09 16:22:19,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-09 16:22:19,513 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 281 transitions. [2020-11-09 16:22:19,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 16:22:19,513 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:19,513 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:19,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:19,724 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:19,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:19,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1513913714, now seen corresponding path program 60 times [2020-11-09 16:22:19,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:19,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626493105] [2020-11-09 16:22:19,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:20,404 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:20,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626493105] [2020-11-09 16:22:20,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053535114] [2020-11-09 16:22:20,404 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 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 [2020-11-09 16:22:20,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2020-11-09 16:22:20,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:20,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 16:22:20,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:20,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:20,521 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:20,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:20,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2020-11-09 16:22:20,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1192992628] [2020-11-09 16:22:20,522 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:20,527 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:20,537 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 49 transitions. [2020-11-09 16:22:20,537 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:20,540 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:20,541 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:20,583 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:20,583 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:20,616 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:20,617 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:20,648 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [22822#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:22:20,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 16:22:20,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:20,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 16:22:20,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=229, Invalid=701, Unknown=0, NotChecked=0, Total=930 [2020-11-09 16:22:20,649 INFO L87 Difference]: Start difference. First operand 109 states and 281 transitions. Second operand 31 states. [2020-11-09 16:22:21,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:21,830 INFO L93 Difference]: Finished difference Result 144 states and 351 transitions. [2020-11-09 16:22:21,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-09 16:22:21,831 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-11-09 16:22:21,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:21,833 INFO L225 Difference]: With dead ends: 144 [2020-11-09 16:22:21,833 INFO L226 Difference]: Without dead ends: 138 [2020-11-09 16:22:21,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1060, Invalid=2362, Unknown=0, NotChecked=0, Total=3422 [2020-11-09 16:22:21,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-09 16:22:21,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 113. [2020-11-09 16:22:21,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-11-09 16:22:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 289 transitions. [2020-11-09 16:22:21,837 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 289 transitions. Word has length 34 [2020-11-09 16:22:21,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:21,837 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 289 transitions. [2020-11-09 16:22:21,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 16:22:21,837 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 289 transitions. [2020-11-09 16:22:21,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 16:22:21,838 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:21,838 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:22,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2020-11-09 16:22:22,039 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:22,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:22,040 INFO L82 PathProgramCache]: Analyzing trace with hash 1684218372, now seen corresponding path program 61 times [2020-11-09 16:22:22,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:22,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309116710] [2020-11-09 16:22:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:22,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:22,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309116710] [2020-11-09 16:22:22,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178319228] [2020-11-09 16:22:22,577 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 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 [2020-11-09 16:22:22,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:22,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 30 conjunts are in the unsatisfiable core [2020-11-09 16:22:22,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:22,716 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:22,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:22,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-09 16:22:22,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [23040973] [2020-11-09 16:22:22,754 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:22,759 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:22,767 INFO L252 McrAutomatonBuilder]: Finished intersection with 39 states and 42 transitions. [2020-11-09 16:22:22,768 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:22,774 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:22,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-11-09 16:22:22,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:22,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-11-09 16:22:22,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-11-09 16:22:22,775 INFO L87 Difference]: Start difference. First operand 113 states and 289 transitions. Second operand 30 states. [2020-11-09 16:22:25,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:25,122 INFO L93 Difference]: Finished difference Result 174 states and 415 transitions. [2020-11-09 16:22:25,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-09 16:22:25,123 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 34 [2020-11-09 16:22:25,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:25,124 INFO L225 Difference]: With dead ends: 174 [2020-11-09 16:22:25,124 INFO L226 Difference]: Without dead ends: 169 [2020-11-09 16:22:25,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2030 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2180, Invalid=4792, Unknown=0, NotChecked=0, Total=6972 [2020-11-09 16:22:25,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-11-09 16:22:25,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 86. [2020-11-09 16:22:25,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-11-09 16:22:25,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 209 transitions. [2020-11-09 16:22:25,128 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 209 transitions. Word has length 34 [2020-11-09 16:22:25,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:25,128 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 209 transitions. [2020-11-09 16:22:25,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-11-09 16:22:25,128 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 209 transitions. [2020-11-09 16:22:25,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-11-09 16:22:25,128 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:25,128 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:25,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:25,332 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:25,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:25,333 INFO L82 PathProgramCache]: Analyzing trace with hash -581198294, now seen corresponding path program 62 times [2020-11-09 16:22:25,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:25,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352998206] [2020-11-09 16:22:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:25,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:25,823 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:25,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352998206] [2020-11-09 16:22:25,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108422573] [2020-11-09 16:22:25,824 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 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 [2020-11-09 16:22:25,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:22:25,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:25,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 16:22:25,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:25,997 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:25,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:25,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2020-11-09 16:22:25,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [540092967] [2020-11-09 16:22:25,998 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:26,003 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:26,017 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 48 transitions. [2020-11-09 16:22:26,017 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:26,064 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23961#(and (<= ~i~0 31) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:22:26,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 16:22:26,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:26,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 16:22:26,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=771, Unknown=0, NotChecked=0, Total=992 [2020-11-09 16:22:26,065 INFO L87 Difference]: Start difference. First operand 86 states and 209 transitions. Second operand 31 states. [2020-11-09 16:22:28,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:28,562 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-11-09 16:22:28,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-11-09 16:22:28,563 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 34 [2020-11-09 16:22:28,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:28,565 INFO L225 Difference]: With dead ends: 182 [2020-11-09 16:22:28,565 INFO L226 Difference]: Without dead ends: 173 [2020-11-09 16:22:28,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1818 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=2077, Invalid=4729, Unknown=0, NotChecked=0, Total=6806 [2020-11-09 16:22:28,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-09 16:22:28,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 114. [2020-11-09 16:22:28,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-09 16:22:28,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 293 transitions. [2020-11-09 16:22:28,571 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 293 transitions. Word has length 34 [2020-11-09 16:22:28,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:28,571 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 293 transitions. [2020-11-09 16:22:28,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 16:22:28,571 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 293 transitions. [2020-11-09 16:22:28,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-09 16:22:28,572 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:28,572 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:28,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-11-09 16:22:28,778 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:28,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:28,778 INFO L82 PathProgramCache]: Analyzing trace with hash 671187195, now seen corresponding path program 63 times [2020-11-09 16:22:28,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:28,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499304441] [2020-11-09 16:22:28,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:29,347 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:29,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499304441] [2020-11-09 16:22:29,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311791929] [2020-11-09 16:22:29,348 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 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 [2020-11-09 16:22:29,439 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2020-11-09 16:22:29,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:29,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-09 16:22:29,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:29,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:29,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-09 16:22:29,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [831899518] [2020-11-09 16:22:29,520 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:29,524 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:29,532 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 45 transitions. [2020-11-09 16:22:29,533 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:29,571 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [24608#(and (<= ~i~0 29) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:22:29,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-09 16:22:29,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:29,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-09 16:22:29,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=820, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 16:22:29,572 INFO L87 Difference]: Start difference. First operand 114 states and 293 transitions. Second operand 32 states. [2020-11-09 16:22:32,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:32,172 INFO L93 Difference]: Finished difference Result 182 states and 433 transitions. [2020-11-09 16:22:32,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-09 16:22:32,173 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 35 [2020-11-09 16:22:32,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:32,175 INFO L225 Difference]: With dead ends: 182 [2020-11-09 16:22:32,175 INFO L226 Difference]: Without dead ends: 173 [2020-11-09 16:22:32,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2368, Invalid=5288, Unknown=0, NotChecked=0, Total=7656 [2020-11-09 16:22:32,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-11-09 16:22:32,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 85. [2020-11-09 16:22:32,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-11-09 16:22:32,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 207 transitions. [2020-11-09 16:22:32,180 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 207 transitions. Word has length 35 [2020-11-09 16:22:32,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:32,180 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 207 transitions. [2020-11-09 16:22:32,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-09 16:22:32,180 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 207 transitions. [2020-11-09 16:22:32,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-09 16:22:32,181 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:32,181 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:32,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:32,392 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:32,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:32,392 INFO L82 PathProgramCache]: Analyzing trace with hash -837249832, now seen corresponding path program 64 times [2020-11-09 16:22:32,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:32,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963371597] [2020-11-09 