/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-178dd20 [2021-01-06 22:57:52,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-01-06 22:57:52,021 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-01-06 22:57:52,083 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-01-06 22:57:52,084 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-01-06 22:57:52,088 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-01-06 22:57:52,092 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-01-06 22:57:52,098 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-01-06 22:57:52,102 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-01-06 22:57:52,104 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-01-06 22:57:52,110 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-01-06 22:57:52,114 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-01-06 22:57:52,114 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-01-06 22:57:52,120 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-01-06 22:57:52,124 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-01-06 22:57:52,126 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-01-06 22:57:52,128 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-01-06 22:57:52,132 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-01-06 22:57:52,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-01-06 22:57:52,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-01-06 22:57:52,147 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-01-06 22:57:52,150 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-01-06 22:57:52,152 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-01-06 22:57:52,155 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-01-06 22:57:52,167 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-01-06 22:57:52,168 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-01-06 22:57:52,168 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-01-06 22:57:52,171 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-01-06 22:57:52,172 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-01-06 22:57:52,174 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-01-06 22:57:52,175 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-01-06 22:57:52,176 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-01-06 22:57:52,179 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-01-06 22:57:52,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-01-06 22:57:52,196 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-01-06 22:57:52,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-01-06 22:57:52,197 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-01-06 22:57:52,201 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-01-06 22:57:52,202 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-01-06 22:57:52,204 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-01-06 22:57:52,205 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-01-06 22:57:52,206 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2021-01-06 22:57:52,234 INFO L113 SettingsManager]: Loading preferences was successful [2021-01-06 22:57:52,234 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-01-06 22:57:52,236 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-01-06 22:57:52,236 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-01-06 22:57:52,236 INFO L138 SettingsManager]: * Use SBE=true [2021-01-06 22:57:52,237 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-01-06 22:57:52,237 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-01-06 22:57:52,237 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-01-06 22:57:52,238 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-01-06 22:57:52,238 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-01-06 22:57:52,238 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-01-06 22:57:52,239 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-01-06 22:57:52,239 INFO L138 SettingsManager]: * Use constant arrays=true [2021-01-06 22:57:52,239 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-01-06 22:57:52,239 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-01-06 22:57:52,240 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-01-06 22:57:52,240 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-01-06 22:57:52,240 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-01-06 22:57:52,241 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-01-06 22:57:52,241 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-01-06 22:57:52,241 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-01-06 22:57:52,241 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-01-06 22:57:52,241 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-01-06 22:57:52,242 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-01-06 22:57:52,242 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-01-06 22:57:52,242 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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-bitabs/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-01-06 22:57:52,658 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-01-06 22:57:52,716 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-01-06 22:57:52,719 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-01-06 22:57:52,720 INFO L271 PluginConnector]: Initializing CDTParser... [2021-01-06 22:57:52,721 INFO L275 PluginConnector]: CDTParser initialized [2021-01-06 22:57:52,722 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longer-1.i [2021-01-06 22:57:52,812 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b9cfb04e/95070ca73e334ab1bca4b12ba93da871/FLAG00a503a6d [2021-01-06 22:57:53,721 INFO L306 CDTParser]: Found 1 translation units. [2021-01-06 22:57:53,722 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i [2021-01-06 22:57:53,743 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b9cfb04e/95070ca73e334ab1bca4b12ba93da871/FLAG00a503a6d [2021-01-06 22:57:53,925 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/9b9cfb04e/95070ca73e334ab1bca4b12ba93da871 [2021-01-06 22:57:53,928 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-01-06 22:57:53,931 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-01-06 22:57:53,935 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-01-06 22:57:53,936 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-01-06 22:57:53,940 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-01-06 22:57:53,941 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:57:53" (1/1) ... [2021-01-06 22:57:53,943 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15db191 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:53, skipping insertion in model container [2021-01-06 22:57:53,943 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.01 10:57:53" (1/1) ... [2021-01-06 22:57:53,953 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-01-06 22:57:53,995 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~j~0,GLOBAL] [2021-01-06 22:57:54,358 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2021-01-06 22:57:54,366 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 22:57:54,379 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~i~0,GLOBAL] left hand side expression in assignment: lhs: VariableLHS[~j~0,GLOBAL] [2021-01-06 22:57:54,472 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2021-01-06 22:57:54,481 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-01-06 22:57:54,589 INFO L208 MainTranslator]: Completed translation [2021-01-06 22:57:54,590 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:54 WrapperNode [2021-01-06 22:57:54,590 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-01-06 22:57:54,592 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-01-06 22:57:54,594 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-01-06 22:57:54,594 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-01-06 22:57:54,603 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:54" (1/1) ... [2021-01-06 22:57:54,623 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:54" (1/1) ... [2021-01-06 22:57:54,647 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-01-06 22:57:54,648 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-01-06 22:57:54,648 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-01-06 22:57:54,648 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-01-06 22:57:54,658 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:54" (1/1) ... [2021-01-06 22:57:54,659 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:54" (1/1) ... [2021-01-06 22:57:54,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:54" (1/1) ... [2021-01-06 22:57:54,663 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:54" (1/1) ... [2021-01-06 22:57:54,670 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:54" (1/1) ... [2021-01-06 22:57:54,674 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:54" (1/1) ... [2021-01-06 22:57:54,677 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:54" (1/1) ... [2021-01-06 22:57:54,680 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-01-06 22:57:54,681 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-01-06 22:57:54,682 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-01-06 22:57:54,682 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-01-06 22:57:54,683 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:54" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:57:54,826 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2021-01-06 22:57:54,827 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2021-01-06 22:57:54,827 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2021-01-06 22:57:54,827 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2021-01-06 22:57:54,827 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-01-06 22:57:54,827 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-01-06 22:57:54,828 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-01-06 22:57:54,828 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-01-06 22:57:54,828 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-01-06 22:57:54,829 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-01-06 22:57:54,830 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-01-06 22:57:54,831 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-01-06 22:57:54,833 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-01-06 22:57:55,237 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-01-06 22:57:55,238 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2021-01-06 22:57:55,240 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:57:55 BoogieIcfgContainer [2021-01-06 22:57:55,241 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-01-06 22:57:55,242 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-01-06 22:57:55,243 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-01-06 22:57:55,246 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-01-06 22:57:55,247 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.01 10:57:53" (1/3) ... [2021-01-06 22:57:55,248 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e10955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:57:55, skipping insertion in model container [2021-01-06 22:57:55,248 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.01 10:57:54" (2/3) ... [2021-01-06 22:57:55,249 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32e10955 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.01 10:57:55, skipping insertion in model container [2021-01-06 22:57:55,249 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:57:55" (3/3) ... [2021-01-06 22:57:55,251 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2021-01-06 22:57:55,260 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-01-06 22:57:55,260 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-01-06 22:57:55,269 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-01-06 22:57:55,272 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-01-06 22:57:55,359 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,360 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,360 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,361 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,362 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,362 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,362 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,362 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,363 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,363 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,363 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,364 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,364 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,364 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,364 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,365 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,367 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,367 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,368 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,368 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,369 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,372 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,373 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,373 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,373 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,373 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,374 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,374 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,374 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,375 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,375 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,377 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,378 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,378 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,378 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,379 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,379 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,379 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,380 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,380 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,380 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,380 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,381 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,385 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,386 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,386 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,387 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,387 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,387 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,387 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,388 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,388 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,390 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,390 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,390 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,390 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,396 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,398 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,399 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,399 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,399 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,399 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,414 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,415 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,415 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,415 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,415 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,415 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-01-06 22:57:55,418 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-01-06 22:57:55,442 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-01-06 22:57:55,470 INFO L377 AbstractCegarLoop]: Interprodecural is true [2021-01-06 22:57:55,470 INFO L378 AbstractCegarLoop]: Hoare is true [2021-01-06 22:57:55,470 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-01-06 22:57:55,470 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-01-06 22:57:55,471 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-01-06 22:57:55,471 INFO L382 AbstractCegarLoop]: Difference is false [2021-01-06 22:57:55,471 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-01-06 22:57:55,471 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-01-06 22:57:55,486 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-01-06 22:57:55,489 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 60 transitions, 130 flow [2021-01-06 22:57:55,493 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 60 transitions, 130 flow [2021-01-06 22:57:55,495 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 62 places, 60 transitions, 130 flow [2021-01-06 22:57:55,540 INFO L129 PetriNetUnfolder]: 5/58 cut-off events. [2021-01-06 22:57:55,540 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-01-06 22:57:55,549 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 58 events. 5/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2021-01-06 22:57:55,552 INFO L116 LiptonReduction]: Number of co-enabled transitions 968 [2021-01-06 22:57:57,688 WARN L197 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-01-06 22:57:57,873 WARN L197 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2021-01-06 22:57:58,539 WARN L197 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2021-01-06 22:57:58,711 WARN L197 SmtUtils]: Spent 170.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-01-06 22:57:58,987 WARN L197 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2021-01-06 22:57:59,121 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2021-01-06 22:57:59,152 INFO L131 LiptonReduction]: Checked pairs total: 998 [2021-01-06 22:57:59,152 INFO L133 LiptonReduction]: Total number of compositions: 52 [2021-01-06 22:57:59,160 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2021-01-06 22:57:59,170 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2021-01-06 22:57:59,172 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2021-01-06 22:57:59,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-01-06 22:57:59,179 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:57:59,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-01-06 22:57:59,180 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:57:59,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:57:59,186 INFO L82 PathProgramCache]: Analyzing trace with hash -1332860337, now seen corresponding path program 1 times [2021-01-06 22:57:59,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:57:59,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700131844] [2021-01-06 22:57:59,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:57:59,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:57:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:57:59,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700131844] [2021-01-06 22:57:59,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:57:59,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-01-06 22:57:59,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929975960] [2021-01-06 22:57:59,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-01-06 22:57:59,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:57:59,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-01-06 22:57:59,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-01-06 22:57:59,503 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2021-01-06 22:57:59,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:57:59,571 INFO L93 Difference]: Finished difference Result 59 states and 152 transitions. [2021-01-06 22:57:59,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-01-06 22:57:59,573 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2021-01-06 22:57:59,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:57:59,586 INFO L225 Difference]: With dead ends: 59 [2021-01-06 22:57:59,587 INFO L226 Difference]: Without dead ends: 38 [2021-01-06 22:57:59,588 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 [2021-01-06 22:57:59,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-01-06 22:57:59,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-01-06 22:57:59,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 22:57:59,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2021-01-06 22:57:59,630 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 6 [2021-01-06 22:57:59,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:57:59,631 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2021-01-06 22:57:59,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2021-01-06 22:57:59,631 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2021-01-06 22:57:59,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 22:57:59,632 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:57:59,632 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:57:59,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-01-06 22:57:59,632 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:57:59,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:57:59,633 INFO L82 PathProgramCache]: Analyzing trace with hash -978539367, now seen corresponding path program 1 times [2021-01-06 22:57:59,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:57:59,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267144128] [2021-01-06 22:57:59,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:57:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:57:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:57:59,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267144128] [2021-01-06 22:57:59,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:57:59,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 22:57:59,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502679409] [2021-01-06 22:57:59,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 22:57:59,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:57:59,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 22:57:59,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:57:59,760 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 5 states. [2021-01-06 22:57:59,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:57:59,832 INFO L93 Difference]: Finished difference Result 82 states and 192 transitions. [2021-01-06 22:57:59,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-01-06 22:57:59,833 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 22:57:59,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:57:59,840 INFO L225 Difference]: With dead ends: 82 [2021-01-06 22:57:59,840 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 22:57:59,842 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:57:59,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 22:57:59,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2021-01-06 22:57:59,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 22:57:59,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2021-01-06 22:57:59,860 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 8 [2021-01-06 22:57:59,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:57:59,860 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2021-01-06 22:57:59,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 22:57:59,860 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2021-01-06 22:57:59,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-01-06 22:57:59,861 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:57:59,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:57:59,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-01-06 22:57:59,862 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:57:59,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:57:59,863 INFO L82 PathProgramCache]: Analyzing trace with hash -978459387, now seen corresponding path program 2 times [2021-01-06 22:57:59,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:57:59,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644010003] [2021-01-06 22:57:59,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:57:59,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:57:59,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:57:59,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644010003] [2021-01-06 22:57:59,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:57:59,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-01-06 22:57:59,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798375745] [2021-01-06 22:57:59,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-01-06 22:57:59,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:57:59,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-01-06 22:57:59,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-01-06 22:57:59,949 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 5 states. [2021-01-06 22:58:00,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:00,061 INFO L93 Difference]: Finished difference Result 70 states and 163 transitions. [2021-01-06 22:58:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:58:00,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2021-01-06 22:58:00,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:00,066 INFO L225 Difference]: With dead ends: 70 [2021-01-06 22:58:00,066 INFO L226 Difference]: Without dead ends: 54 [2021-01-06 22:58:00,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-01-06 22:58:00,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-01-06 22:58:00,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2021-01-06 22:58:00,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 22:58:00,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 90 transitions. [2021-01-06 22:58:00,087 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 90 transitions. Word has length 8 [2021-01-06 22:58:00,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:00,088 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 90 transitions. [2021-01-06 22:58:00,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2021-01-06 22:58:00,088 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 90 transitions. [2021-01-06 22:58:00,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:58:00,091 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:00,091 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:00,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-01-06 22:58:00,091 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:00,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:00,093 INFO L82 PathProgramCache]: Analyzing trace with hash 220478720, now seen corresponding path program 1 times [2021-01-06 22:58:00,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:00,094 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858994067] [2021-01-06 22:58:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:00,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:00,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:00,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858994067] [2021-01-06 22:58:00,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:58:00,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:58:00,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786771843] [2021-01-06 22:58:00,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:58:00,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:00,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:58:00,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:58:00,236 INFO L87 Difference]: Start difference. First operand 38 states and 90 transitions. Second operand 6 states. [2021-01-06 22:58:00,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:00,300 INFO L93 Difference]: Finished difference Result 58 states and 134 transitions. [2021-01-06 22:58:00,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:58:00,301 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:58:00,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:00,302 INFO L225 Difference]: With dead ends: 58 [2021-01-06 22:58:00,302 INFO L226 Difference]: Without dead ends: 51 [2021-01-06 22:58:00,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:58:00,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-01-06 22:58:00,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2021-01-06 22:58:00,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2021-01-06 22:58:00,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2021-01-06 22:58:00,309 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 10 [2021-01-06 22:58:00,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:00,309 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2021-01-06 22:58:00,309 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:58:00,309 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2021-01-06 22:58:00,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:58:00,310 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:00,310 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:00,310 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-01-06 22:58:00,311 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:00,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:00,311 INFO L82 PathProgramCache]: Analyzing trace with hash 266866190, now seen corresponding path program 2 times [2021-01-06 22:58:00,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:00,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586714916] [2021-01-06 22:58:00,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:00,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:00,374 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586714916] [2021-01-06 22:58:00,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:58:00,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:58:00,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603623089] [2021-01-06 22:58:00,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:58:00,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:00,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:58:00,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:58:00,377 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 6 states. [2021-01-06 22:58:00,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:00,442 INFO L93 Difference]: Finished difference Result 78 states