16:22:32,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:32,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:32,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963371597] [2020-11-09 16:22:32,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634624492] [2020-11-09 16:22:32,957 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 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 [2020-11-09 16:22:33,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:22:33,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:33,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 31 conjunts are in the unsatisfiable core [2020-11-09 16:22:33,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:33,083 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:33,114 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:33,115 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:33,115 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2020-11-09 16:22:33,115 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1978810638] [2020-11-09 16:22:33,115 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:33,121 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:33,133 INFO L252 McrAutomatonBuilder]: Finished intersection with 42 states and 47 transitions. [2020-11-09 16:22:33,134 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:33,150 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:33,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-09 16:22:33,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:33,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-09 16:22:33,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=758, Unknown=0, NotChecked=0, Total=992 [2020-11-09 16:22:33,151 INFO L87 Difference]: Start difference. First operand 85 states and 207 transitions. Second operand 31 states. [2020-11-09 16:22:35,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:35,689 INFO L93 Difference]: Finished difference Result 152 states and 373 transitions. [2020-11-09 16:22:35,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-11-09 16:22:35,690 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 35 [2020-11-09 16:22:35,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:35,691 INFO L225 Difference]: With dead ends: 152 [2020-11-09 16:22:35,691 INFO L226 Difference]: Without dead ends: 147 [2020-11-09 16:22:35,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1934 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2202, Invalid=4938, Unknown=0, NotChecked=0, Total=7140 [2020-11-09 16:22:35,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-11-09 16:22:35,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 115. [2020-11-09 16:22:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-11-09 16:22:35,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 297 transitions. [2020-11-09 16:22:35,696 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 297 transitions. Word has length 35 [2020-11-09 16:22:35,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:35,696 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 297 transitions. [2020-11-09 16:22:35,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-09 16:22:35,696 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 297 transitions. [2020-11-09 16:22:35,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 16:22:35,697 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:35,697 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:35,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-11-09 16:22:35,906 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:35,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:35,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1122827947, now seen corresponding path program 65 times [2020-11-09 16:22:35,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:35,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [255012473] [2020-11-09 16:22:35,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:36,696 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:36,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [255012473] [2020-11-09 16:22:36,697 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12054396] [2020-11-09 16:22:36,697 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 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 [2020-11-09 16:22:36,794 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2020-11-09 16:22:36,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:36,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-09 16:22:36,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:36,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:36,814 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:36,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:36,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2020-11-09 16:22:36,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1678973554] [2020-11-09 16:22:36,815 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:36,820 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:36,834 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 51 transitions. [2020-11-09 16:22:36,835 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:36,846 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:36,847 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:36,893 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:36,893 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:36,931 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:36,932 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:36,968 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [25830#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:22:36,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 16:22:36,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:36,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 16:22:36,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=796, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 16:22:36,970 INFO L87 Difference]: Start difference. First operand 115 states and 297 transitions. Second operand 33 states. [2020-11-09 16:22:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:38,335 INFO L93 Difference]: Finished difference Result 152 states and 371 transitions. [2020-11-09 16:22:38,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-09 16:22:38,336 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-11-09 16:22:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:38,338 INFO L225 Difference]: With dead ends: 152 [2020-11-09 16:22:38,338 INFO L226 Difference]: Without dead ends: 146 [2020-11-09 16:22:38,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1210, Invalid=2696, Unknown=0, NotChecked=0, Total=3906 [2020-11-09 16:22:38,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-11-09 16:22:38,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 119. [2020-11-09 16:22:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-11-09 16:22:38,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 305 transitions. [2020-11-09 16:22:38,342 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 305 transitions. Word has length 36 [2020-11-09 16:22:38,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:38,343 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 305 transitions. [2020-11-09 16:22:38,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 16:22:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 305 transitions. [2020-11-09 16:22:38,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 16:22:38,343 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:38,343 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:38,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:38,555 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:38,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:38,555 INFO L82 PathProgramCache]: Analyzing trace with hash -668005337, now seen corresponding path program 66 times [2020-11-09 16:22:38,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:38,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188605260] [2020-11-09 16:22:38,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:38,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:39,135 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:39,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188605260] [2020-11-09 16:22:39,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700435443] [2020-11-09 16:22:39,136 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 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 [2020-11-09 16:22:39,236 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2020-11-09 16:22:39,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:39,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-09 16:22:39,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:39,283 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:39,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:39,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-11-09 16:22:39,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1485860866] [2020-11-09 16:22:39,321 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:39,325 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:39,335 INFO L252 McrAutomatonBuilder]: Finished intersection with 41 states and 44 transitions. [2020-11-09 16:22:39,335 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:39,348 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:39,348 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-11-09 16:22:39,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:39,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-11-09 16:22:39,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=807, Unknown=0, NotChecked=0, Total=1056 [2020-11-09 16:22:39,349 INFO L87 Difference]: Start difference. First operand 119 states and 305 transitions. Second operand 32 states. [2020-11-09 16:22:42,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:42,065 INFO L93 Difference]: Finished difference Result 184 states and 439 transitions. [2020-11-09 16:22:42,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-09 16:22:42,065 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 36 [2020-11-09 16:22:42,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:42,067 INFO L225 Difference]: With dead ends: 184 [2020-11-09 16:22:42,067 INFO L226 Difference]: Without dead ends: 179 [2020-11-09 16:22:42,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2344 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=2501, Invalid=5509, Unknown=0, NotChecked=0, Total=8010 [2020-11-09 16:22:42,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-09 16:22:42,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 90. [2020-11-09 16:22:42,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-09 16:22:42,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 219 transitions. [2020-11-09 16:22:42,071 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 219 transitions. Word has length 36 [2020-11-09 16:22:42,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:42,071 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 219 transitions. [2020-11-09 16:22:42,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-11-09 16:22:42,071 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 219 transitions. [2020-11-09 16:22:42,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-11-09 16:22:42,071 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:42,072 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:42,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-11-09 16:22:42,272 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:42,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:42,273 INFO L82 PathProgramCache]: Analyzing trace with hash -184915801, now seen corresponding path program 67 times [2020-11-09 16:22:42,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:42,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191685194] [2020-11-09 16:22:42,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:42,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:42,922 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:42,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191685194] [2020-11-09 16:22:42,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975875211] [2020-11-09 16:22:42,923 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 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 [2020-11-09 16:22:43,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:43,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 32 conjunts are in the unsatisfiable core [2020-11-09 16:22:43,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:43,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:22:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:43,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:43,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2020-11-09 16:22:43,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1146061538] [2020-11-09 16:22:43,093 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:43,097 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:43,107 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 50 transitions. [2020-11-09 16:22:43,107 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:43,158 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27035#(and (<= ~i~0 33) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:22:43,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 16:22:43,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:43,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 16:22:43,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=871, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 16:22:43,160 INFO L87 Difference]: Start difference. First operand 90 states and 219 transitions. Second operand 33 states. [2020-11-09 16:22:46,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:46,014 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-11-09 16:22:46,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-11-09 16:22:46,015 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 36 [2020-11-09 16:22:46,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:46,016 INFO L225 Difference]: With dead ends: 192 [2020-11-09 16:22:46,017 INFO L226 Difference]: Without dead ends: 183 [2020-11-09 16:22:46,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=2390, Invalid=5442, Unknown=0, NotChecked=0, Total=7832 [2020-11-09 16:22:46,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-11-09 16:22:46,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 120. [2020-11-09 16:22:46,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-09 16:22:46,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 309 transitions. [2020-11-09 16:22:46,021 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 309 transitions. Word has length 36 [2020-11-09 16:22:46,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:46,022 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 309 transitions. [2020-11-09 16:22:46,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 16:22:46,022 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 309 transitions. [2020-11-09 16:22:46,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-09 16:22:46,022 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:46,022 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:46,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-11-09 16:22:46,233 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:46,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:46,233 INFO L82 PathProgramCache]: Analyzing trace with hash 766696248, now seen corresponding path program 68 times [2020-11-09 16:22:46,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:46,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128815767] [2020-11-09 16:22:46,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:46,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:46,922 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:46,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128815767] [2020-11-09 16:22:46,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517918972] [2020-11-09 16:22:46,923 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 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 [2020-11-09 16:22:47,010 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:22:47,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:47,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 