and 182 transitions. [2021-01-06 22:58:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 22:58:00,442 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:58:00,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:00,444 INFO L225 Difference]: With dead ends: 78 [2021-01-06 22:58:00,444 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 22:58:00,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:58:00,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 22:58:00,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2021-01-06 22:58:00,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 22:58:00,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 115 transitions. [2021-01-06 22:58:00,451 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 115 transitions. Word has length 10 [2021-01-06 22:58:00,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:00,453 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 115 transitions. [2021-01-06 22:58:00,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:58:00,453 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 115 transitions. [2021-01-06 22:58:00,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-01-06 22:58:00,454 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:00,454 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:00,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-01-06 22:58:00,455 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:00,455 INFO L82 PathProgramCache]: Analyzing trace with hash 266888510, now seen corresponding path program 3 times [2021-01-06 22:58:00,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:00,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563579044] [2021-01-06 22:58:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:00,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:00,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:00,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563579044] [2021-01-06 22:58:00,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-01-06 22:58:00,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-01-06 22:58:00,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954931657] [2021-01-06 22:58:00,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-01-06 22:58:00,535 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:00,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-01-06 22:58:00,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-01-06 22:58:00,537 INFO L87 Difference]: Start difference. First operand 46 states and 115 transitions. Second operand 6 states. [2021-01-06 22:58:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:00,617 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2021-01-06 22:58:00,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-01-06 22:58:00,622 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2021-01-06 22:58:00,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:00,623 INFO L225 Difference]: With dead ends: 56 [2021-01-06 22:58:00,623 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 22:58:00,624 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:58:00,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 22:58:00,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2021-01-06 22:58:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2021-01-06 22:58:00,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2021-01-06 22:58:00,630 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2021-01-06 22:58:00,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:00,631 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2021-01-06 22:58:00,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2021-01-06 22:58:00,631 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2021-01-06 22:58:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:58:00,631 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:00,632 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:00,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-01-06 22:58:00,634 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:00,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1755209235, now seen corresponding path program 4 times [2021-01-06 22:58:00,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:00,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323737141] [2021-01-06 22:58:00,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:00,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:00,710 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:00,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323737141] [2021-01-06 22:58:00,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072542069] [2021-01-06 22:58:00,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:00,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:00,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:00,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:58:00,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:00,898 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:00,899 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:00,899 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 22:58:00,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711205955] [2021-01-06 22:58:00,900 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 22:58:00,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:00,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 22:58:00,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 22:58:00,901 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2021-01-06 22:58:01,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:01,034 INFO L93 Difference]: Finished difference Result 55 states and 127 transitions. [2021-01-06 22:58:01,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 22:58:01,037 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2021-01-06 22:58:01,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:01,038 INFO L225 Difference]: With dead ends: 55 [2021-01-06 22:58:01,038 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 22:58:01,039 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:58:01,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 22:58:01,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-01-06 22:58:01,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 22:58:01,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2021-01-06 22:58:01,051 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 11 [2021-01-06 22:58:01,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:01,052 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2021-01-06 22:58:01,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 22:58:01,055 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2021-01-06 22:58:01,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:58:01,056 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:01,056 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:01,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-01-06 22:58:01,258 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:01,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:01,259 INFO L82 PathProgramCache]: Analyzing trace with hash -316364261, now seen corresponding path program 5 times [2021-01-06 22:58:01,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:01,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301543245] [2021-01-06 22:58:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:01,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:01,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301543245] [2021-01-06 22:58:01,331 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100464636] [2021-01-06 22:58:01,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:01,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:01,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:01,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:58:01,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:01,447 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:58:01,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:01,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:01,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 22:58:01,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172033770] [2021-01-06 22:58:01,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 22:58:01,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:01,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 22:58:01,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-01-06 22:58:01,456 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 8 states. [2021-01-06 22:58:01,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:01,547 INFO L93 Difference]: Finished difference Result 57 states and 135 transitions. [2021-01-06 22:58:01,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-01-06 22:58:01,548 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2021-01-06 22:58:01,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:01,549 INFO L225 Difference]: With dead ends: 57 [2021-01-06 22:58:01,549 INFO L226 Difference]: Without dead ends: 52 [2021-01-06 22:58:01,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:01,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-01-06 22:58:01,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2021-01-06 22:58:01,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 22:58:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2021-01-06 22:58:01,554 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2021-01-06 22:58:01,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:01,554 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2021-01-06 22:58:01,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 22:58:01,555 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2021-01-06 22:58:01,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:58:01,555 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:01,556 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:01,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:01,769 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:01,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:01,770 INFO L82 PathProgramCache]: Analyzing trace with hash -319965345, now seen corresponding path program 6 times [2021-01-06 22:58:01,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:01,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335645087] [2021-01-06 22:58:01,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:01,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:01,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:01,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335645087] [2021-01-06 22:58:01,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979631168] [2021-01-06 22:58:01,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:01,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-01-06 22:58:01,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:01,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:58:01,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:02,008 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:02,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:02,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 22:58:02,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160003165] [2021-01-06 22:58:02,010 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 22:58:02,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:02,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 22:58:02,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 22:58:02,012 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2021-01-06 22:58:02,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:02,133 INFO L93 Difference]: Finished difference Result 80 states and 187 transitions. [2021-01-06 22:58:02,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:58:02,133 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2021-01-06 22:58:02,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:02,135 INFO L225 Difference]: With dead ends: 80 [2021-01-06 22:58:02,135 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 22:58:02,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:02,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 22:58:02,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 46. [2021-01-06 22:58:02,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 22:58:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2021-01-06 22:58:02,153 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2021-01-06 22:58:02,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:02,154 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2021-01-06 22:58:02,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 22:58:02,154 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2021-01-06 22:58:02,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-01-06 22:58:02,155 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:02,155 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:02,369 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:02,370 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:02,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:02,371 INFO L82 PathProgramCache]: Analyzing trace with hash -319943025, now seen corresponding path program 7 times [2021-01-06 22:58:02,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:02,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748976053] [2021-01-06 22:58:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:02,446 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:02,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748976053] [2021-01-06 22:58:02,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638278080] [2021-01-06 22:58:02,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:02,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:02,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2021-01-06 22:58:02,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:02,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:02,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:02,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-01-06 22:58:02,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404549037] [2021-01-06 22:58:02,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 22:58:02,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:02,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 22:58:02,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 22:58:02,531 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2021-01-06 22:58:02,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:02,720 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2021-01-06 22:58:02,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:58:02,720 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2021-01-06 22:58:02,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:02,721 INFO L225 Difference]: With dead ends: 64 [2021-01-06 22:58:02,721 INFO L226 Difference]: Without dead ends: 53 [2021-01-06 22:58:02,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:02,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-01-06 22:58:02,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2021-01-06 22:58:02,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2021-01-06 22:58:02,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2021-01-06 22:58:02,725 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2021-01-06 22:58:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:02,725 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2021-01-06 22:58:02,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 22:58:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2021-01-06 22:58:02,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:58:02,726 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:02,726 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:02,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:02,942 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:02,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:02,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1426667684, now seen corresponding path program 8 times [2021-01-06 22:58:02,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:02,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123669294] [2021-01-06 22:58:02,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:02,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:03,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123669294] [2021-01-06 22:58:03,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696994465] [2021-01-06 22:58:03,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:03,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:03,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:03,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:58:03,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:03,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:03,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:03,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 22:58:03,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620763261] [2021-01-06 22:58:03,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:58:03,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:03,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:58:03,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:58:03,187 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2021-01-06 22:58:03,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:03,311 INFO L93 Difference]: Finished difference Result 51 states and 117 transitions. [2021-01-06 22:58:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-01-06 22:58:03,312 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2021-01-06 22:58:03,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:03,313 INFO L225 Difference]: With dead ends: 51 [2021-01-06 22:58:03,313 INFO L226 Difference]: Without dead ends: 45 [2021-01-06 22:58:03,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:03,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-01-06 22:58:03,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2021-01-06 22:58:03,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2021-01-06 22:58:03,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2021-01-06 22:58:03,321 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 12 [2021-01-06 22:58:03,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:03,321 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2021-01-06 22:58:03,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:58:03,321 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2021-01-06 22:58:03,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:58:03,327 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:03,327 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:03,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-01-06 22:58:03,543 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:03,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:03,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1239613902, now seen corresponding path program 9 times [2021-01-06 22:58:03,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:03,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13626076] [2021-01-06 22:58:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:03,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:03,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13626076] [2021-01-06 22:58:03,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957216419] [2021-01-06 22:58:03,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:03,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-01-06 22:58:03,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:03,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:58:03,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:03,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:03,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:03,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-01-06 22:58:03,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630955108] [2021-01-06 22:58:03,713 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 22:58:03,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:03,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 22:58:03,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 22:58:03,716 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 8 states. [2021-01-06 22:58:03,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:03,798 INFO L93 Difference]: Finished difference Result 72 states and 163 transitions. [2021-01-06 22:58:03,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-01-06 22:58:03,799 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2021-01-06 22:58:03,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:03,800 INFO L225 Difference]: With dead ends: 72 [2021-01-06 22:58:03,800 INFO L226 Difference]: Without dead ends: 66 [2021-01-06 22:58:03,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:03,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-01-06 22:58:03,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2021-01-06 22:58:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 22:58:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2021-01-06 22:58:03,804 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2021-01-06 22:58:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:03,804 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2021-01-06 22:58:03,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 22:58:03,805 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2021-01-06 22:58:03,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:58:03,805 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:03,805 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:04,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:04,020 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:04,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:04,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1217357142, now seen corresponding path program 10 times [2021-01-06 22:58:04,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:04,022 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745538022] [2021-01-06 22:58:04,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:04,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:04,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:04,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745538022] [2021-01-06 22:58:04,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403580087] [2021-01-06 22:58:04,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:04,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:04,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:04,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:58:04,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:04,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:04,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-01-06 22:58:04,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489237609] [2021-01-06 22:58:04,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-01-06 22:58:04,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:04,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-01-06 22:58:04,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2021-01-06 22:58:04,188 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 8 states. [2021-01-06 22:58:04,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:04,307 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2021-01-06 22:58:04,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:58:04,308 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2021-01-06 22:58:04,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:04,310 INFO L225 Difference]: With dead ends: 87 [2021-01-06 22:58:04,310 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 22:58:04,310 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 22:58:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 51. [2021-01-06 22:58:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 22:58:04,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 129 transitions. [2021-01-06 22:58:04,315 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 129 transitions. Word has length 12 [2021-01-06 22:58:04,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:04,315 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 129 transitions. [2021-01-06 22:58:04,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2021-01-06 22:58:04,315 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 129 transitions. [2021-01-06 22:58:04,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-01-06 22:58:04,316 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:04,316 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:04,530 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:04,531 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:04,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:04,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1217334822, now seen corresponding path program 11 times [2021-01-06 22:58:04,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:04,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1733112871] [2021-01-06 22:58:04,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:04,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:04,604 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:04,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1733112871] [2021-01-06 22:58:04,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929650354] [2021-01-06 22:58:04,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:04,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:04,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:04,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2021-01-06 22:58:04,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:04,691 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:04,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:04,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-01-06 22:58:04,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904047329] [2021-01-06 22:58:04,693 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-01-06 22:58:04,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:04,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-01-06 22:58:04,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-01-06 22:58:04,694 INFO L87 Difference]: Start difference. First operand 51 states and 129 transitions. Second operand 9 states. [2021-01-06 22:58:04,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:04,904 INFO L93 Difference]: Finished difference Result 71 states and 169 transitions. [2021-01-06 22:58:04,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:58:04,904 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2021-01-06 22:58:04,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:04,905 INFO L225 Difference]: With dead ends: 71 [2021-01-06 22:58:04,906 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 22:58:04,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:58:04,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 22:58:04,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2021-01-06 22:58:04,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 22:58:04,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2021-01-06 22:58:04,910 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 12 [2021-01-06 22:58:04,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:04,911 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2021-01-06 22:58:04,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2021-01-06 22:58:04,911 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2021-01-06 22:58:04,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:58:04,913 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:04,913 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:05,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-01-06 22:58:05,128 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:05,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:05,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1750964035, now seen corresponding path program 12 times [2021-01-06 22:58:05,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:05,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353210623] [2021-01-06 22:58:05,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:05,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353210623] [2021-01-06 22:58:05,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488952284] [2021-01-06 22:58:05,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:05,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:58:05,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:05,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:58:05,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:05,319 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:05,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:05,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 22:58:05,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368680483] [2021-01-06 22:58:05,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:58:05,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:05,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:58:05,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:58:05,321 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2021-01-06 22:58:05,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:05,445 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2021-01-06 22:58:05,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:58:05,446 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2021-01-06 22:58:05,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:05,447 INFO L225 Difference]: With dead ends: 67 [2021-01-06 22:58:05,447 INFO L226 Difference]: Without dead ends: 61 [2021-01-06 22:58:05,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:05,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-01-06 22:58:05,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2021-01-06 22:58:05,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2021-01-06 22:58:05,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2021-01-06 22:58:05,451 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2021-01-06 22:58:05,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:05,451 