16:22:47,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:47,098 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:47,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:47,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-09 16:22:47,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1242807727] [2020-11-09 16:22:47,099 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:47,103 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:47,118 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 47 transitions. [2020-11-09 16:22:47,118 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:47,166 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [27720#(and (<= ~i~0 31) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:22:47,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-09 16:22:47,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:47,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-09 16:22:47,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=923, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 16:22:47,167 INFO L87 Difference]: Start difference. First operand 120 states and 309 transitions. Second operand 34 states. [2020-11-09 16:22:50,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:50,146 INFO L93 Difference]: Finished difference Result 192 states and 457 transitions. [2020-11-09 16:22:50,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-09 16:22:50,147 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 37 [2020-11-09 16:22:50,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:50,149 INFO L225 Difference]: With dead ends: 192 [2020-11-09 16:22:50,149 INFO L226 Difference]: Without dead ends: 183 [2020-11-09 16:22:50,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2539 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2702, Invalid=6040, Unknown=0, NotChecked=0, Total=8742 [2020-11-09 16:22:50,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-11-09 16:22:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 89. [2020-11-09 16:22:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-11-09 16:22:50,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 217 transitions. [2020-11-09 16:22:50,152 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 217 transitions. Word has length 37 [2020-11-09 16:22:50,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:50,152 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 217 transitions. [2020-11-09 16:22:50,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-09 16:22:50,153 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 217 transitions. [2020-11-09 16:22:50,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-11-09 16:22:50,153 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:50,153 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:50,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-11-09 16:22:50,354 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:50,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:50,354 INFO L82 PathProgramCache]: Analyzing trace with hash -1437394437, now seen corresponding path program 69 times [2020-11-09 16:22:50,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:50,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355095916] [2020-11-09 16:22:50,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:51,026 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:51,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355095916] [2020-11-09 16:22:51,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087824698] [2020-11-09 16:22:51,027 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 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 [2020-11-09 16:22:51,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2020-11-09 16:22:51,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:51,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 33 conjunts are in the unsatisfiable core [2020-11-09 16:22:51,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:51,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:51,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:51,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2020-11-09 16:22:51,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [706232878] [2020-11-09 16:22:51,228 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:51,232 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:51,243 INFO L252 McrAutomatonBuilder]: Finished intersection with 44 states and 49 transitions. [2020-11-09 16:22:51,243 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:51,254 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:51,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-09 16:22:51,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:51,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-09 16:22:51,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=857, Unknown=0, NotChecked=0, Total=1122 [2020-11-09 16:22:51,255 INFO L87 Difference]: Start difference. First operand 89 states and 217 transitions. Second operand 33 states. [2020-11-09 16:22:54,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:54,258 INFO L93 Difference]: Finished difference Result 160 states and 393 transitions. [2020-11-09 16:22:54,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-09 16:22:54,259 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 37 [2020-11-09 16:22:54,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:54,261 INFO L225 Difference]: With dead ends: 160 [2020-11-09 16:22:54,261 INFO L226 Difference]: Without dead ends: 155 [2020-11-09 16:22:54,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2237 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=2524, Invalid=5666, Unknown=0, NotChecked=0, Total=8190 [2020-11-09 16:22:54,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-11-09 16:22:54,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-11-09 16:22:54,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-11-09 16:22:54,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 313 transitions. [2020-11-09 16:22:54,265 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 313 transitions. Word has length 37 [2020-11-09 16:22:54,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:54,265 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 313 transitions. [2020-11-09 16:22:54,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-09 16:22:54,265 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 313 transitions. [2020-11-09 16:22:54,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 16:22:54,266 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:54,266 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:54,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:54,473 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:54,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:54,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1000859528, now seen corresponding path program 70 times [2020-11-09 16:22:54,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:54,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218550420] [2020-11-09 16:22:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:54,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:55,403 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:55,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218550420] [2020-11-09 16:22:55,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176653683] [2020-11-09 16:22:55,403 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 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 [2020-11-09 16:22:55,491 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:22:55,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:55,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 16:22:55,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:55,495 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:55,508 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:55,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:55,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2020-11-09 16:22:55,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1540748248] [2020-11-09 16:22:55,509 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:55,514 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:55,526 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 53 transitions. [2020-11-09 16:22:55,526 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:55,527 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:55,527 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:55,575 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:55,575 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:55,629 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:22:55,629 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:22:55,673 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [29012#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:22:55,673 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 16:22:55,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:55,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 16:22:55,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 16:22:55,675 INFO L87 Difference]: Start difference. First operand 121 states and 313 transitions. Second operand 35 states. [2020-11-09 16:22:57,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:22:57,288 INFO L93 Difference]: Finished difference Result 160 states and 391 transitions. [2020-11-09 16:22:57,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-09 16:22:57,289 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-11-09 16:22:57,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:22:57,291 INFO L225 Difference]: With dead ends: 160 [2020-11-09 16:22:57,291 INFO L226 Difference]: Without dead ends: 154 [2020-11-09 16:22:57,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1370, Invalid=3052, Unknown=0, NotChecked=0, Total=4422 [2020-11-09 16:22:57,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-09 16:22:57,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 125. [2020-11-09 16:22:57,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-11-09 16:22:57,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 321 transitions. [2020-11-09 16:22:57,295 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 321 transitions. Word has length 38 [2020-11-09 16:22:57,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:22:57,295 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 321 transitions. [2020-11-09 16:22:57,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 16:22:57,295 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 321 transitions. [2020-11-09 16:22:57,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 16:22:57,296 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:22:57,296 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:22:57,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:22:57,507 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:22:57,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:22:57,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2002191990, now seen corresponding path program 71 times [2020-11-09 16:22:57,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:22:57,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157963317] [2020-11-09 16:22:57,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:22:57,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:22:58,229 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:58,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157963317] [2020-11-09 16:22:58,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504160778] [2020-11-09 16:22:58,230 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 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 [2020-11-09 16:22:58,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2020-11-09 16:22:58,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:22:58,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 34 conjunts are in the unsatisfiable core [2020-11-09 16:22:58,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:22:58,371 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:22:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:22:58,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:22:58,412 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-09 16:22:58,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [341532951] [2020-11-09 16:22:58,413 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:22:58,419 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:22:58,434 INFO L252 McrAutomatonBuilder]: Finished intersection with 43 states and 46 transitions. [2020-11-09 16:22:58,434 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:22:58,441 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:22:58,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-11-09 16:22:58,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:22:58,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-11-09 16:22:58,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=909, Unknown=0, NotChecked=0, Total=1190 [2020-11-09 16:22:58,443 INFO L87 Difference]: Start difference. First operand 125 states and 321 transitions. Second operand 34 states. [2020-11-09 16:23:01,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:01,559 INFO L93 Difference]: Finished difference Result 194 states and 463 transitions. [2020-11-09 16:23:01,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-09 16:23:01,560 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 38 [2020-11-09 16:23:01,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:01,561 INFO L225 Difference]: With dead ends: 194 [2020-11-09 16:23:01,562 INFO L226 Difference]: Without dead ends: 189 [2020-11-09 16:23:01,562 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2680 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=2844, Invalid=6276, Unknown=0, NotChecked=0, Total=9120 [2020-11-09 16:23:01,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-11-09 16:23:01,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 94. [2020-11-09 16:23:01,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-11-09 16:23:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 229 transitions. [2020-11-09 16:23:01,566 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 229 transitions. Word has length 38 [2020-11-09 16:23:01,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:01,566 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 229 transitions. [2020-11-09 16:23:01,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-11-09 16:23:01,566 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 229 transitions. [2020-11-09 16:23:01,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-11-09 16:23:01,567 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:01,567 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:01,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:01,779 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:01,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:01,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1609529372, now seen corresponding path program 72 times [2020-11-09 16:23:01,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:01,781 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913375838] [2020-11-09 16:23:01,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:01,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:02,497 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:02,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913375838] [2020-11-09 16:23:02,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474272424] [2020-11-09 16:23:02,498 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 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 [2020-11-09 16:23:02,608 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2020-11-09 16:23:02,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:02,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 16:23:02,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:02,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:02,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2020-11-09 16:23:02,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1990764177] [2020-11-09 16:23:02,701 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:02,705 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:02,717 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 52 transitions. [2020-11-09 16:23:02,718 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:02,764 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [30283#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 35))] [2020-11-09 16:23:02,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 16:23:02,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:02,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 16:23:02,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=977, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 16:23:02,766 INFO L87 Difference]: Start difference. First operand 94 states and 229 transitions. Second operand 35 states. [2020-11-09 16:23:06,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:06,027 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-11-09 16:23:06,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-09 16:23:06,028 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 38 [2020-11-09 16:23:06,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:06,029 INFO L225 Difference]: With dead ends: 202 [2020-11-09 16:23:06,029 INFO L226 Difference]: Without dead ends: 193 [2020-11-09 16:23:06,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2428 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=2725, Invalid=6205, Unknown=0, NotChecked=0, Total=8930 [2020-11-09 16:23:06,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-09 16:23:06,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 126. [2020-11-09 16:23:06,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-09 16:23:06,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 325 transitions. [2020-11-09 16:23:06,032 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 325 transitions. Word has length 38 [2020-11-09 16:23:06,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:06,033 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 325 transitions. [2020-11-09 16:23:06,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 16:23:06,033 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 325 transitions. [2020-11-09 16:23:06,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-09 16:23:06,033 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:06,033 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:06,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-11-09 16:23:06,243 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:06,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:06,243 INFO L82 PathProgramCache]: Analyzing trace with hash -1938384331, now seen corresponding path program 73 times [2020-11-09 16:23:06,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:06,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174051222] [2020-11-09 16:23:06,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:06,999 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:06,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174051222] [2020-11-09 16:23:07,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637860990] [2020-11-09 16:23:07,000 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 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 [2020-11-09 16:23:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:07,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 16:23:07,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:07,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:23:07,160 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:07,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:07,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-11-09 16:23:07,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1431008504] [2020-11-09 16:23:07,161 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:07,166 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:07,178 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 49 transitions. [2020-11-09 16:23:07,178 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:07,224 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [31006#(and (<= ~i~0 33) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:23:07,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-09 16:23:07,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:07,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-09 16:23:07,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1032, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 16:23:07,224 INFO L87 Difference]: Start difference. First operand 126 states and 325 transitions. Second operand 36 states. [2020-11-09 16:23:10,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:10,589 INFO L93 Difference]: Finished difference Result 202 states and 481 transitions. [2020-11-09 16:23:10,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-09 16:23:10,590 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 39 [2020-11-09 16:23:10,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:10,592 INFO L225 Difference]: With dead ends: 202 [2020-11-09 16:23:10,592 INFO L226 Difference]: Without dead ends: 193 [2020-11-09 16:23:10,592 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2888 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=3058, Invalid=6842, Unknown=0, NotChecked=0, Total=9900 [2020-11-09 16:23:10,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-11-09 16:23:10,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 93. [2020-11-09 16:23:10,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-11-09 16:23:10,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 227 transitions. [2020-11-09 16:23:10,597 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 227 transitions. Word has length 39 [2020-11-09 16:23:10,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:10,597 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 227 transitions. [2020-11-09 16:23:10,598 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-09 16:23:10,598 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 227 transitions. [2020-11-09 16:23:10,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-11-09 16:23:10,598 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:10,598 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:10,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:10,808 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:10,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:10,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1644225118, now seen corresponding path program 74 times [2020-11-09 16:23:10,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:10,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599622579] [2020-11-09 16:23:10,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:10,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:11,569 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:11,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599622579] [2020-11-09 16:23:11,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101335092] [2020-11-09 16:23:11,569 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 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 [2020-11-09 16:23:11,659 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:23:11,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:11,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 35 conjunts are in the unsatisfiable core [2020-11-09 16:23:11,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:11,715 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:23:11,754 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:11,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:11,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2020-11-09 16:23:11,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [256201942] [2020-11-09 16:23:11,755 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:11,760 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:11,772 INFO L252 McrAutomatonBuilder]: Finished intersection with 46 states and 51 transitions. [2020-11-09 16:23:11,773 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:11,786 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:23:11,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-09 16:23:11,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:11,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-09 16:23:11,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=962, Unknown=0, NotChecked=0, Total=1260 [2020-11-09 16:23:11,787 INFO L87 Difference]: Start difference. First operand 93 states and 227 transitions. Second operand 35 states. [2020-11-09 16:23:15,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:15,155 INFO L93 Difference]: Finished difference Result 168 states and 413 transitions. [2020-11-09 16:23:15,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-11-09 16:23:15,156 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 39 [2020-11-09 16:23:15,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:15,157 INFO L225 Difference]: With dead ends: 168 [2020-11-09 16:23:15,157 INFO L226 Difference]: Without dead ends: 163 [2020-11-09 16:23:15,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2562 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2868, Invalid=6444, Unknown=0, NotChecked=0, Total=9312 [2020-11-09 16:23:15,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-11-09 16:23:15,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 127. [2020-11-09 16:23:15,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-11-09 16:23:15,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 329 transitions. [2020-11-09 16:23:15,161 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 329 transitions. Word has length 39 [2020-11-09 16:23:15,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:15,161 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 329 transitions. [2020-11-09 16:23:15,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-09 16:23:15,161 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 329 transitions. [2020-11-09 16:23:15,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 16:23:15,162 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:15,162 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:15,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:15,371 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:15,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:15,371 INFO L82 PathProgramCache]: Analyzing trace with hash 246674139, now seen corresponding path program 75 times [2020-11-09 16:23:15,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:15,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858433800] [2020-11-09 16:23:15,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:15,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:16,396 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:16,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858433800] [2020-11-09 16:23:16,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350519230] [2020-11-09 16:23:16,397 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 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 [2020-11-09 16:23:16,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2020-11-09 16:23:16,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:16,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 16:23:16,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:16,502 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:23:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:16,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:16,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2020-11-09 16:23:16,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [205286041] [2020-11-09 16:23:16,520 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:16,530 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:16,547 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 55 transitions. [2020-11-09 16:23:16,548 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:16,549 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:23:16,549 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:23:16,605 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:23:16,605 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:23:16,653 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:23:16,653 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:23:16,690 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [32368#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:23:16,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 16:23:16,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:16,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 16:23:16,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=1004, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 16:23:16,691 INFO L87 Difference]: Start difference. First operand 127 states and 329 transitions. Second operand 37 states. [2020-11-09 16:23:18,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:18,468 INFO L93 Difference]: Finished difference Result 168 states and 411 transitions. [2020-11-09 16:23:18,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-09 16:23:18,469 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-11-09 16:23:18,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:18,470 INFO L225 Difference]: With dead ends: 168 [2020-11-09 16:23:18,470 INFO L226 Difference]: Without dead ends: 162 [2020-11-09 16:23:18,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 894 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1540, Invalid=3430, Unknown=0, NotChecked=0, Total=4970 [2020-11-09 16:23:18,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-11-09 16:23:18,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 131. [2020-11-09 16:23:18,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-11-09 16:23:18,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 337 transitions. [2020-11-09 16:23:18,474 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 337 transitions. Word has length 40 [2020-11-09 16:23:18,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:18,474 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 337 transitions. [2020-11-09 16:23:18,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 16:23:18,474 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 337 transitions. [2020-11-09 16:23:18,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 16:23:18,475 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:18,475 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:18,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:18,679 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:18,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:18,680 INFO L82 PathProgramCache]: Analyzing trace with hash 39655981, now seen corresponding path program 76 times [2020-11-09 16:23:18,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:18,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560001281] [2020-11-09 16:23:18,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:18,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:19,495 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:19,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560001281] [2020-11-09 16:23:19,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288695604] [2020-11-09 16:23:19,496 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 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 [2020-11-09 16:23:19,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:23:19,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:19,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-09 16:23:19,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:19,637 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:23:19,675 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:19,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:19,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-09 16:23:19,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [694664103] [2020-11-09 16:23:19,675 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:19,682 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:19,698 INFO L252 McrAutomatonBuilder]: Finished intersection with 45 states and 48 transitions. [2020-11-09 16:23:19,699 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:19,706 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:23:19,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-11-09 16:23:19,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:19,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-11-09 