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2021-01-06 22:58:05,451 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:58:05,451 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2021-01-06 22:58:05,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:58:05,452 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:05,452 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:05,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-01-06 22:58:05,666 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:05,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:05,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1773220795, now seen corresponding path program 13 times [2021-01-06 22:58:05,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:05,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82922061] [2021-01-06 22:58:05,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:05,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:05,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82922061] [2021-01-06 22:58:05,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570879104] [2021-01-06 22:58:05,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:05,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2021-01-06 22:58:05,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:05,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:05,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-01-06 22:58:05,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607299203] [2021-01-06 22:58:05,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:58:05,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:05,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:58:05,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:58:05,883 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2021-01-06 22:58:06,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:06,064 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2021-01-06 22:58:06,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:58:06,064 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2021-01-06 22:58:06,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:06,065 INFO L225 Difference]: With dead ends: 89 [2021-01-06 22:58:06,066 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 22:58:06,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:58:06,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 22:58:06,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 52. [2021-01-06 22:58:06,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 22:58:06,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2021-01-06 22:58:06,072 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2021-01-06 22:58:06,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:06,072 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2021-01-06 22:58:06,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:58:06,072 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2021-01-06 22:58:06,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-01-06 22:58:06,073 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:06,073 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:06,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-01-06 22:58:06,289 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:06,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:06,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1773243115, now seen corresponding path program 14 times [2021-01-06 22:58:06,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:06,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491444254] [2021-01-06 22:58:06,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:06,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491444254] [2021-01-06 22:58:06,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713006072] [2021-01-06 22:58:06,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:06,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:06,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:06,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:58:06,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:06,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:06,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:06,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-01-06 22:58:06,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142725461] [2021-01-06 22:58:06,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:58:06,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:06,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:58:06,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:58:06,472 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 11 states. [2021-01-06 22:58:06,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:06,796 INFO L93 Difference]: Finished difference Result 84 states and 198 transitions. [2021-01-06 22:58:06,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:58:06,797 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2021-01-06 22:58:06,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:06,798 INFO L225 Difference]: With dead ends: 84 [2021-01-06 22:58:06,798 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 22:58:06,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:58:06,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 22:58:06,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2021-01-06 22:58:06,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2021-01-06 22:58:06,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 127 transitions. [2021-01-06 22:58:06,807 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 127 transitions. Word has length 13 [2021-01-06 22:58:06,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:06,808 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 127 transitions. [2021-01-06 22:58:06,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:58:06,808 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 127 transitions. [2021-01-06 22:58:06,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:58:06,809 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:06,809 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:07,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-01-06 22:58:07,025 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:07,026 INFO L82 PathProgramCache]: Analyzing trace with hash 933092168, now seen corresponding path program 15 times [2021-01-06 22:58:07,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:07,027 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635008701] [2021-01-06 22:58:07,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:07,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:07,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635008701] [2021-01-06 22:58:07,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399685549] [2021-01-06 22:58:07,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:07,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-01-06 22:58:07,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:07,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:58:07,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:07,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:07,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:07,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-01-06 22:58:07,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3034931] [2021-01-06 22:58:07,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:58:07,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:07,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:58:07,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:58:07,239 INFO L87 Difference]: Start difference. First operand 51 states and 127 transitions. Second operand 11 states. [2021-01-06 22:58:07,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:07,398 INFO L93 Difference]: Finished difference Result 66 states and 157 transitions. [2021-01-06 22:58:07,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:58:07,398 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2021-01-06 22:58:07,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:07,399 INFO L225 Difference]: With dead ends: 66 [2021-01-06 22:58:07,399 INFO L226 Difference]: Without dead ends: 60 [2021-01-06 22:58:07,400 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:58:07,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-01-06 22:58:07,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2021-01-06 22:58:07,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 22:58:07,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2021-01-06 22:58:07,403 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 14 [2021-01-06 22:58:07,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:07,403 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2021-01-06 22:58:07,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:58:07,403 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2021-01-06 22:58:07,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:58:07,404 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:07,404 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:07,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-01-06 22:58:07,618 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:07,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:07,618 INFO L82 PathProgramCache]: Analyzing trace with hash -1563003562, now seen corresponding path program 16 times [2021-01-06 22:58:07,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:07,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126640767] [2021-01-06 22:58:07,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:07,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:07,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:07,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126640767] [2021-01-06 22:58:07,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927171882] [2021-01-06 22:58:07,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:07,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:07,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:07,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:58:07,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:07,785 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:07,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:07,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-01-06 22:58:07,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598508092] [2021-01-06 22:58:07,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:58:07,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:07,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:58:07,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:58:07,788 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 10 states. [2021-01-06 22:58:07,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:07,920 INFO L93 Difference]: Finished difference Result 87 states and 199 transitions. [2021-01-06 22:58:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-01-06 22:58:07,921 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-01-06 22:58:07,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:07,922 INFO L225 Difference]: With dead ends: 87 [2021-01-06 22:58:07,922 INFO L226 Difference]: Without dead ends: 81 [2021-01-06 22:58:07,922 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:58:07,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-01-06 22:58:07,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 55. [2021-01-06 22:58:07,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 22:58:07,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2021-01-06 22:58:07,925 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 14 [2021-01-06 22:58:07,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:07,926 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2021-01-06 22:58:07,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:58:07,926 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2021-01-06 22:58:07,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:58:07,926 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:07,927 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:08,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:08,128 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:08,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:08,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1649093682, now seen corresponding path program 17 times [2021-01-06 22:58:08,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:08,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655326027] [2021-01-06 22:58:08,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:08,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:08,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655326027] [2021-01-06 22:58:08,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494424375] [2021-01-06 22:58:08,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:08,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-01-06 22:58:08,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:08,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:58:08,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:08,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:08,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:08,301 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-01-06 22:58:08,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088394483] [2021-01-06 22:58:08,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:58:08,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:08,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:58:08,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:58:08,302 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 10 states. [2021-01-06 22:58:08,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:08,469 INFO L93 Difference]: Finished difference Result 80 states and 185 transitions. [2021-01-06 22:58:08,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:58:08,469 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-01-06 22:58:08,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:08,470 INFO L225 Difference]: With dead ends: 80 [2021-01-06 22:58:08,470 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 22:58:08,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:58:08,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 22:58:08,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2021-01-06 22:58:08,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 22:58:08,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2021-01-06 22:58:08,474 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 14 [2021-01-06 22:58:08,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:08,474 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2021-01-06 22:58:08,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:58:08,474 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2021-01-06 22:58:08,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:58:08,475 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:08,475 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:08,689 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:08,690 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:08,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:08,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1626836922, now seen corresponding path program 18 times [2021-01-06 22:58:08,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:08,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777518781] [2021-01-06 22:58:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:08,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:08,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777518781] [2021-01-06 22:58:08,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964842153] [2021-01-06 22:58:08,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:08,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-01-06 22:58:08,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:08,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:58:08,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:08,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:08,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:08,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-01-06 22:58:08,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342356863] [2021-01-06 22:58:08,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-01-06 22:58:08,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:08,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-01-06 22:58:08,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-01-06 22:58:08,852 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 10 states. [2021-01-06 22:58:09,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:09,051 INFO L93 Difference]: Finished difference Result 97 states and 227 transitions. [2021-01-06 22:58:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:58:09,052 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2021-01-06 22:58:09,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:09,054 INFO L225 Difference]: With dead ends: 97 [2021-01-06 22:58:09,054 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 22:58:09,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:58:09,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 22:58:09,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2021-01-06 22:58:09,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 22:58:09,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 149 transitions. [2021-01-06 22:58:09,058 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 149 transitions. Word has length 14 [2021-01-06 22:58:09,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:09,059 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 149 transitions. [2021-01-06 22:58:09,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2021-01-06 22:58:09,059 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 149 transitions. [2021-01-06 22:58:09,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-01-06 22:58:09,059 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:09,060 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:09,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-01-06 22:58:09,275 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:09,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:09,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1626814602, now seen corresponding path program 19 times [2021-01-06 22:58:09,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:09,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583957032] [2021-01-06 22:58:09,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:09,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:09,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:09,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583957032] [2021-01-06 22:58:09,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727539842] [2021-01-06 22:58:09,351 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:09,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:58:09,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:09,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:09,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:09,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-06 22:58:09,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581628208] [2021-01-06 22:58:09,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:09,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:09,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:09,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:09,467 INFO L87 Difference]: Start difference. First operand 59 states and 149 transitions. Second operand 12 states. [2021-01-06 22:58:09,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:09,825 INFO L93 Difference]: Finished difference Result 93 states and 217 transitions. [2021-01-06 22:58:09,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:09,825 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2021-01-06 22:58:09,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:09,826 INFO L225 Difference]: With dead ends: 93 [2021-01-06 22:58:09,826 INFO L226 Difference]: Without dead ends: 80 [2021-01-06 22:58:09,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:58:09,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-01-06 22:58:09,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2021-01-06 22:58:09,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2021-01-06 22:58:09,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 126 transitions. [2021-01-06 22:58:09,831 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 126 transitions. Word has length 14 [2021-01-06 22:58:09,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:09,831 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 126 transitions. [2021-01-06 22:58:09,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:09,831 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 126 transitions. [2021-01-06 22:58:09,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:58:09,832 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:09,832 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:10,047 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:10,048 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:10,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:10,049 INFO L82 PathProgramCache]: Analyzing trace with hash -950727129, now seen corresponding path program 20 times [2021-01-06 22:58:10,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:10,049 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451117325] [2021-01-06 22:58:10,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:10,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:10,143 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:10,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451117325] [2021-01-06 22:58:10,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569983246] [2021-01-06 22:58:10,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:10,208 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:10,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:10,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:58:10,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:10,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:10,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:10,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-01-06 22:58:10,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288374446] [2021-01-06 22:58:10,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:58:10,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:10,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:58:10,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:58:10,238 INFO L87 Difference]: Start difference. First operand 52 states and 126 transitions. Second operand 11 states. [2021-01-06 22:58:10,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:10,418 INFO L93 Difference]: Finished difference Result 77 states and 177 transitions. [2021-01-06 22:58:10,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:58:10,419 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2021-01-06 22:58:10,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:10,420 INFO L225 Difference]: With dead ends: 77 [2021-01-06 22:58:10,420 INFO L226 Difference]: Without dead ends: 71 [2021-01-06 22:58:10,420 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:58:10,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-01-06 22:58:10,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2021-01-06 22:58:10,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2021-01-06 22:58:10,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 129 transitions. [2021-01-06 22:58:10,424 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 129 transitions. Word has length 15 [2021-01-06 22:58:10,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:10,424 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 129 transitions. [2021-01-06 22:58:10,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:58:10,424 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 129 transitions. [2021-01-06 22:58:10,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:58:10,425 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:10,425 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:10,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-01-06 22:58:10,641 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:10,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:10,642 INFO L82 PathProgramCache]: Analyzing trace with hash -1036817249, now seen corresponding path program 21 times [2021-01-06 22:58:10,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:10,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512058207] [2021-01-06 22:58:10,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:10,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:10,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512058207] [2021-01-06 22:58:10,800 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948441470] [2021-01-06 22:58:10,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:10,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:58:10,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:10,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2021-01-06 22:58:10,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:10,888 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:10,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:10,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-01-06 22:58:10,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573587204] [2021-01-06 22:58:10,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-01-06 22:58:10,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:10,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-01-06 22:58:10,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-01-06 22:58:10,890 INFO L87 Difference]: Start difference. First operand 53 states and 129 transitions. Second operand 11 states. [2021-01-06 22:58:11,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:11,126 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2021-01-06 22:58:11,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:58:11,126 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2021-01-06 22:58:11,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:11,127 INFO L225 Difference]: With dead ends: 83 [2021-01-06 22:58:11,127 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 22:58:11,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:58:11,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 22:58:11,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2021-01-06 22:58:11,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 22:58:11,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2021-01-06 22:58:11,131 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 15 [2021-01-06 22:58:11,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:11,131 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2021-01-06 22:58:11,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2021-01-06 22:58:11,132 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2021-01-06 22:58:11,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-01-06 22:58:11,132 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:11,132 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:11,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-01-06 22:58:11,346 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:11,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:11,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1014534325, now seen corresponding path program 22 times [2021-01-06 22:58:11,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:11,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632988931] [2021-01-06 22:58:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:11,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:11,414 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:11,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632988931] [2021-01-06 22:58:11,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849296767] [2021-01-06 22:58:11,414 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:11,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:11,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:11,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:58:11,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:11,498 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:58:11,515 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:11,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:11,516 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-01-06 22:58:11,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053067230] [2021-01-06 22:58:11,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:11,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:11,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:11,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:11,518 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 12 states. [2021-01-06 22:58:11,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:11,814 INFO L93 Difference]: Finished difference Result 94 states and 224 transitions. [2021-01-06 22:58:11,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:58:11,814 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2021-01-06 22:58:11,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:11,815 INFO L225 Difference]: With dead ends: 94 [2021-01-06 22:58:11,815 INFO L226 Difference]: Without dead ends: 83 [2021-01-06 22:58:11,816 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:58:11,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-01-06 22:58:11,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 59. [2021-01-06 22:58:11,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 22:58:11,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2021-01-06 22:58:11,818 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 15 [2021-01-06 22:58:11,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:11,819 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2021-01-06 22:58:11,819 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:11,819 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2021-01-06 22:58:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:11,819 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:11,819 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:12,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-01-06 22:58:12,033 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:12,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:12,034 INFO L82 PathProgramCache]: Analyzing trace with hash -946576148, now seen corresponding path program 23 times [2021-01-06 22:58:12,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:12,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44767875] [2021-01-06 22:58:12,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:12,202 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:12,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44767875] [2021-01-06 22:58:12,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266659272] [2021-01-06 22:58:12,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:12,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 22:58:12,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:12,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:12,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:12,316 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:12,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:12,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 22:58:12,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967320694] [2021-01-06 22:58:12,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:58:12,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:12,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:58:12,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:12,322 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 13 states. [2021-01-06 22:58:12,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:12,493 INFO L93 Difference]: Finished difference Result 76 states and 179 transitions. [2021-01-06 22:58:12,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-01-06 22:58:12,493 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2021-01-06 22:58:12,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:12,494 INFO L225 Difference]: With dead ends: 76 [2021-01-06 22:58:12,494 INFO L226 Difference]: Without dead ends: 70 [2021-01-06 22:58:12,495 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:58:12,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-01-06 22:58:12,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2021-01-06 22:58:12,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:12,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2021-01-06 22:58:12,498 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2021-01-06 22:58:12,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:12,498 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2021-01-06 22:58:12,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:58:12,498 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2021-01-06 22:58:12,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:12,499 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:12,499 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:12,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-01-06 22:58:12,702 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:12,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:12,703 INFO L82 PathProgramCache]: Analyzing trace with hash 1192145786, now seen corresponding path program 24 times [2021-01-06 22:58:12,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:12,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091575957] [2021-01-06 22:58:12,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:12,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:12,806 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:12,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091575957] [2021-01-06 22:58:12,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723816331] [2021-01-06 22:58:12,807 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:12,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-01-06 22:58:12,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:12,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:58:12,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:12,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:12,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:12,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-01-06 22:58:12,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721830283] [2021-01-06 22:58:12,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:12,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:12,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:12,911 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:12,911 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2021-01-06 22:58:13,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:13,072 INFO L93 Difference]: Finished difference Result 101 states and 229 transitions. [2021-01-06 22:58:13,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-01-06 22:58:13,072 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 22:58:13,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:13,073 INFO L225 Difference]: With dead ends: 101 [2021-01-06 22:58:13,073 INFO L226 Difference]: Without dead ends: 95 [2021-01-06 22:58:13,074 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:58:13,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-01-06 22:58:13,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2021-01-06 22:58:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:13,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2021-01-06 22:58:13,077 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2021-01-06 22:58:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:13,078 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2021-01-06 22:58:13,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:13,078 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2021-01-06 22:58:13,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:13,078 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:13,078 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:13,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-01-06 22:58:13,294 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:13,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:13,294 INFO L82 PathProgramCache]: Analyzing trace with hash 63919090, now seen corresponding path program 25 times [2021-01-06 22:58:13,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:13,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275942449] [2021-01-06 22:58:13,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:13,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:13,390 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:13,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275942449] [2021-01-06 22:58:13,390 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874714280] [2021-01-06 22:58:13,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:13,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:13,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:58:13,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:13,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:13,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-01-06 22:58:13,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112341317] [2021-01-06 22:58:13,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:13,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:13,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:13,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:13,466 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2021-01-06 22:58:13,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:13,692 INFO L93 Difference]: Finished difference Result 94 states and 215 transitions. [2021-01-06 22:58:13,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:58:13,693 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 22:58:13,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:13,694 INFO L225 Difference]: With dead ends: 94 [2021-01-06 22:58:13,694 INFO L226 Difference]: Without dead ends: 88 [2021-01-06 22:58:13,695 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:58:13,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-01-06 22:58:13,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2021-01-06 22:58:13,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:13,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2021-01-06 22:58:13,698 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2021-01-06 22:58:13,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:13,698 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2021-01-06 22:58:13,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:13,698 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2021-01-06 22:58:13,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:13,699 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:13,699 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:13,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:13,914 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:13,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:13,915 INFO L82 PathProgramCache]: Analyzing trace with hash -22171030, now seen corresponding path program 26 times [2021-01-06 22:58:13,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:13,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986609100] [2021-01-06 22:58:13,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:13,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:14,002 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:14,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986609100] [2021-01-06 22:58:14,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1354628637] [2021-01-06 22:58:14,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:14,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:14,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:14,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:58:14,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:14,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:14,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-01-06 22:58:14,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034144152] [2021-01-06 22:58:14,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:14,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:14,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:14,091 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2021-01-06 22:58:14,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:14,346 INFO L93 Difference]: Finished difference Result 88 states and 203 transitions. [2021-01-06 22:58:14,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:58:14,347 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 22:58:14,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:14,348 INFO L225 Difference]: With dead ends: 88 [2021-01-06 22:58:14,348 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 22:58:14,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:58:14,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 22:58:14,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2021-01-06 22:58:14,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2021-01-06 22:58:14,352 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2021-01-06 22:58:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:14,352 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2021-01-06 22:58:14,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2021-01-06 22:58:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:14,353 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:14,353 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:14,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-01-06 22:58:14,567 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:14,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:14,568 INFO L82 PathProgramCache]: Analyzing trace with hash 111894, now seen corresponding path program 27 times [2021-01-06 22:58:14,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:14,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379877076] [2021-01-06 22:58:14,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:14,651 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:14,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379877076] [2021-01-06 22:58:14,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653316215] [2021-01-06 22:58:14,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:14,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-01-06 22:58:14,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:14,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:58:14,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:14,761 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:14,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:14,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-01-06 22:58:14,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27303625] [2021-01-06 22:58:14,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:14,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:14,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:14,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:14,764 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2021-01-06 22:58:15,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:15,066 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2021-01-06 22:58:15,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:58:15,079 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 22:58:15,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:15,080 INFO L225 Difference]: With dead ends: 85 [2021-01-06 22:58:15,080 INFO L226 Difference]: Without dead ends: 79 [2021-01-06 22:58:15,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=221, Invalid=481, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:58:15,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-01-06 22:58:15,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2021-01-06 22:58:15,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:15,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2021-01-06 22:58:15,084 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 16 [2021-01-06 22:58:15,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:15,084 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2021-01-06 22:58:15,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:15,084 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2021-01-06 22:58:15,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:15,085 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:15,085 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:15,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:15,297 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:15,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:15,298 INFO L82 PathProgramCache]: Analyzing trace with hash 85730, now seen corresponding path program 28 times [2021-01-06 22:58:15,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:15,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294812969] [2021-01-06 22:58:15,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:15,369 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:15,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294812969] [2021-01-06 22:58:15,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598169932] [2021-01-06 22:58:15,370 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:15,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:15,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:15,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:58:15,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:15,451 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:15,452 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:15,452 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-01-06 22:58:15,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476161629] [2021-01-06 22:58:15,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-01-06 22:58:15,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:15,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-01-06 22:58:15,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-01-06 22:58:15,453 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 12 states. [2021-01-06 22:58:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:15,703 INFO L93 Difference]: Finished difference Result 110 states and 257 transitions. [2021-01-06 22:58:15,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:15,704 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2021-01-06 22:58:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:15,705 INFO L225 Difference]: With dead ends: 110 [2021-01-06 22:58:15,705 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 22:58:15,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2021-01-06 22:58:15,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 22:58:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2021-01-06 22:58:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2021-01-06 22:58:15,708 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 16 [2021-01-06 22:58:15,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:15,708 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2021-01-06 22:58:15,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2021-01-06 22:58:15,709 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2021-01-06 22:58:15,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-01-06 22:58:15,709 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:15,709 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:15,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-01-06 22:58:15,925 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:15,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:15,925 INFO L82 PathProgramCache]: Analyzing trace with hash 108050, now seen corresponding path program 29 times [2021-01-06 22:58:15,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:15,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305927675] [2021-01-06 22:58:15,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:16,004 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:16,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305927675] [2021-01-06 22:58:16,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737836733] [2021-01-06 22:58:16,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:16,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-01-06 22:58:16,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:16,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2021-01-06 22:58:16,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:16,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:16,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:16,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-01-06 22:58:16,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692553977] [2021-01-06 22:58:16,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:58:16,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:16,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:58:16,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:16,092 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 13 states. [2021-01-06 22:58:16,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:16,478 INFO L93 Difference]: Finished difference Result 88 states and 209 transitions. [2021-01-06 22:58:16,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:16,479 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2021-01-06 22:58:16,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:16,479 INFO L225 Difference]: With dead ends: 88 [2021-01-06 22:58:16,480 INFO L226 Difference]: Without dead ends: 74 [2021-01-06 22:58:16,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:58:16,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-01-06 22:58:16,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2021-01-06 22:58:16,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 22:58:16,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2021-01-06 22:58:16,491 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 16 [2021-01-06 22:58:16,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:16,491 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2021-01-06 22:58:16,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:58:16,492 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2021-01-06 22:58:16,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:16,492 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:16,492 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:16,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:16,706 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:16,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:16,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1179278347, now seen corresponding path program 30 times [2021-01-06 22:58:16,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:16,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350310796] [2021-01-06 22:58:16,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:16,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:16,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350310796] [2021-01-06 22:58:16,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865132538] [2021-01-06 22:58:16,814 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:16,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 22:58:16,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:16,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:16,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:16,912 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:16,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:16,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-06 22:58:16,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296384703] [2021-01-06 22:58:16,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:58:16,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:16,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:58:16,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:16,915 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 13 states. [2021-01-06 22:58:17,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:17,155 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2021-01-06 22:58:17,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:58:17,156 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2021-01-06 22:58:17,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:17,157 INFO L225 Difference]: With dead ends: 83 [2021-01-06 22:58:17,157 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 22:58:17,157 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:58:17,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 22:58:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2021-01-06 22:58:17,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2021-01-06 22:58:17,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2021-01-06 22:58:17,160 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2021-01-06 22:58:17,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:17,161 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2021-01-06 22:58:17,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:58:17,161 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2021-01-06 22:58:17,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:17,161 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:17,162 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:17,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-01-06 22:58:17,373 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:17,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:17,374 INFO L82 PathProgramCache]: Analyzing trace with hash 51051651, now seen corresponding path program 31 times [2021-01-06 22:58:17,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:17,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298193442] [2021-01-06 22:58:17,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:17,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:17,476 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:17,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298193442] [2021-01-06 22:58:17,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332309634] [2021-01-06 22:58:17,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:17,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:17,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:17,564 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:17,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:17,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-06 22:58:17,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365557298] [2021-01-06 22:58:17,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:58:17,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:17,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:58:17,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:17,566 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 13 states. [2021-01-06 22:58:17,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:17,835 INFO L93 Difference]: Finished difference Result 90 states and 207 transitions. [2021-01-06 22:58:17,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:17,835 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2021-01-06 22:58:17,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:17,836 INFO L225 Difference]: With dead ends: 90 [2021-01-06 22:58:17,836 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 22:58:17,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:58:17,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 22:58:17,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2021-01-06 22:58:17,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2021-01-06 22:58:17,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2021-01-06 22:58:17,839 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2021-01-06 22:58:17,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:17,840 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2021-01-06 22:58:17,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:58:17,840 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2021-01-06 22:58:17,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:17,840 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:17,840 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:18,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:18,054 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:18,055 INFO L82 PathProgramCache]: Analyzing trace with hash -35038469, now seen corresponding path program 32 times [2021-01-06 22:58:18,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:18,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837246158] [2021-01-06 22:58:18,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:18,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:18,141 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837246158] [2021-01-06 22:58:18,142 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911991553] [2021-01-06 22:58:18,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:18,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:18,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:18,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:18,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:18,221 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:18,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:18,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-06 22:58:18,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280460794] [2021-01-06 22:58:18,222 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:58:18,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:18,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:58:18,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:18,223 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2021-01-06 22:58:18,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:18,519 INFO L93 Difference]: Finished difference Result 88 states and 205 transitions. [2021-01-06 22:58:18,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:18,522 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2021-01-06 22:58:18,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:18,524 INFO L225 Difference]: With dead ends: 88 [2021-01-06 22:58:18,524 INFO L226 Difference]: Without dead ends: 82 [2021-01-06 22:58:18,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:58:18,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-01-06 22:58:18,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2021-01-06 22:58:18,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2021-01-06 22:58:18,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2021-01-06 22:58:18,528 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2021-01-06 22:58:18,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:18,528 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2021-01-06 22:58:18,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:58:18,528 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2021-01-06 22:58:18,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:18,529 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:18,529 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:18,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-01-06 22:58:18,745 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:18,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:18,746 INFO L82 PathProgramCache]: Analyzing trace with hash -12781709, now seen corresponding path program 33 times [2021-01-06 22:58:18,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:18,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103249492] [2021-01-06 22:58:18,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:18,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:18,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103249492] [2021-01-06 22:58:18,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384282671] [2021-01-06 22:58:18,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:18,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 22:58:18,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:18,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:18,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:18,931 