16:23:19,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1017, Unknown=0, NotChecked=0, Total=1332 [2020-11-09 16:23:19,707 INFO L87 Difference]: Start difference. First operand 131 states and 337 transitions. Second operand 36 states. [2020-11-09 16:23:23,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:23,216 INFO L93 Difference]: Finished difference Result 204 states and 487 transitions. [2020-11-09 16:23:23,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-09 16:23:23,217 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 40 [2020-11-09 16:23:23,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:23,219 INFO L225 Difference]: With dead ends: 204 [2020-11-09 16:23:23,219 INFO L226 Difference]: Without dead ends: 199 [2020-11-09 16:23:23,220 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3038 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=3209, Invalid=7093, Unknown=0, NotChecked=0, Total=10302 [2020-11-09 16:23:23,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-11-09 16:23:23,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 98. [2020-11-09 16:23:23,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-11-09 16:23:23,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 239 transitions. [2020-11-09 16:23:23,223 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 239 transitions. Word has length 40 [2020-11-09 16:23:23,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:23,223 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 239 transitions. [2020-11-09 16:23:23,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-11-09 16:23:23,223 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 239 transitions. [2020-11-09 16:23:23,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-11-09 16:23:23,224 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:23,224 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:23,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-11-09 16:23:23,436 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:23,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:23,436 INFO L82 PathProgramCache]: Analyzing trace with hash -568603679, now seen corresponding path program 77 times [2020-11-09 16:23:23,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:23,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019706347] [2020-11-09 16:23:23,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:24,256 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:24,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019706347] [2020-11-09 16:23:24,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144053749] [2020-11-09 16:23:24,257 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 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 [2020-11-09 16:23:24,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2020-11-09 16:23:24,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:24,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 36 conjunts are in the unsatisfiable core [2020-11-09 16:23:24,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:24,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:23:24,442 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:24,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:24,443 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2020-11-09 16:23:24,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [965584031] [2020-11-09 16:23:24,443 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:24,447 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:24,460 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 54 transitions. [2020-11-09 16:23:24,460 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:24,509 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [33705#(and (<= ~i~0 37) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:23:24,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 16:23:24,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:24,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 16:23:24,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1089, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 16:23:24,510 INFO L87 Difference]: Start difference. First operand 98 states and 239 transitions. Second operand 37 states. [2020-11-09 16:23:28,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:28,127 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-11-09 16:23:28,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-11-09 16:23:28,128 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 40 [2020-11-09 16:23:28,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:28,130 INFO L225 Difference]: With dead ends: 212 [2020-11-09 16:23:28,130 INFO L226 Difference]: Without dead ends: 203 [2020-11-09 16:23:28,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2766 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=3082, Invalid=7018, Unknown=0, NotChecked=0, Total=10100 [2020-11-09 16:23:28,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-09 16:23:28,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 132. [2020-11-09 16:23:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-09 16:23:28,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 341 transitions. [2020-11-09 16:23:28,133 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 341 transitions. Word has length 40 [2020-11-09 16:23:28,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:28,134 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 341 transitions. [2020-11-09 16:23:28,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 16:23:28,134 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 341 transitions. [2020-11-09 16:23:28,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-09 16:23:28,134 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:28,134 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:28,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:28,341 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:28,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:28,341 INFO L82 PathProgramCache]: Analyzing trace with hash 1229360626, now seen corresponding path program 78 times [2020-11-09 16:23:28,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:28,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37088078] [2020-11-09 16:23:28,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:29,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37088078] [2020-11-09 16:23:29,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272006089] [2020-11-09 16:23:29,207 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 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 [2020-11-09 16:23:29,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2020-11-09 16:23:29,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:29,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 16:23:29,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:29,366 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:23:29,404 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:29,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:29,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-11-09 16:23:29,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1666682478] [2020-11-09 16:23:29,405 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:29,408 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:29,422 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 51 transitions. [2020-11-09 16:23:29,422 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:29,466 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [34466#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 35))] [2020-11-09 16:23:29,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-09 16:23:29,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:29,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-09 16:23:29,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1147, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 16:23:29,468 INFO L87 Difference]: Start difference. First operand 132 states and 341 transitions. Second operand 38 states. [2020-11-09 16:23:33,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:33,241 INFO L93 Difference]: Finished difference Result 212 states and 505 transitions. [2020-11-09 16:23:33,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-09 16:23:33,242 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 41 [2020-11-09 16:23:33,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:33,244 INFO L225 Difference]: With dead ends: 212 [2020-11-09 16:23:33,244 INFO L226 Difference]: Without dead ends: 203 [2020-11-09 16:23:33,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3259 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3436, Invalid=7694, Unknown=0, NotChecked=0, Total=11130 [2020-11-09 16:23:33,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-11-09 16:23:33,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 97. [2020-11-09 16:23:33,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-11-09 16:23:33,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 237 transitions. [2020-11-09 16:23:33,248 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 237 transitions. Word has length 41 [2020-11-09 16:23:33,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:33,248 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 237 transitions. [2020-11-09 16:23:33,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-09 16:23:33,248 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 237 transitions. [2020-11-09 16:23:33,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-11-09 16:23:33,248 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:33,248 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:33,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-11-09 16:23:33,452 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:33,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:33,452 INFO L82 PathProgramCache]: Analyzing trace with hash -446816767, now seen corresponding path program 79 times [2020-11-09 16:23:33,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:33,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243931678] [2020-11-09 16:23:33,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:33,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:34,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243931678] [2020-11-09 16:23:34,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097784916] [2020-11-09 16:23:34,326 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 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 [2020-11-09 16:23:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:34,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 243 conjuncts, 37 conjunts are in the unsatisfiable core [2020-11-09 16:23:34,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:34,476 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:23:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:34,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:34,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2020-11-09 16:23:34,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [206915943] [2020-11-09 16:23:34,523 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:34,527 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:34,542 INFO L252 McrAutomatonBuilder]: Finished intersection with 48 states and 53 transitions. [2020-11-09 16:23:34,542 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:34,558 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:23:34,559 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-09 16:23:34,559 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:34,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-09 16:23:34,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=1073, Unknown=0, NotChecked=0, Total=1406 [2020-11-09 16:23:34,560 INFO L87 Difference]: Start difference. First operand 97 states and 237 transitions. Second operand 37 states. [2020-11-09 16:23:38,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:38,336 INFO L93 Difference]: Finished difference Result 176 states and 433 transitions. [2020-11-09 16:23:38,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2020-11-09 16:23:38,337 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 41 [2020-11-09 16:23:38,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:38,338 INFO L225 Difference]: With dead ends: 176 [2020-11-09 16:23:38,338 INFO L226 Difference]: Without dead ends: 171 [2020-11-09 16:23:38,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2909 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=3234, Invalid=7272, Unknown=0, NotChecked=0, Total=10506 [2020-11-09 16:23:38,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-11-09 16:23:38,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2020-11-09 16:23:38,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-11-09 16:23:38,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 345 transitions. [2020-11-09 16:23:38,343 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 345 transitions. Word has length 41 [2020-11-09 16:23:38,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:38,343 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 345 transitions. [2020-11-09 16:23:38,343 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-09 16:23:38,343 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 345 transitions. [2020-11-09 16:23:38,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 16:23:38,344 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:38,344 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:38,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:38,553 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:38,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:38,554 INFO L82 PathProgramCache]: Analyzing trace with hash 830652542, now seen corresponding path program 80 times [2020-11-09 16:23:38,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:38,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746435704] [2020-11-09 16:23:38,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:38,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:39,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746435704] [2020-11-09 16:23:39,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40425204] [2020-11-09 16:23:39,720 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 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 [2020-11-09 16:23:39,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:23:39,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:39,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 16:23:39,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:39,820 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:23:39,848 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:39,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:39,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2020-11-09 16:23:39,849 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [230274886] [2020-11-09 16:23:39,849 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:39,854 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:39,874 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 57 transitions. [2020-11-09 16:23:39,874 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:39,875 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:23:39,876 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:23:39,945 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:23:39,945 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:23:39,997 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:23:39,997 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:23:40,043 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [35898#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:23:40,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-09 16:23:40,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:40,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-09 16:23:40,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1117, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 16:23:40,044 INFO L87 Difference]: Start difference. First operand 133 states and 345 transitions. Second operand 39 states. [2020-11-09 16:23:42,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:42,051 INFO L93 Difference]: Finished difference Result 176 states and 431 transitions. [2020-11-09 16:23:42,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-09 