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:18,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:18,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-01-06 22:58:18,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029636144] [2021-01-06 22:58:18,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:58:18,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:18,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:58:18,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-01-06 22:58:18,934 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 13 states. [2021-01-06 22:58:19,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:19,274 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2021-01-06 22:58:19,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:19,280 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2021-01-06 22:58:19,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:19,281 INFO L225 Difference]: With dead ends: 105 [2021-01-06 22:58:19,281 INFO L226 Difference]: Without dead ends: 99 [2021-01-06 22:58:19,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:58:19,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-01-06 22:58:19,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 64. [2021-01-06 22:58:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 22:58:19,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2021-01-06 22:58:19,285 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2021-01-06 22:58:19,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:19,286 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2021-01-06 22:58:19,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:58:19,286 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2021-01-06 22:58:19,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-01-06 22:58:19,286 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:19,287 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:19,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:19,500 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:19,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:19,501 INFO L82 PathProgramCache]: Analyzing trace with hash -12759389, now seen corresponding path program 34 times [2021-01-06 22:58:19,501 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:19,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975289905] [2021-01-06 22:58:19,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:19,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:19,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975289905] [2021-01-06 22:58:19,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139802530] [2021-01-06 22:58:19,585 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:19,650 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:19,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:19,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2021-01-06 22:58:19,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:19,692 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:19,692 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:19,692 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-01-06 22:58:19,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929299677] [2021-01-06 22:58:19,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-01-06 22:58:19,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:19,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-01-06 22:58:19,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:58:19,697 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2021-01-06 22:58:20,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:20,146 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2021-01-06 22:58:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:20,147 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2021-01-06 22:58:20,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:20,148 INFO L225 Difference]: With dead ends: 88 [2021-01-06 22:58:20,148 INFO L226 Difference]: Without dead ends: 77 [2021-01-06 22:58:20,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=350, Invalid=772, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:58:20,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-01-06 22:58:20,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2021-01-06 22:58:20,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2021-01-06 22:58:20,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2021-01-06 22:58:20,152 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2021-01-06 22:58:20,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:20,153 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2021-01-06 22:58:20,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2021-01-06 22:58:20,153 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2021-01-06 22:58:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 22:58:20,153 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:20,153 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:20,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-01-06 22:58:20,364 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:20,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:20,365 INFO L82 PathProgramCache]: Analyzing trace with hash 873403792, now seen corresponding path program 35 times [2021-01-06 22:58:20,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:20,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333054401] [2021-01-06 22:58:20,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:20,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:20,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:20,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333054401] [2021-01-06 22:58:20,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304082576] [2021-01-06 22:58:20,506 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:20,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 22:58:20,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:20,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:58:20,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:20,625 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:20,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:20,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-06 22:58:20,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173385371] [2021-01-06 22:58:20,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:20,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:20,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:20,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:20,629 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 16 states. [2021-01-06 22:58:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:20,857 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2021-01-06 22:58:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-01-06 22:58:20,858 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2021-01-06 22:58:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:20,859 INFO L225 Difference]: With dead ends: 69 [2021-01-06 22:58:20,859 INFO L226 Difference]: Without dead ends: 63 [2021-01-06 22:58:20,859 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:58:20,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-01-06 22:58:20,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2021-01-06 22:58:20,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2021-01-06 22:58:20,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 129 transitions. [2021-01-06 22:58:20,862 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 129 transitions. Word has length 18 [2021-01-06 22:58:20,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:20,862 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 129 transitions. [2021-01-06 22:58:20,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:20,862 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 129 transitions. [2021-01-06 22:58:20,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 22:58:20,863 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:20,863 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:21,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-01-06 22:58:21,077 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:21,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:21,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1104152418, now seen corresponding path program 36 times [2021-01-06 22:58:21,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:21,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533021380] [2021-01-06 22:58:21,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:21,210 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:21,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533021380] [2021-01-06 22:58:21,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074775328] [2021-01-06 22:58:21,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:21,265 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-01-06 22:58:21,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:21,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:21,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:21,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:21,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:21,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 22:58:21,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358475338] [2021-01-06 22:58:21,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:21,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:21,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:21,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:21,307 INFO L87 Difference]: Start difference. First operand 54 states and 129 transitions. Second operand 15 states. [2021-01-06 22:58:21,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:21,525 INFO L93 Difference]: Finished difference Result 102 states and 229 transitions. [2021-01-06 22:58:21,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-01-06 22:58:21,525 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2021-01-06 22:58:21,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:21,526 INFO L225 Difference]: With dead ends: 102 [2021-01-06 22:58:21,527 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 22:58:21,527 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:58:21,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 22:58:21,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 58. [2021-01-06 22:58:21,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2021-01-06 22:58:21,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2021-01-06 22:58:21,532 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 18 [2021-01-06 22:58:21,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:21,532 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2021-01-06 22:58:21,532 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:21,532 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2021-01-06 22:58:21,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 22:58:21,533 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:21,533 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:21,747 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-01-06 22:58:21,748 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:21,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:21,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1296718614, now seen corresponding path program 37 times [2021-01-06 22:58:21,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:21,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234504022] [2021-01-06 22:58:21,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:21,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:21,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234504022] [2021-01-06 22:58:21,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425013401] [2021-01-06 22:58:21,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:21,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:58:21,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:21,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:21,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:21,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 22:58:21,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477919809] [2021-01-06 22:58:21,949 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:21,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:21,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:21,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:21,950 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 15 states. [2021-01-06 22:58:22,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:22,189 INFO L93 Difference]: Finished difference Result 97 states and 221 transitions. [2021-01-06 22:58:22,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:58:22,190 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2021-01-06 22:58:22,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:22,191 INFO L225 Difference]: With dead ends: 97 [2021-01-06 22:58:22,191 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 22:58:22,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2021-01-06 22:58:22,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 22:58:22,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2021-01-06 22:58:22,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2021-01-06 22:58:22,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2021-01-06 22:58:22,195 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 18 [2021-01-06 22:58:22,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:22,195 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2021-01-06 22:58:22,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:22,195 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2021-01-06 22:58:22,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 22:58:22,196 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:22,196 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:22,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-01-06 22:58:22,404 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:22,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:22,405 INFO L82 PathProgramCache]: Analyzing trace with hash 168491918, now seen corresponding path program 38 times [2021-01-06 22:58:22,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:22,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357819567] [2021-01-06 22:58:22,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:22,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:22,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357819567] [2021-01-06 22:58:22,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [185578667] [2021-01-06 22:58:22,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:22,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:22,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:22,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:58:22,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:22,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:22,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 22:58:22,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647364094] [2021-01-06 22:58:22,611 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:22,611 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:22,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:22,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:22,612 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 15 states. [2021-01-06 22:58:22,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:22,927 INFO L93 Difference]: Finished difference Result 95 states and 219 transitions. [2021-01-06 22:58:22,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:22,928 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2021-01-06 22:58:22,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:22,929 INFO L225 Difference]: With dead ends: 95 [2021-01-06 22:58:22,929 INFO L226 Difference]: Without dead ends: 89 [2021-01-06 22:58:22,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2021-01-06 22:58:22,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-01-06 22:58:22,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2021-01-06 22:58:22,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 22:58:22,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2021-01-06 22:58:22,933 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 18 [2021-01-06 22:58:22,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:22,933 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2021-01-06 22:58:22,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:22,933 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2021-01-06 22:58:22,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 22:58:22,934 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:22,934 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:23,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:23,148 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:23,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:23,148 INFO L82 PathProgramCache]: Analyzing trace with hash 82401798, now seen corresponding path program 39 times [2021-01-06 22:58:23,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:23,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071242531] [2021-01-06 22:58:23,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:23,247 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:23,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071242531] [2021-01-06 22:58:23,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430763365] [2021-01-06 22:58:23,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:23,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-01-06 22:58:23,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:23,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:58:23,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:23,354 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:23,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:23,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 22:58:23,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653139657] [2021-01-06 22:58:23,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:23,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:23,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:23,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:23,356 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 15 states. [2021-01-06 22:58:23,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:23,680 INFO L93 Difference]: Finished difference Result 93 states and 217 transitions. [2021-01-06 22:58:23,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:23,681 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2021-01-06 22:58:23,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:23,682 INFO L225 Difference]: With dead ends: 93 [2021-01-06 22:58:23,682 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 22:58:23,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:58:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 22:58:23,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 64. [2021-01-06 22:58:23,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2021-01-06 22:58:23,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2021-01-06 22:58:23,686 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2021-01-06 22:58:23,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:23,687 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2021-01-06 22:58:23,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:23,687 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2021-01-06 22:58:23,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 22:58:23,687 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:23,687 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:23,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-01-06 22:58:23,901 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:23,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:23,902 INFO L82 PathProgramCache]: Analyzing trace with hash 104658558, now seen corresponding path program 40 times [2021-01-06 22:58:23,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:23,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118546801] [2021-01-06 22:58:23,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:24,006 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:24,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118546801] [2021-01-06 22:58:24,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990004945] [2021-01-06 22:58:24,007 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:24,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:24,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:24,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:58:24,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:24,102 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:24,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:24,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-01-06 22:58:24,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284605597] [2021-01-06 22:58:24,103 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:24,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:24,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:24,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:24,104 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2021-01-06 22:58:24,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:24,508 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2021-01-06 22:58:24,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:24,509 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2021-01-06 22:58:24,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:24,510 INFO L225 Difference]: With dead ends: 111 [2021-01-06 22:58:24,510 INFO L226 Difference]: Without dead ends: 105 [2021-01-06 22:58:24,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=770, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:58:24,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-01-06 22:58:24,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 69. [2021-01-06 22:58:24,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 22:58:24,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 177 transitions. [2021-01-06 22:58:24,515 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 177 transitions. Word has length 18 [2021-01-06 22:58:24,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:24,515 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 177 transitions. [2021-01-06 22:58:24,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:24,515 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 177 transitions. [2021-01-06 22:58:24,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-01-06 22:58:24,516 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:24,516 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:24,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-01-06 22:58:24,731 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:24,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:24,731 INFO L82 PathProgramCache]: Analyzing trace with hash 104680878, now seen corresponding path program 41 times [2021-01-06 22:58:24,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:24,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795468624] [2021-01-06 22:58:24,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:24,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:24,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:24,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795468624] [2021-01-06 22:58:24,829 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283720806] [2021-01-06 22:58:24,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:24,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-01-06 22:58:24,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:24,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2021-01-06 22:58:24,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:24,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:24,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:24,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2021-01-06 22:58:24,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481622521] [2021-01-06 22:58:24,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:24,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:24,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:24,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:24,947 INFO L87 Difference]: Start difference. First operand 69 states and 177 transitions. Second operand 16 states. [2021-01-06 22:58:25,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:25,541 INFO L93 Difference]: Finished difference Result 109 states and 259 transitions. [2021-01-06 22:58:25,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:58:25,541 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2021-01-06 22:58:25,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:25,542 INFO L225 Difference]: With dead ends: 109 [2021-01-06 22:58:25,542 INFO L226 Difference]: Without dead ends: 96 [2021-01-06 22:58:25,543 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=447, Invalid=1035, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 22:58:25,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-01-06 22:58:25,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2021-01-06 22:58:25,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 22:58:25,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2021-01-06 22:58:25,547 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 18 [2021-01-06 22:58:25,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:25,547 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2021-01-06 22:58:25,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:25,547 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2021-01-06 22:58:25,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:58:25,548 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:25,548 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:25,756 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:25,757 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:25,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:25,757 INFO L82 PathProgramCache]: Analyzing trace with hash -584859409, now seen corresponding path program 42 times [2021-01-06 22:58:25,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:25,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400757055] [2021-01-06 22:58:25,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:25,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:25,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400757055] [2021-01-06 22:58:25,883 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595996145] [2021-01-06 22:58:25,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:25,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 22:58:25,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:25,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:58:25,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:25,982 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:25,983 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:25,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-06 22:58:25,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647470248] [2021-01-06 22:58:25,984 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:25,984 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:25,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:25,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:25,984 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2021-01-06 22:58:26,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:26,295 INFO L93 Difference]: Finished difference Result 100 states and 235 transitions. [2021-01-06 22:58:26,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:26,296 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2021-01-06 22:58:26,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:26,297 INFO L225 Difference]: With dead ends: 100 [2021-01-06 22:58:26,297 INFO L226 Difference]: Without dead ends: 94 [2021-01-06 22:58:26,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:58:26,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-01-06 22:58:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2021-01-06 22:58:26,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 22:58:26,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2021-01-06 22:58:26,302 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2021-01-06 22:58:26,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:26,303 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2021-01-06 22:58:26,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:26,303 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2021-01-06 22:58:26,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:58:26,303 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:26,303 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:26,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-01-06 22:58:26,504 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:26,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:26,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1816011623, now seen corresponding path program 43 times [2021-01-06 22:58:26,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:26,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1649154221] [2021-01-06 22:58:26,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:26,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:26,622 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:26,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1649154221] [2021-01-06 22:58:26,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946350460] [2021-01-06 22:58:26,623 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:26,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:58:26,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:26,715 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:26,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:26,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-06 22:58:26,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604090585] [2021-01-06 