16:23:42,052 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-11-09 16:23:42,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:42,053 INFO L225 Difference]: With dead ends: 176 [2020-11-09 16:23:42,053 INFO L226 Difference]: Without dead ends: 170 [2020-11-09 16:23:42,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1720, Invalid=3830, Unknown=0, NotChecked=0, Total=5550 [2020-11-09 16:23:42,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-11-09 16:23:42,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 137. [2020-11-09 16:23:42,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-11-09 16:23:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 353 transitions. [2020-11-09 16:23:42,057 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 353 transitions. Word has length 42 [2020-11-09 16:23:42,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:42,057 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 353 transitions. [2020-11-09 16:23:42,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-09 16:23:42,057 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 353 transitions. [2020-11-09 16:23:42,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 16:23:42,058 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:42,058 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:42,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:42,261 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:42,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:42,261 INFO L82 PathProgramCache]: Analyzing trace with hash -544498160, now seen corresponding path program 81 times [2020-11-09 16:23:42,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:42,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17314428] [2020-11-09 16:23:42,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:42,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:43,195 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:43,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17314428] [2020-11-09 16:23:43,196 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622573608] [2020-11-09 16:23:43,196 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 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 [2020-11-09 16:23:43,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 17 check-sat command(s) [2020-11-09 16:23:43,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:43,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-09 16:23:43,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:43,353 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:23:43,400 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:43,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:43,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-11-09 16:23:43,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [763577552] [2020-11-09 16:23:43,401 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:43,405 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:43,419 INFO L252 McrAutomatonBuilder]: Finished intersection with 47 states and 50 transitions. [2020-11-09 16:23:43,419 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:43,426 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:23:43,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-11-09 16:23:43,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:43,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-11-09 16:23:43,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1131, Unknown=0, NotChecked=0, Total=1482 [2020-11-09 16:23:43,427 INFO L87 Difference]: Start difference. First operand 137 states and 353 transitions. Second operand 38 states. [2020-11-09 16:23:47,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:47,369 INFO L93 Difference]: Finished difference Result 214 states and 511 transitions. [2020-11-09 16:23:47,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-09 16:23:47,371 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 42 [2020-11-09 16:23:47,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:47,373 INFO L225 Difference]: With dead ends: 214 [2020-11-09 16:23:47,373 INFO L226 Difference]: Without dead ends: 209 [2020-11-09 16:23:47,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=3596, Invalid=7960, Unknown=0, NotChecked=0, Total=11556 [2020-11-09 16:23:47,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-11-09 16:23:47,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 102. [2020-11-09 16:23:47,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-09 16:23:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 249 transitions. [2020-11-09 16:23:47,376 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 249 transitions. Word has length 42 [2020-11-09 16:23:47,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:47,376 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 249 transitions. [2020-11-09 16:23:47,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-11-09 16:23:47,377 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 249 transitions. [2020-11-09 16:23:47,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-09 16:23:47,377 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:47,377 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:47,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:47,578 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:47,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:47,578 INFO L82 PathProgramCache]: Analyzing trace with hash -966392674, now seen corresponding path program 82 times [2020-11-09 16:23:47,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:47,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808862597] [2020-11-09 16:23:47,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:47,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:48,503 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:48,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808862597] [2020-11-09 16:23:48,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112973102] [2020-11-09 16:23:48,504 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 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 [2020-11-09 16:23:48,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:23:48,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:48,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 38 conjunts are in the unsatisfiable core [2020-11-09 16:23:48,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:48,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:23:48,693 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:48,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:48,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2020-11-09 16:23:48,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1617391471] [2020-11-09 16:23:48,693 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:48,699 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:48,719 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 56 transitions. [2020-11-09 16:23:48,719 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:48,785 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [37301#(and (<= ~i~0 39) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:23:48,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-09 16:23:48,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:48,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-09 16:23:48,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1207, Unknown=0, NotChecked=0, Total=1560 [2020-11-09 16:23:48,786 INFO L87 Difference]: Start difference. First operand 102 states and 249 transitions. Second operand 39 states. [2020-11-09 16:23:52,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:52,894 INFO L93 Difference]: Finished difference Result 222 states and 529 transitions. [2020-11-09 16:23:52,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2020-11-09 16:23:52,894 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 42 [2020-11-09 16:23:52,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:52,896 INFO L225 Difference]: With dead ends: 222 [2020-11-09 16:23:52,896 INFO L226 Difference]: Without dead ends: 213 [2020-11-09 16:23:52,897 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3126 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=3461, Invalid=7881, Unknown=0, NotChecked=0, Total=11342 [2020-11-09 16:23:52,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-09 16:23:52,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 138. [2020-11-09 16:23:52,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-11-09 16:23:52,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 357 transitions. [2020-11-09 16:23:52,901 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 357 transitions. Word has length 42 [2020-11-09 16:23:52,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:52,901 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 357 transitions. [2020-11-09 16:23:52,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-09 16:23:52,901 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 357 transitions. [2020-11-09 16:23:52,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-09 16:23:52,902 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:52,902 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:53,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:53,102 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:53,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:53,103 INFO L82 PathProgramCache]: Analyzing trace with hash 300451439, now seen corresponding path program 83 times [2020-11-09 16:23:53,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:53,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599834440] [2020-11-09 16:23:53,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:53,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:54,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599834440] [2020-11-09 16:23:54,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [756215247] [2020-11-09 16:23:54,092 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 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 [2020-11-09 16:23:54,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2020-11-09 16:23:54,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:54,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 16:23:54,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:23:54,260 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:23:54,301 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:54,301 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:23:54,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-11-09 16:23:54,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1620293144] [2020-11-09 16:23:54,301 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:23:54,305 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:23:54,319 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 53 transitions. [2020-11-09 16:23:54,320 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:23:54,370 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [38100#(and (<= ~i~0 37) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:23:54,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-09 16:23:54,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:23:54,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-09 16:23:54,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=372, Invalid=1268, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 16:23:54,371 INFO L87 Difference]: Start difference. First operand 138 states and 357 transitions. Second operand 40 states. [2020-11-09 16:23:58,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:23:58,639 INFO L93 Difference]: Finished difference Result 222 states and 529 transitions. [2020-11-09 16:23:58,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-09 16:23:58,641 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 43 [2020-11-09 16:23:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:23:58,643 INFO L225 Difference]: With dead ends: 222 [2020-11-09 16:23:58,643 INFO L226 Difference]: Without dead ends: 213 [2020-11-09 16:23:58,644 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3652 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3836, Invalid=8596, Unknown=0, NotChecked=0, Total=12432 [2020-11-09 16:23:58,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-11-09 16:23:58,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 101. [2020-11-09 16:23:58,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-11-09 16:23:58,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-11-09 16:23:58,646 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 43 [2020-11-09 16:23:58,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:23:58,647 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-11-09 16:23:58,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-09 16:23:58,647 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-11-09 16:23:58,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-11-09 16:23:58,647 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:23:58,647 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:23:58,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:23:58,850 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:23:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:23:58,850 INFO L82 PathProgramCache]: Analyzing trace with hash 106626276, now seen corresponding path program 84 times [2020-11-09 16:23:58,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:23:58,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852530133] [2020-11-09 16:23:58,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:23:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:23:59,867 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:23:59,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852530133] [2020-11-09 16:23:59,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800162070] [2020-11-09 16:23:59,868 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 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 [2020-11-09 16:23:59,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2020-11-09 16:23:59,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:23:59,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 39 conjunts are in the unsatisfiable core [2020-11-09 16:23:59,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:24:00,031 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:24:00,081 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:00,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:24:00,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2020-11-09 16:24:00,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1331055480] [2020-11-09 16:24:00,082 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:24:00,088 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:24:00,108 INFO L252 McrAutomatonBuilder]: Finished intersection with 50 states and 55 transitions. [2020-11-09 16:24:00,108 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:24:00,125 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:24:00,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-09 16:24:00,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:00,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-09 16:24:00,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1190, Unknown=0, NotChecked=0, Total=1560 [2020-11-09 16:24:00,126 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 39 states. [2020-11-09 16:24:04,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:24:04,367 INFO L93 Difference]: Finished difference Result 184 states and 453 transitions. [2020-11-09 16:24:04,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-09 16:24:04,368 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 43 [2020-11-09 16:24:04,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:24:04,369 INFO L225 Difference]: With dead ends: 184 [2020-11-09 16:24:04,369 INFO L226 Difference]: Without dead ends: 179 [2020-11-09 16:24:04,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3278 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=3622, Invalid=8150, Unknown=0, NotChecked=0, Total=11772 [2020-11-09 16:24:04,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-11-09 16:24:04,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 139. [2020-11-09 16:24:04,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-11-09 16:24:04,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 361 transitions. [2020-11-09 16:24:04,373 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 361 transitions. Word has length 43 [2020-11-09 16:24:04,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:24:04,373 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 361 transitions. [2020-11-09 16:24:04,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-09 16:24:04,374 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 361 transitions. [2020-11-09 16:24:04,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 16:24:04,374 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:24:04,374 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:24:04,576 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:24:04,576 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:24:04,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:24:04,577 INFO L82 PathProgramCache]: Analyzing trace with hash -606817951, now seen corresponding path program 85 times [2020-11-09 16:24:04,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:24:04,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858460945] [2020-11-09 16:24:04,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:24:04,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:05,916 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:05,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858460945] [2020-11-09 16:24:05,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142765408] [2020-11-09 16:24:05,917 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 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 [2020-11-09 16:24:06,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:06,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 16:24:06,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:24:06,019 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:24:06,037 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:06,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:24:06,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2020-11-09 16:24:06,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [80098158] [2020-11-09 16:24:06,037 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:24:06,043 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:24:06,082 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 59 transitions. [2020-11-09 16:24:06,083 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:24:06,084 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:24:06,084 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:24:06,152 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:24:06,152 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:24:06,209 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:24:06,209 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:24:06,259 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [39602#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:24:06,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-09 16:24:06,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:06,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-09 16:24:06,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=1236, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 16:24:06,260 INFO L87 Difference]: Start difference. First operand 139 states and 361 transitions. Second operand 41 states. [2020-11-09 16:24:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:24:08,521 INFO L93 Difference]: Finished difference Result 184 states and 451 transitions. [2020-11-09 16:24:08,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-09 16:24:08,522 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-11-09 16:24:08,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:24:08,524 INFO L225 Difference]: With dead ends: 184 [2020-11-09 16:24:08,524 INFO L226 Difference]: Without dead ends: 178 [2020-11-09 16:24:08,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1114 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1910, Invalid=4252, Unknown=0, NotChecked=0, Total=6162 [2020-11-09 16:24:08,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-09 16:24:08,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 143. [2020-11-09 16:24:08,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-11-09 16:24:08,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 369 transitions. [2020-11-09 16:24:08,527 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 369 transitions. Word has length 44 [2020-11-09 16:24:08,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:24:08,527 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 369 transitions. [2020-11-09 16:24:08,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-09 16:24:08,528 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 369 transitions. [2020-11-09 16:24:08,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 16:24:08,528 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:24:08,528 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:24:08,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:24:08,738 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:24:08,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:24:08,738 INFO L82 PathProgramCache]: Analyzing trace with hash 724088115, now seen corresponding path program 86 times [2020-11-09 16:24:08,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:24:08,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86711093] [2020-11-09 16:24:08,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:24:08,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:09,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86711093] [2020-11-09 16:24:09,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86098812] [2020-11-09 16:24:09,817 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 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 [2020-11-09 16:24:09,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-09 16:24:09,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:24:09,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 40 conjunts are in the unsatisfiable core [2020-11-09 16:24:09,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:24:09,984 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:24:10,037 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:10,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:24:10,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-11-09 16:24:10,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [873390888] [2020-11-09 16:24:10,038 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:24:10,044 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:24:10,065 INFO L252 McrAutomatonBuilder]: Finished intersection with 49 states and 52 transitions. [2020-11-09 16:24:10,065 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:24:10,080 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:24:10,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-11-09 16:24:10,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:10,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-11-09 16:24:10,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=1251, Unknown=0, NotChecked=0, Total=1640 [2020-11-09 16:24:10,081 INFO L87 Difference]: Start difference. First operand 143 states and 369 transitions. Second operand 40 states. [2020-11-09 16:24:14,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:24:14,477 INFO L93 Difference]: Finished difference Result 224 states and 535 transitions. [2020-11-09 16:24:14,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-09 16:24:14,478 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 44 [2020-11-09 16:24:14,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:24:14,480 INFO L225 Difference]: With dead ends: 224 [2020-11-09 16:24:14,480 INFO L226 Difference]: Without dead ends: 219 [2020-11-09 16:24:14,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3820 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=4005, Invalid=8877, Unknown=0, NotChecked=0, Total=12882 [2020-11-09 16:24:14,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-11-09 16:24:14,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 106. [2020-11-09 16:24:14,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-11-09 16:24:14,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 259 transitions. [2020-11-09 16:24:14,484 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 259 transitions. Word has length 44 [2020-11-09 16:24:14,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:24:14,484 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 259 transitions. [2020-11-09 16:24:14,484 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-11-09 16:24:14,484 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 259 transitions. [2020-11-09 16:24:14,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-11-09 16:24:14,484 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:24:14,484 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:24:14,685 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-11-09 16:24:14,685 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:24:14,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:24:14,687 INFO L82 PathProgramCache]: Analyzing trace with hash -989527525, now seen corresponding path program 87 times [2020-11-09 16:24:14,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:24:14,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094301657] [2020-11-09 16:24:14,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:24:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:15,746 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:15,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094301657] [2020-11-09 16:24:15,746 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619668110] [2020-11-09 16:24:15,747 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 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 [2020-11-09 16:24:15,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2020-11-09 16:24:15,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:24:15,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 16:24:15,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:24:15,969 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:15,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:24:15,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2020-11-09 16:24:15,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2061076164] [2020-11-09 16:24:15,970 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:24:15,974 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:24:15,991 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 58 transitions. [2020-11-09 16:24:15,991 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:24:16,052 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41071#(and (= ULTIMATE.start_main_~condI~0 0) (<= ~i~0 41))] [2020-11-09 16:24:16,052 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-09 16:24:16,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:16,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-09 16:24:16,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1331, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 16:24:16,054 INFO L87 Difference]: Start difference. First operand 106 states and 259 transitions. Second operand 41 states. [2020-11-09 16:24:20,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:24:20,665 INFO L93 Difference]: Finished difference Result 232 states and 553 transitions. [2020-11-09 16:24:20,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-09 16:24:20,666 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 44 [2020-11-09 16:24:20,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:24:20,667 INFO L225 Difference]: With dead ends: 232 [2020-11-09 16:24:20,667 INFO L226 Difference]: Without dead ends: 223 [2020-11-09 16:24:20,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3508 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=3862, Invalid=8794, Unknown=0, NotChecked=0, Total=12656 [2020-11-09 16:24:20,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-11-09 16:24:20,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 144. [2020-11-09 16:24:20,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-09 16:24:20,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 373 transitions. [2020-11-09 16:24:20,672 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 373 transitions. Word has length 44 [2020-11-09 16:24:20,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:24:20,672 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 373 transitions. [2020-11-09 16:24:20,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-09 16:24:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 373 transitions. [2020-11-09 16:24:20,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-09 16:24:20,673 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:24:20,673 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:24:20,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:24:20,879 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:24:20,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:24:20,880 INFO L82 PathProgramCache]: Analyzing trace with hash 971920300, now seen corresponding path program 88 times [2020-11-09 16:24:20,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:24:20,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535714687] [2020-11-09 16:24:20,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:24:20,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:21,988 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:21,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535714687] [2020-11-09 16:24:21,988 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772340186] [2020-11-09 16:24:21,988 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 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 [2020-11-09 16:24:22,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-09 16:24:22,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:24:22,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 16:24:22,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:24:22,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-09 16:24:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:22,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:24:22,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-11-09 16:24:22,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [6897873] [2020-11-09 16:24:22,189 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:24:22,195 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:24:22,218 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 55 transitions. [2020-11-09 16:24:22,218 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:24:22,278 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [41908#(and (<= ~i~0 39) (= ULTIMATE.start_main_~condI~0 0))] [2020-11-09 16:24:22,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-09 16:24:22,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:22,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-09 16:24:22,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1395, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 16:24:22,280 INFO L87 Difference]: Start difference. First operand 144 states and 373 transitions. Second operand 42 states. [2020-11-09 16:24:27,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:24:27,063 INFO L93 Difference]: Finished difference Result 232 states and 553 transitions. [2020-11-09 16:24:27,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2020-11-09 16:24:27,065 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 45 [2020-11-09 16:24:27,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:24:27,067 INFO L225 Difference]: With dead ends: 232 [2020-11-09 16:24:27,067 INFO L226 Difference]: Without dead ends: 223 [2020-11-09 16:24:27,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4067 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4258, Invalid=9548, Unknown=0, NotChecked=0, Total=13806 [2020-11-09 16:24:27,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-11-09 16:24:27,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 105. [2020-11-09 16:24:27,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-11-09 16:24:27,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-11-09 16:24:27,072 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 45 [2020-11-09 16:24:27,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:24:27,073 