22:58:26,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:26,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:26,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:26,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:26,717 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2021-01-06 22:58:27,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:27,060 INFO L93 Difference]: Finished difference Result 107 states and 249 transitions. [2021-01-06 22:58:27,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:27,060 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2021-01-06 22:58:27,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:27,061 INFO L225 Difference]: With dead ends: 107 [2021-01-06 22:58:27,062 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 22:58:27,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2021-01-06 22:58:27,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 22:58:27,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2021-01-06 22:58:27,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 22:58:27,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2021-01-06 22:58:27,066 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2021-01-06 22:58:27,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:27,066 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2021-01-06 22:58:27,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:27,066 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2021-01-06 22:58:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:58:27,067 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:27,067 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:27,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:27,276 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:27,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:27,276 INFO L82 PathProgramCache]: Analyzing trace with hash 687784927, now seen corresponding path program 44 times [2021-01-06 22:58:27,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:27,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161364297] [2021-01-06 22:58:27,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:27,394 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:27,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161364297] [2021-01-06 22:58:27,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542543913] [2021-01-06 22:58:27,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:27,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:27,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:27,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:58:27,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:27,483 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:27,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:27,483 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-06 22:58:27,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362168869] [2021-01-06 22:58:27,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:27,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:27,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:27,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:27,485 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2021-01-06 22:58:27,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:27,840 INFO L93 Difference]: Finished difference Result 103 states and 241 transitions. [2021-01-06 22:58:27,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:27,841 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2021-01-06 22:58:27,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:27,842 INFO L225 Difference]: With dead ends: 103 [2021-01-06 22:58:27,842 INFO L226 Difference]: Without dead ends: 97 [2021-01-06 22:58:27,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2021-01-06 22:58:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-01-06 22:58:27,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2021-01-06 22:58:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 22:58:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2021-01-06 22:58:27,846 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2021-01-06 22:58:27,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:27,846 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2021-01-06 22:58:27,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:27,846 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2021-01-06 22:58:27,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:58:27,846 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:27,847 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:28,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-01-06 22:58:28,056 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:28,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash 601694807, now seen corresponding path program 45 times [2021-01-06 22:58:28,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:28,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738860957] [2021-01-06 22:58:28,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:28,161 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:28,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738860957] [2021-01-06 22:58:28,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200058326] [2021-01-06 22:58:28,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:28,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 22:58:28,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:28,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:58:28,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:28,268 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:28,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:28,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-06 22:58:28,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180869781] [2021-01-06 22:58:28,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:28,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:28,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:28,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:28,270 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2021-01-06 22:58:28,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:28,696 INFO L93 Difference]: Finished difference Result 99 states and 233 transitions. [2021-01-06 22:58:28,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:58:28,697 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2021-01-06 22:58:28,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:28,698 INFO L225 Difference]: With dead ends: 99 [2021-01-06 22:58:28,698 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 22:58:28,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:58:28,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 22:58:28,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2021-01-06 22:58:28,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2021-01-06 22:58:28,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2021-01-06 22:58:28,702 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2021-01-06 22:58:28,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:28,702 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2021-01-06 22:58:28,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:28,702 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2021-01-06 22:58:28,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:58:28,703 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:28,703 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:28,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:28,916 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:28,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:28,917 INFO L82 PathProgramCache]: Analyzing trace with hash 623951567, now seen corresponding path program 46 times [2021-01-06 22:58:28,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:28,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775187477] [2021-01-06 22:58:28,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:28,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:29,031 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:29,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775187477] [2021-01-06 22:58:29,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762407537] [2021-01-06 22:58:29,031 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:29,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:29,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:29,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:58:29,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:29,123 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:29,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:29,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-01-06 22:58:29,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768919740] [2021-01-06 22:58:29,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-01-06 22:58:29,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:29,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-01-06 22:58:29,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-01-06 22:58:29,125 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2021-01-06 22:58:29,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:29,552 INFO L93 Difference]: Finished difference Result 115 states and 273 transitions. [2021-01-06 22:58:29,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:58:29,553 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2021-01-06 22:58:29,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:29,554 INFO L225 Difference]: With dead ends: 115 [2021-01-06 22:58:29,554 INFO L226 Difference]: Without dead ends: 109 [2021-01-06 22:58:29,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:58:29,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-01-06 22:58:29,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 72. [2021-01-06 22:58:29,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 22:58:29,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2021-01-06 22:58:29,565 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 19 [2021-01-06 22:58:29,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:29,565 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2021-01-06 22:58:29,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2021-01-06 22:58:29,565 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2021-01-06 22:58:29,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-01-06 22:58:29,566 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:29,566 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:29,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-01-06 22:58:29,771 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:29,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:29,772 INFO L82 PathProgramCache]: Analyzing trace with hash 623973887, now seen corresponding path program 47 times [2021-01-06 22:58:29,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:29,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970589193] [2021-01-06 22:58:29,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:29,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:29,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970589193] [2021-01-06 22:58:29,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147391260] [2021-01-06 22:58:29,874 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:29,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 22:58:29,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:29,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2021-01-06 22:58:29,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:29,979 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:29,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:29,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 22:58:29,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043640815] [2021-01-06 22:58:29,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:29,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:29,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:29,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:29,981 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 16 states. [2021-01-06 22:58:30,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:30,578 INFO L93 Difference]: Finished difference Result 98 states and 237 transitions. [2021-01-06 22:58:30,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:58:30,578 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2021-01-06 22:58:30,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:30,580 INFO L225 Difference]: With dead ends: 98 [2021-01-06 22:58:30,580 INFO L226 Difference]: Without dead ends: 87 [2021-01-06 22:58:30,581 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=484, Invalid=1076, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:58:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-01-06 22:58:30,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2021-01-06 22:58:30,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 22:58:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 175 transitions. [2021-01-06 22:58:30,583 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 175 transitions. Word has length 19 [2021-01-06 22:58:30,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:30,584 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 175 transitions. [2021-01-06 22:58:30,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:30,584 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 175 transitions. [2021-01-06 22:58:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:30,584 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:30,584 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:30,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-01-06 22:58:30,791 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:30,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:30,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1822436660, now seen corresponding path program 48 times [2021-01-06 22:58:30,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:30,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053066394] [2021-01-06 22:58:30,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:30,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053066394] [2021-01-06 22:58:30,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382915717] [2021-01-06 22:58:30,949 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:31,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 22:58:31,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:31,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:58:31,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:31,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:31,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:31,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 22:58:31,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764451717] [2021-01-06 22:58:31,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:58:31,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:31,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:58:31,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:58:31,074 INFO L87 Difference]: Start difference. First operand 69 states and 175 transitions. Second operand 17 states. [2021-01-06 22:58:31,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:31,368 INFO L93 Difference]: Finished difference Result 90 states and 217 transitions. [2021-01-06 22:58:31,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-01-06 22:58:31,369 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2021-01-06 22:58:31,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:31,370 INFO L225 Difference]: With dead ends: 90 [2021-01-06 22:58:31,370 INFO L226 Difference]: Without dead ends: 84 [2021-01-06 22:58:31,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:58:31,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-01-06 22:58:31,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2021-01-06 22:58:31,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 22:58:31,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-01-06 22:58:31,374 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2021-01-06 22:58:31,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:31,374 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-01-06 22:58:31,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:58:31,374 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-01-06 22:58:31,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:31,375 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:31,375 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:31,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:31,579 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:31,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:31,579 INFO L82 PathProgramCache]: Analyzing trace with hash -233536318, now seen corresponding path program 49 times [2021-01-06 22:58:31,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:31,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950536562] [2021-01-06 22:58:31,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:31,723 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:31,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950536562] [2021-01-06 22:58:31,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357077648] [2021-01-06 22:58:31,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:31,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:31,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 22:58:31,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:31,813 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:31,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:31,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-06 22:58:31,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151496845] [2021-01-06 22:58:31,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:31,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:31,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:31,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:31,815 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2021-01-06 22:58:32,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:32,083 INFO L93 Difference]: Finished difference Result 123 states and 283 transitions. [2021-01-06 22:58:32,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-01-06 22:58:32,084 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2021-01-06 22:58:32,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:32,085 INFO L225 Difference]: With dead ends: 123 [2021-01-06 22:58:32,085 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 22:58:32,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2021-01-06 22:58:32,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 22:58:32,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2021-01-06 22:58:32,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 22:58:32,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-01-06 22:58:32,089 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2021-01-06 22:58:32,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:32,089 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-01-06 22:58:32,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:32,089 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-01-06 22:58:32,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:32,089 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:32,090 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:32,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-01-06 22:58:32,303 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:32,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:32,304 INFO L82 PathProgramCache]: Analyzing trace with hash 606087482, now seen corresponding path program 50 times [2021-01-06 22:58:32,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:32,304 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979449498] [2021-01-06 22:58:32,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:32,441 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:32,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979449498] [2021-01-06 22:58:32,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585479165] [2021-01-06 22:58:32,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:32,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:32,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:32,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 22:58:32,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:32,549 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:32,550 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:32,550 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-06 22:58:32,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468463205] [2021-01-06 22:58:32,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:32,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:32,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:32,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:32,551 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2021-01-06 22:58:32,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:32,855 INFO L93 Difference]: Finished difference Result 116 states and 269 transitions. [2021-01-06 22:58:32,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:32,855 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2021-01-06 22:58:32,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:32,856 INFO L225 Difference]: With dead ends: 116 [2021-01-06 22:58:32,857 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 22:58:32,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2021-01-06 22:58:32,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 22:58:32,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2021-01-06 22:58:32,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 22:58:32,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-01-06 22:58:32,860 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2021-01-06 22:58:32,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:32,860 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-01-06 22:58:32,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:32,861 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-01-06 22:58:32,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:32,861 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:32,861 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:33,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:33,076 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:33,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:33,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1288008782, now seen corresponding path program 51 times [2021-01-06 22:58:33,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:33,077 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146265096] [2021-01-06 22:58:33,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:33,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:33,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146265096] [2021-01-06 22:58:33,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834655256] [2021-01-06 22:58:33,199 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:33,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-01-06 22:58:33,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:33,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:33,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:33,310 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:33,311 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:33,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-06 22:58:33,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498573706] [2021-01-06 22:58:33,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:33,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:33,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:33,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:33,312 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2021-01-06 22:58:33,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:33,687 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2021-01-06 22:58:33,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:33,688 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2021-01-06 22:58:33,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:33,689 INFO L225 Difference]: With dead ends: 112 [2021-01-06 22:58:33,689 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 22:58:33,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:58:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 22:58:33,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 73. [2021-01-06 22:58:33,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 22:58:33,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-01-06 22:58:33,693 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2021-01-06 22:58:33,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:33,693 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-01-06 22:58:33,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:33,694 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-01-06 22:58:33,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:33,694 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:33,694 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:33,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:33,910 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:33,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:33,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1878731818, now seen corresponding path program 52 times [2021-01-06 22:58:33,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:33,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44481628] [2021-01-06 22:58:33,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:33,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:34,037 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:34,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44481628] [2021-01-06 22:58:34,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849283060] [2021-01-06 22:58:34,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:34,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:34,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:34,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 22:58:34,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:34,128 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:34,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:34,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-06 22:58:34,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358729881] [2021-01-06 22:58:34,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:34,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:34,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:34,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:34,130 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2021-01-06 22:58:34,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:34,530 INFO L93 Difference]: Finished difference Result 108 states and 253 transitions. [2021-01-06 22:58:34,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:34,531 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2021-01-06 22:58:34,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:34,532 INFO L225 Difference]: With dead ends: 108 [2021-01-06 22:58:34,532 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 22:58:34,532 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 22:58:34,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 22:58:34,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2021-01-06 22:58:34,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 22:58:34,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-01-06 22:58:34,535 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2021-01-06 22:58:34,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:34,536 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-01-06 22:58:34,536 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:34,536 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-01-06 22:58:34,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:34,536 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:34,536 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:34,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-01-06 22:58:34,737 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:34,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:34,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1792641698, now seen corresponding path program 53 times [2021-01-06 22:58:34,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:34,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106383682] [2021-01-06 22:58:34,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:34,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:34,865 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:34,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106383682] [2021-01-06 22:58:34,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952220861] [2021-01-06 22:58:34,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:34,922 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-01-06 22:58:34,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:34,923 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 22:58:34,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:34,946 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:34,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:34,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-06 22:58:34,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741933073] [2021-01-06 22:58:34,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:34,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:34,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:34,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:34,948 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2021-01-06 22:58:35,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:35,406 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2021-01-06 22:58:35,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:58:35,407 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2021-01-06 22:58:35,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:35,408 INFO L225 Difference]: With dead ends: 104 [2021-01-06 22:58:35,408 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 22:58:35,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 22:58:35,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 22:58:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2021-01-06 22:58:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 22:58:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-01-06 22:58:35,412 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2021-01-06 22:58:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:35,412 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-01-06 22:58:35,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:35,413 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-01-06 22:58:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:35,413 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:35,413 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:35,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:35,625 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:35,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:35,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1814924622, now seen corresponding path program 54 times [2021-01-06 22:58:35,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:35,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973204483] [2021-01-06 22:58:35,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:35,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:35,723 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:35,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973204483] [2021-01-06 22:58:35,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567803572] [2021-01-06 22:58:35,724 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:35,782 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-01-06 22:58:35,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:35,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 22:58:35,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:58:35,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:35,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-01-06 22:58:35,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830364977] [2021-01-06 22:58:35,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:35,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:35,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:35,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:35,825 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2021-01-06 22:58:36,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:36,315 INFO L93 Difference]: Finished difference Result 97 states and 235 transitions. [2021-01-06 22:58:36,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:58:36,315 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2021-01-06 22:58:36,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:36,316 INFO L225 Difference]: With dead ends: 97 [2021-01-06 22:58:36,316 INFO L226 Difference]: Without dead ends: 91 [2021-01-06 22:58:36,317 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=442, Invalid=1040, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 22:58:36,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-01-06 22:58:36,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 70. [2021-01-06 22:58:36,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2021-01-06 22:58:36,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2021-01-06 22:58:36,320 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2021-01-06 22:58:36,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:36,320 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2021-01-06 22:58:36,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:36,320 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2021-01-06 22:58:36,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:36,321 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:36,321 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:36,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-01-06 22:58:36,522 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:36,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:36,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1814898458, now seen corresponding path program 55 times [2021-01-06 22:58:36,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:36,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722234925] [2021-01-06 22:58:36,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:36,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722234925] [2021-01-06 22:58:36,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588125854] [2021-01-06 22:58:36,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:36,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:36,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2021-01-06 22:58:36,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:36,727 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:36,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:36,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-01-06 22:58:36,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397948625] [2021-01-06 22:58:36,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-01-06 22:58:36,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:36,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-01-06 22:58:36,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-01-06 22:58:36,729 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 16 states. [2021-01-06 22:58:37,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:37,182 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2021-01-06 22:58:37,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:58:37,183 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2021-01-06 22:58:37,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:37,184 INFO L225 Difference]: With dead ends: 119 [2021-01-06 22:58:37,184 INFO L226 Difference]: Without dead ends: 113 [2021-01-06 22:58:37,185 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 22:58:37,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-01-06 22:58:37,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 75. [2021-01-06 22:58:37,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 22:58:37,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 193 transitions. [2021-01-06 22:58:37,188 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 193 transitions. Word has length 20 [2021-01-06 22:58:37,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:37,188 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 193 transitions. [2021-01-06 22:58:37,188 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2021-01-06 22:58:37,188 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 193 transitions. [2021-01-06 22:58:37,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-01-06 22:58:37,188 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:37,188 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:37,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-01-06 22:58:37,389 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:37,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:37,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1814920778, now seen corresponding path program 56 times [2021-01-06 22:58:37,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:37,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231880619] [2021-01-06 22:58:37,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:37,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:37,504 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:37,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231880619] [2021-01-06 22:58:37,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476348493] [2021-01-06 22:58:37,505 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:37,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:37,560 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:37,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 22:58:37,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:37,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:37,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:37,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-01-06 22:58:37,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831123099] [2021-01-06 22:58:37,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:58:37,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:37,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:58:37,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:58:37,606 INFO L87 Difference]: Start difference. First operand 75 states and 193 transitions. Second operand 17 states. [2021-01-06 22:58:38,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:38,245 INFO L93 Difference]: Finished difference Result 103 states and 249 transitions. [2021-01-06 22:58:38,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:58:38,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2021-01-06 22:58:38,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:38,247 INFO L225 Difference]: With dead ends: 103 [2021-01-06 22:58:38,247 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 22:58:38,247 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=462, Invalid=1178, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 22:58:38,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 22:58:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2021-01-06 22:58:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2021-01-06 22:58:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2021-01-06 22:58:38,251 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 20 [2021-01-06 22:58:38,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:38,251 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2021-01-06 22:58:38,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:58:38,251 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2021-01-06 22:58:38,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:38,252 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:38,252 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:38,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-01-06 22:58:38,467 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:38,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:38,467 INFO L82 PathProgramCache]: Analyzing trace with hash 590838995, now seen corresponding path program 57 times [2021-01-06 22:58:38,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:38,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285610371] [2021-01-06 22:58:38,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:38,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:38,613 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:38,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285610371] [2021-01-06 22:58:38,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13679295] [2021-01-06 22:58:38,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:38,669 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 22:58:38,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:38,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 22:58:38,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:38,700 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:38,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:38,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-06 22:58:38,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250856313] [2021-01-06 22:58:38,701 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:58:38,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:38,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:58:38,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:58:38,702 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 17 states. [2021-01-06 22:58:39,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:39,060 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2021-01-06 22:58:39,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:39,061 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2021-01-06 22:58:39,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:39,062 INFO L225 Difference]: With dead ends: 99 [2021-01-06 22:58:39,062 INFO L226 Difference]: Without dead ends: 93 [2021-01-06 22:58:39,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:58:39,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-01-06 22:58:39,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2021-01-06 22:58:39,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2021-01-06 22:58:39,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2021-01-06 22:58:39,065 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2021-01-06 22:58:39,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:39,065 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2021-01-06 22:58:39,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:58:39,065 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2021-01-06 22:58:39,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:39,066 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:39,066 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:39,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-01-06 22:58:39,275 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:39,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1430462795, now seen corresponding path program 58 times [2021-01-06 22:58:39,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:39,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605676059] [2021-01-06 22:58:39,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:39,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:39,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605676059] [2021-01-06 22:58:39,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273668531] [2021-01-06 22:58:39,438 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:39,490 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:39,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:39,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 22:58:39,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:39,523 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:39,523 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:39,524 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-06 22:58:39,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514311125] [2021-01-06 22:58:39,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:58:39,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:39,525 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:58:39,525 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:58:39,525 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 17 states. [2021-01-06 22:58:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:39,921 INFO L93 Difference]: Finished difference Result 110 states and 251 transitions. [2021-01-06 22:58:39,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:39,921 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2021-01-06 22:58:39,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:39,922 INFO L225 Difference]: With dead ends: 110 [2021-01-06 22:58:39,922 INFO L226 Difference]: Without dead ends: 104 [2021-01-06 22:58:39,923 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2021-01-06 22:58:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-01-06 22:58:39,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2021-01-06 22:58:39,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2021-01-06 22:58:39,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2021-01-06 22:58:39,926 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2021-01-06 22:58:39,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:39,926 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2021-01-06 22:58:39,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:58:39,926 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2021-01-06 22:58:39,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:39,926 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:39,926 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:40,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:40,127 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:40,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:40,128 INFO L82 PathProgramCache]: Analyzing trace with hash -463633469, now seen corresponding path program 59 times [2021-01-06 22:58:40,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:40,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738395736] [2021-01-06 22:58:40,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:40,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:40,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738395736] [2021-01-06 22:58:40,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780735684] [2021-01-06 22:58:40,260 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:40,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 22:58:40,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:40,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 22:58:40,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:40,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:40,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-06 22:58:40,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152776184] [2021-01-06 22:58:40,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:58:40,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:40,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:58:40,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:58:40,348 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 17 states. [2021-01-06 22:58:40,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:40,803 INFO L93 Difference]: Finished difference Result 108 states and 249 transitions. [2021-01-06 22:58:40,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:58:40,804 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2021-01-06 22:58:40,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:40,804 INFO L225 Difference]: With dead ends: 108 [2021-01-06 22:58:40,805 INFO L226 Difference]: Without dead ends: 102 [2021-01-06 22:58:40,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:58:40,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-01-06 22:58:40,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2021-01-06 22:58:40,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 22:58:40,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2021-01-06 22:58:40,808 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2021-01-06 22:58:40,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:40,808 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2021-01-06 22:58:40,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:58:40,808 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2021-01-06 22:58:40,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:40,809 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:40,809 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:41,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:41,015 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:41,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:41,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1591860165, now seen corresponding path program 60 times [2021-01-06 22:58:41,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:41,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165882357] [2021-01-06 22:58:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:41,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165882357] [2021-01-06 22:58:41,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537679962] [2021-01-06 22:58:41,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:41,222 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 22:58:41,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:41,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:58:41,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:41,254 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:41,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:41,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-06 22:58:41,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528071195] [2021-01-06 22:58:41,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:58:41,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:41,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:58:41,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:58:41,257 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 17 states. [2021-01-06 22:58:41,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:41,709 INFO L93 Difference]: Finished difference Result 106 states and 247 transitions. [2021-01-06 22:58:41,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:58:41,709 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2021-01-06 22:58:41,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:41,710 INFO L225 Difference]: With dead ends: 106 [2021-01-06 22:58:41,710 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 22:58:41,711 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:58:41,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 22:58:41,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 69. [2021-01-06 22:58:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 22:58:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2021-01-06 22:58:41,714 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2021-01-06 22:58:41,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:41,714 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2021-01-06 22:58:41,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:58:41,714 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2021-01-06 22:58:41,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:41,715 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:41,715 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:41,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:41,925 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:41,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:41,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1677950285, now seen corresponding path program 61 times [2021-01-06 22:58:41,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:41,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285608746] [2021-01-06 22:58:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:42,054 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:42,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285608746] [2021-01-06 22:58:42,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029952061] [2021-01-06 22:58:42,054 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:42,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 22:58:42,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:42,140 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:42,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:42,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-06 22:58:42,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911751971] [2021-01-06 22:58:42,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:58:42,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:42,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:58:42,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:58:42,141 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2021-01-06 22:58:42,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:42,636 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2021-01-06 22:58:42,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:58:42,637 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2021-01-06 22:58:42,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:42,638 INFO L225 Difference]: With dead ends: 104 [2021-01-06 22:58:42,638 INFO L226 Difference]: Without dead ends: 98 [2021-01-06 22:58:42,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 22:58:42,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-01-06 22:58:42,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 71. [2021-01-06 22:58:42,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 22:58:42,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2021-01-06 22:58:42,644 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2021-01-06 22:58:42,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:42,644 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2021-01-06 22:58:42,644 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:58:42,644 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2021-01-06 22:58:42,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:42,645 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:42,645 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:42,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-01-06 22:58:42,852 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:42,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:42,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1655693525, now seen corresponding path program 62 times [2021-01-06 22:58:42,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:42,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170071579] [2021-01-06 22:58:42,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:42,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:42,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170071579] [2021-01-06 22:58:42,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587096673] [2021-01-06 22:58:42,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:43,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:43,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:43,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2021-01-06 22:58:43,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:43,088 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:43,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:43,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-01-06 22:58:43,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238319243] [2021-01-06 22:58:43,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-01-06 22:58:43,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:43,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-01-06 22:58:43,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2021-01-06 22:58:43,090 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 17 states. [2021-01-06 22:58:43,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:43,634 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2021-01-06 22:58:43,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:58:43,635 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2021-01-06 22:58:43,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:43,636 INFO L225 Difference]: With dead ends: 121 [2021-01-06 22:58:43,637 INFO L226 Difference]: Without dead ends: 115 [2021-01-06 22:58:43,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 22:58:43,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2021-01-06 22:58:43,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 76. [2021-01-06 22:58:43,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2021-01-06 22:58:43,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2021-01-06 22:58:43,642 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2021-01-06 22:58:43,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:43,643 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2021-01-06 22:58:43,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2021-01-06 22:58:43,643 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2021-01-06 22:58:43,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-01-06 22:58:43,644 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:43,644 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:43,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:43,857 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:43,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:43,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1655671205, now seen corresponding path program 63 times [2021-01-06 22:58:43,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:43,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131143101] [2021-01-06 22:58:43,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:43,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:43,989 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:43,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131143101] [2021-01-06 22:58:43,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643217609] [2021-01-06 22:58:43,990 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:44,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 22:58:44,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:44,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:44,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:44,103 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:44,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:44,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2021-01-06 22:58:44,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995953630] [2021-01-06 22:58:44,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:58:44,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:44,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:58:44,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:58:44,105 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 19 states. [2021-01-06 22:58:44,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:44,885 INFO L93 Difference]: Finished difference Result 116 states and 278 transitions. [2021-01-06 22:58:44,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 22:58:44,886 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2021-01-06 22:58:44,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:44,887 INFO L225 Difference]: With dead ends: 116 [2021-01-06 22:58:44,887 INFO L226 Difference]: Without dead ends: 103 [2021-01-06 22:58:44,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=629, Invalid=1627, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 22:58:44,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-01-06 22:58:44,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2021-01-06 22:58:44,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 22:58:44,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 191 transitions. [2021-01-06 22:58:44,890 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 191 transitions. Word has length 21 [2021-01-06 22:58:44,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:44,890 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 191 transitions. [2021-01-06 22:58:44,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:58:44,891 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 191 transitions. [2021-01-06 22:58:44,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:58:44,891 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:44,891 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:45,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-01-06 22:58:45,106 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:45,106 INFO L82 PathProgramCache]: Analyzing trace with hash -985011240, now seen corresponding path program 64 times [2021-01-06 22:58:45,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:45,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240846034] [2021-01-06 22:58:45,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:45,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:45,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240846034] [2021-01-06 22:58:45,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1888669942] [2021-01-06 22:58:45,297 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:45,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:45,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:45,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:58:45,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:45,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:45,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 22:58:45,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898100276] [2021-01-06 22:58:45,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:58:45,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:45,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:58:45,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:58:45,408 INFO L87 Difference]: Start difference. First operand 75 states and 191 transitions. Second operand 19 states. [2021-01-06 22:58:45,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:45,772 INFO L93 Difference]: Finished difference Result 98 states and 237 transitions. [2021-01-06 22:58:45,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-01-06 22:58:45,773 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2021-01-06 22:58:45,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:45,774 INFO L225 Difference]: With dead ends: 98 [2021-01-06 22:58:45,774 INFO L226 Difference]: Without dead ends: 92 [2021-01-06 22:58:45,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 22:58:45,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-01-06 22:58:45,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2021-01-06 22:58:45,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 22:58:45,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2021-01-06 22:58:45,779 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2021-01-06 22:58:45,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:45,779 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2021-01-06 22:58:45,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:58:45,779 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2021-01-06 22:58:45,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:58:45,780 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:45,780 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:45,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:45,993 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:45,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:45,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1090086938, now seen corresponding path program 65 times [2021-01-06 22:58:45,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:45,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111189759] [2021-01-06 22:58:45,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:46,179 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:46,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111189759] [2021-01-06 22:58:46,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458324109] [2021-01-06 22:58:46,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:46,239 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 22:58:46,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:46,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:46,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:46,268 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:46,268 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:46,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-01-06 22:58:46,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905596266] [2021-01-06 22:58:46,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:58:46,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:46,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:58:46,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:46,270 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2021-01-06 22:58:46,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:46,588 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2021-01-06 22:58:46,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-01-06 22:58:46,589 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2021-01-06 22:58:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:46,591 INFO L225 Difference]: With dead ends: 135 [2021-01-06 22:58:46,591 INFO L226 Difference]: Without dead ends: 129 [2021-01-06 22:58:46,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2021-01-06 22:58:46,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-01-06 22:58:46,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 79. [2021-01-06 22:58:46,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 22:58:46,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2021-01-06 22:58:46,594 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2021-01-06 22:58:46,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:46,594 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2021-01-06 22:58:46,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:58:46,595 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2021-01-06 22:58:46,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:58:46,595 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:46,595 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:46,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-01-06 22:58:46,808 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:46,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:46,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1665466786, now seen corresponding path program 66 times [2021-01-06 22:58:46,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:46,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939653199] [2021-01-06 22:58:46,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:46,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:46,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939653199] [2021-01-06 22:58:46,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1935919548] [2021-01-06 22:58:46,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:47,060 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 22:58:47,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:47,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:47,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:47,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:47,087 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-01-06 22:58:47,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558426360] [2021-01-06 22:58:47,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:58:47,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:47,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:58:47,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:47,088 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2021-01-06 22:58:47,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:47,474 INFO L93 Difference]: Finished difference Result 128 states and 297 transitions. [2021-01-06 22:58:47,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:58:47,475 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2021-01-06 22:58:47,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:47,476 INFO L225 Difference]: With dead ends: 128 [2021-01-06 22:58:47,476 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 22:58:47,477 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2021-01-06 22:58:47,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 22:58:47,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 79. [2021-01-06 22:58:47,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 22:58:47,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2021-01-06 22:58:47,483 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2021-01-06 22:58:47,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:47,483 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2021-01-06 22:58:47,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:58:47,483 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2021-01-06 22:58:47,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:58:47,483 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:47,484 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:47,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:47,684 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:47,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:47,685 INFO L82 PathProgramCache]: Analyzing trace with hash -825842986, now seen corresponding path program 67 times [2021-01-06 22:58:47,685 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:47,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378261865] [2021-01-06 22:58:47,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:47,859 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:47,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378261865] [2021-01-06 22:58:47,860 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668667170] [2021-01-06 22:58:47,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:47,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:47,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:47,923 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:47,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:47,958 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-01-06 22:58:47,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646816852] [2021-01-06 22:58:47,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:58:47,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:47,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:58:47,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:47,959 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2021-01-06 22:58:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:48,412 INFO L93 Difference]: Finished difference Result 124 states and 289 transitions. [2021-01-06 22:58:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:48,413 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2021-01-06 22:58:48,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:48,414 INFO L225 Difference]: With dead ends: 124 [2021-01-06 22:58:48,414 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 22:58:48,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2021-01-06 22:58:48,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 22:58:48,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 79. [2021-01-06 22:58:48,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 22:58:48,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2021-01-06 22:58:48,417 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2021-01-06 22:58:48,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:48,418 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2021-01-06 22:58:48,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:58:48,418 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2021-01-06 22:58:48,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:58:48,418 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:48,418 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:48,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-01-06 22:58:48,620 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:48,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:48,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1575028046, now seen corresponding path program 68 times [2021-01-06 22:58:48,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:48,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256681379] [2021-01-06 22:58:48,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:48,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:48,775 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:48,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256681379] [2021-01-06 22:58:48,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58923013] [2021-01-06 22:58:48,776 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:48,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:48,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:48,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:48,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:48,878 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:48,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:48,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-01-06 22:58:48,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363747921] [2021-01-06 22:58:48,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:58:48,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:48,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:58:48,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:48,880 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2021-01-06 22:58:49,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:49,339 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2021-01-06 22:58:49,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:58:49,340 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2021-01-06 22:58:49,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:49,341 INFO L225 Difference]: With dead ends: 120 [2021-01-06 22:58:49,341 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 22:58:49,342 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-01-06 22:58:49,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 22:58:49,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 79. [2021-01-06 22:58:49,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 22:58:49,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2021-01-06 22:58:49,345 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2021-01-06 22:58:49,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:49,346 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2021-01-06 22:58:49,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:58:49,346 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2021-01-06 22:58:49,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:58:49,346 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:49,346 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:49,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-01-06 22:58:49,556 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:49,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:49,556 INFO L82 PathProgramCache]: Analyzing trace with hash 446801350, now seen corresponding path program 69 times [2021-01-06 22:58:49,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:49,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738480673] [2021-01-06 22:58:49,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:49,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:49,711 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:49,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738480673] [2021-01-06 22:58:49,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003492856] [2021-01-06 22:58:49,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:49,779 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-01-06 22:58:49,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:49,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:49,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:49,806 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:49,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:49,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-01-06 22:58:49,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659135794] [2021-01-06 22:58:49,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:58:49,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:49,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:58:49,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:49,808 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2021-01-06 22:58:50,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:50,368 INFO L93 Difference]: Finished difference Result 116 states and 273 transitions. [2021-01-06 22:58:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:58:50,369 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2021-01-06 22:58:50,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:50,370 INFO L225 Difference]: With dead ends: 116 [2021-01-06 22:58:50,370 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 22:58:50,370 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 22:58:50,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 22:58:50,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 79. [2021-01-06 22:58:50,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 22:58:50,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2021-01-06 22:58:50,374 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2021-01-06 22:58:50,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:50,374 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2021-01-06 22:58:50,374 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:58:50,374 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2021-01-06 22:58:50,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:58:50,375 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:50,375 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:50,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:50,579 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:50,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:50,579 INFO L82 PathProgramCache]: Analyzing trace with hash 360711230, now seen corresponding path program 70 times [2021-01-06 22:58:50,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:50,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499441783] [2021-01-06 22:58:50,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:50,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:50,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499441783] [2021-01-06 22:58:50,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453806201] [2021-01-06 22:58:50,711 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:50,773 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:50,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:50,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:50,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:50,797 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:50,797 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:50,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-01-06 22:58:50,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717683125] [2021-01-06 22:58:50,798 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:58:50,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:50,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:58:50,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:50,799 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2021-01-06 22:58:51,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:51,380 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2021-01-06 22:58:51,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:58:51,380 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2021-01-06 22:58:51,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:51,381 INFO L225 Difference]: With dead ends: 112 [2021-01-06 22:58:51,382 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 22:58:51,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 22:58:51,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 22:58:51,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 79. [2021-01-06 22:58:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 22:58:51,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2021-01-06 22:58:51,385 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2021-01-06 22:58:51,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:51,385 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2021-01-06 22:58:51,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:58:51,385 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2021-01-06 22:58:51,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:58:51,386 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:51,386 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:51,587 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:51,588 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:51,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:51,588 INFO L82 PathProgramCache]: Analyzing trace with hash 382967990, now seen corresponding path program 71 times [2021-01-06 22:58:51,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:51,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148849527] [2021-01-06 22:58:51,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:51,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:51,736 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:51,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148849527] [2021-01-06 22:58:51,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127793594] [2021-01-06 22:58:51,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:51,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-01-06 22:58:51,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:51,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2021-01-06 22:58:51,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:51,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:51,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-01-06 22:58:51,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1897018970] [2021-01-06 22:58:51,831 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-01-06 22:58:51,831 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:51,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-01-06 22:58:51,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-01-06 22:58:51,832 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2021-01-06 22:58:52,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:52,413 INFO L93 Difference]: Finished difference Result 129 states and 307 transitions. [2021-01-06 22:58:52,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:58:52,414 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2021-01-06 22:58:52,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:52,415 INFO L225 Difference]: With dead ends: 129 [2021-01-06 22:58:52,415 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 22:58:52,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 22:58:52,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 22:58:52,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 83. [2021-01-06 22:58:52,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 22:58:52,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 213 transitions. [2021-01-06 22:58:52,419 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 213 transitions. Word has length 22 [2021-01-06 22:58:52,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:52,419 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 213 transitions. [2021-01-06 22:58:52,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2021-01-06 22:58:52,419 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 213 transitions. [2021-01-06 22:58:52,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-01-06 22:58:52,420 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:52,420 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:52,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-01-06 22:58:52,621 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:52,621 INFO L82 PathProgramCache]: Analyzing trace with hash 382990310, now seen corresponding path program 72 times [2021-01-06 22:58:52,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:52,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833975849] [2021-01-06 22:58:52,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:52,775 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:52,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833975849] [2021-01-06 22:58:52,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651364471] [2021-01-06 22:58:52,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:52,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-01-06 22:58:52,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:52,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:58:52,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:52,877 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:52,877 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:52,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-01-06 22:58:52,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186568442] [2021-01-06 22:58:52,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-01-06 22:58:52,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:52,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-01-06 22:58:52,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-01-06 22:58:52,879 INFO L87 Difference]: Start difference. First operand 83 states and 213 transitions. Second operand 19 states. [2021-01-06 22:58:53,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:53,655 INFO L93 Difference]: Finished difference Result 113 states and 273 transitions. [2021-01-06 22:58:53,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:58:53,655 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2021-01-06 22:58:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:53,656 INFO L225 Difference]: With dead ends: 113 [2021-01-06 22:58:53,657 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 22:58:53,657 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=604, Invalid=1558, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 22:58:53,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 22:58:53,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2021-01-06 22:58:53,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2021-01-06 22:58:53,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2021-01-06 22:58:53,661 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 22 [2021-01-06 22:58:53,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:53,661 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2021-01-06 22:58:53,661 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2021-01-06 22:58:53,661 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2021-01-06 22:58:53,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:58:53,661 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:53,662 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:53,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:53,865 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:53,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:53,865 INFO L82 PathProgramCache]: Analyzing trace with hash 860606391, now seen corresponding path program 73 times [2021-01-06 22:58:53,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:53,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360179501] [2021-01-06 22:58:53,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:53,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:54,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360179501] [2021-01-06 22:58:54,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081813933] [2021-01-06 22:58:54,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:54,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:58:54,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:54,169 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:54,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:54,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 22:58:54,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199644388] [2021-01-06 22:58:54,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:58:54,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:54,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:58:54,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:58:54,170 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 20 states. [2021-01-06 22:58:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:54,556 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2021-01-06 22:58:54,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:58:54,556 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 22:58:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:54,557 INFO L225 Difference]: With dead ends: 107 [2021-01-06 22:58:54,557 INFO L226 Difference]: Without dead ends: 101 [2021-01-06 22:58:54,558 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=401, Invalid=1005, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:58:54,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-01-06 22:58:54,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2021-01-06 22:58:54,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2021-01-06 22:58:54,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2021-01-06 22:58:54,560 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2021-01-06 22:58:54,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:54,561 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2021-01-06 22:58:54,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:58:54,561 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2021-01-06 22:58:54,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:58:54,561 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:54,561 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:54,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-01-06 22:58:54,762 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:54,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:