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-11-09 16:24:27,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-11-09 16:24:27,073 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-11-09 16:24:27,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-11-09 16:24:27,073 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:24:27,073 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:24:27,285 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-11-09 16:24:27,286 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:24:27,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:24:27,286 INFO L82 PathProgramCache]: Analyzing trace with hash -610554105, now seen corresponding path program 89 times [2020-11-09 16:24:27,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:24:27,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872185090] [2020-11-09 16:24:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:24:27,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:28,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872185090] [2020-11-09 16:24:28,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690300995] [2020-11-09 16:24:28,427 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 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 [2020-11-09 16:24:28,532 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2020-11-09 16:24:28,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:24:28,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 41 conjunts are in the unsatisfiable core [2020-11-09 16:24:28,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:24:28,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:24:28,652 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:28,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:24:28,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2020-11-09 16:24:28,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2007347078] [2020-11-09 16:24:28,653 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:24:28,657 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:24:28,674 INFO L252 McrAutomatonBuilder]: Finished intersection with 52 states and 57 transitions. [2020-11-09 16:24:28,675 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:24:28,689 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:24:28,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-09 16:24:28,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:28,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-09 16:24:28,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=409, Invalid=1313, Unknown=0, NotChecked=0, Total=1722 [2020-11-09 16:24:28,690 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 41 states. [2020-11-09 16:24:33,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:24:33,440 INFO L93 Difference]: Finished difference Result 192 states and 473 transitions. [2020-11-09 16:24:33,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-11-09 16:24:33,441 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 45 [2020-11-09 16:24:33,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:24:33,443 INFO L225 Difference]: With dead ends: 192 [2020-11-09 16:24:33,443 INFO L226 Difference]: Without dead ends: 187 [2020-11-09 16:24:33,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3669 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=4032, Invalid=9078, Unknown=0, NotChecked=0, Total=13110 [2020-11-09 16:24:33,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-11-09 16:24:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 145. [2020-11-09 16:24:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-11-09 16:24:33,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 377 transitions. [2020-11-09 16:24:33,447 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 377 transitions. Word has length 45 [2020-11-09 16:24:33,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:24:33,448 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 377 transitions. [2020-11-09 16:24:33,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-09 16:24:33,448 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 377 transitions. [2020-11-09 16:24:33,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-09 16:24:33,448 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:24:33,448 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:24:33,650 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:24:33,650 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:24:33,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:24:33,651 INFO L82 PathProgramCache]: Analyzing trace with hash 963507588, now seen corresponding path program 90 times [2020-11-09 16:24:33,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:24:33,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588971525] [2020-11-09 16:24:33,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:24:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:35,143 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:35,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588971525] [2020-11-09 16:24:35,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032899586] [2020-11-09 16:24:35,144 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 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 [2020-11-09 16:24:35,254 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2020-11-09 16:24:35,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-09 16:24:35,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 43 conjunts are in the unsatisfiable core [2020-11-09 16:24:35,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:24:35,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:24:35,280 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:35,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:24:35,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2020-11-09 16:24:35,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [297563093] [2020-11-09 16:24:35,281 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:24:35,285 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:24:35,307 INFO L252 McrAutomatonBuilder]: Finished intersection with 54 states and 61 transitions. [2020-11-09 16:24:35,307 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:24:35,308 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:24:35,308 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:24:35,378 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:24:35,379 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:24:35,458 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-11-09 16:24:35,458 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-11-09 16:24:35,509 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [43480#(and (<= ~j~0 6) (< ~i~0 46))] [2020-11-09 16:24:35,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-09 16:24:35,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:35,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-09 16:24:35,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=445, Invalid=1361, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 16:24:35,510 INFO L87 Difference]: Start difference. First operand 145 states and 377 transitions. Second operand 43 states. [2020-11-09 16:24:37,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-09 16:24:37,950 INFO L93 Difference]: Finished difference Result 192 states and 471 transitions. [2020-11-09 16:24:37,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-09 16:24:37,951 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 46 [2020-11-09 16:24:37,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-09 16:24:37,952 INFO L225 Difference]: With dead ends: 192 [2020-11-09 16:24:37,953 INFO L226 Difference]: Without dead ends: 186 [2020-11-09 16:24:37,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1233 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=2110, Invalid=4696, Unknown=0, NotChecked=0, Total=6806 [2020-11-09 16:24:37,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-11-09 16:24:37,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 149. [2020-11-09 16:24:37,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-11-09 16:24:37,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 385 transitions. [2020-11-09 16:24:37,957 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 385 transitions. Word has length 46 [2020-11-09 16:24:37,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-09 16:24:37,957 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 385 transitions. [2020-11-09 16:24:37,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-09 16:24:37,958 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 385 transitions. [2020-11-09 16:24:37,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-11-09 16:24:37,958 INFO L414 BasicCegarLoop]: Found error trace [2020-11-09 16:24:37,958 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-09 16:24:38,167 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:24:38,167 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-09 16:24:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-09 16:24:38,168 INFO L82 PathProgramCache]: Analyzing trace with hash 64786326, now seen corresponding path program 91 times [2020-11-09 16:24:38,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-09 16:24:38,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796965202] [2020-11-09 16:24:38,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-09 16:24:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:39,370 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:39,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796965202] [2020-11-09 16:24:39,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784948805] [2020-11-09 16:24:39,371 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 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 [2020-11-09 16:24:39,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-09 16:24:39,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 42 conjunts are in the unsatisfiable core [2020-11-09 16:24:39,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-09 16:24:39,525 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-09 16:24:39,579 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-09 16:24:39,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-09 16:24:39,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2020-11-09 16:24:39,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [189556366] [2020-11-09 16:24:39,580 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-11-09 16:24:39,584 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-11-09 16:24:39,603 INFO L252 McrAutomatonBuilder]: Finished intersection with 51 states and 54 transitions. [2020-11-09 16:24:39,603 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-11-09 16:24:39,609 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-11-09 16:24:39,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-11-09 16:24:39,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-09 16:24:39,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-11-09 16:24:39,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=1377, Unknown=0, NotChecked=0, Total=1806 [2020-11-09 16:24:39,610 INFO L87 Difference]: Start difference. First operand 149 states and 385 transitions. Second operand 42 states. Received shutdown request... [2020-11-09 16:24:43,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-11-09 16:24:43,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-09 16:24:43,213 WARN L546 AbstractCegarLoop]: Verification canceled [2020-11-09 16:24:43,217 WARN L250 ceAbstractionStarter]: Timeout [2020-11-09 16:24:43,217 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.11 04:24:43 BasicIcfg [2020-11-09 16:24:43,217 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-09 16:24:43,218 INFO L168 Benchmark]: Toolchain (without parser) took 241571.14 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 125.2 MB in the beginning and 233.1 MB in the end (delta: -107.9 MB). Peak memory consumption was 56.1 MB. Max. memory is 8.0 GB. [2020-11-09 16:24:43,219 INFO L168 Benchmark]: CDTParser took 0.73 ms. Allocated memory is still 151.0 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-11-09 16:24:43,220 INFO L168 Benchmark]: CACSL2BoogieTranslator took 673.65 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 130.7 MB in the end (delta: -6.1 MB). Peak memory consumption was 29.8 MB. Max. memory is 8.0 GB. [2020-11-09 16:24:43,220 INFO L168 Benchmark]: Boogie Procedure Inliner took 48.94 ms. Allocated memory is still 151.0 MB. Free memory was 130.7 MB in the beginning and 128.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-11-09 16:24:43,221 INFO L168 Benchmark]: Boogie Preprocessor took 39.16 ms. Allocated memory is still 151.0 MB. Free memory was 128.6 MB in the beginning and 127.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-11-09 16:24:43,221 INFO L168 Benchmark]: RCFGBuilder took 546.85 ms. Allocated memory is still 151.0 MB. Free memory was 127.5 MB in the beginning and 107.1 MB in the end (delta: 20.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-11-09 16:24:43,222 INFO L168 Benchmark]: TraceAbstraction took 240250.62 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 107.1 MB in the beginning and 233.1 MB in the end (delta: -126.0 MB). Peak memory consumption was 37.9 MB. Max. memory is 8.0 GB. [2020-11-09 16:24:43,223 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.73 ms. Allocated memory is still 151.0 MB. Free memory is still 123.1 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 673.65 ms. Allocated memory is still 151.0 MB. Free memory was 124.6 MB in the beginning and 130.7 MB in the end (delta: -6.1 MB). Peak memory consumption was 29.8 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 48.94 ms. Allocated memory is still 151.0 MB. Free memory was 130.7 MB in the beginning and 128.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 39.16 ms. Allocated memory is still 151.0 MB. Free memory was 128.6 MB in the beginning and 127.5 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 546.85 ms. Allocated memory is still 151.0 MB. Free memory was 127.5 MB in the beginning and 107.1 MB in the end (delta: 20.4 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 240250.62 ms. Allocated memory was 151.0 MB in the beginning and 314.6 MB in the end (delta: 163.6 MB). Free memory was 107.1 MB in the beginning and 233.1 MB in the end (delta: -126.0 MB). Peak memory consumption was 37.9 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 637 VarBasedMoverChecksPositive, 12 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 15 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.4s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 7 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 11 ConcurrentYvCompositions, 3 ChoiceCompositions, 62 TotalNumberOfCompositions, 1187 MoverChecksTotal - TimeoutResultAtElement [Line: 685]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 685). Cancelled while BasicCegarLoop was constructing difference of abstraction (149states) and FLOYD_HOARE automaton (currently 62 states, 42 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 103 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 240.1s, OverallIterations: 93, TraceHistogramMax: 19, AutomataDifference: 155.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.4s, HoareTripleCheckerStatistics: 1313 SDtfs, 8056 SDslu, 10497 SDs, 0 SdLazy, 12067 SolverSat, 9312 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 18.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 8264 GetRequests, 2737 SyntacticMatches, 110 SemanticMatches, 5416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111496 ImplicationChecksByTransitivity, 171.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=149occurred in iteration=92, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 92 MinimizatonAttempts, 3949 StatesRemovedByMinimization, 91 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.3s SsaConstructionTime, 3.8s SatisfiabilityAnalysisTime, 46.2s InterpolantComputationTime, 5090 NumberOfCodeBlocks, 5090 NumberOfCodeBlocksAsserted, 631 NumberOfCheckSat, 4908 ConstructedInterpolants, 0 QuantifiedInterpolants, 621960 SizeOfPredicates, 1834 NumberOfNonLiveVariables, 16022 ConjunctsInSsa, 2201 ConjunctsInUnsatCore, 182 InterpolantComputations, 4 PerfectInterpolantSequences, 0/21432 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown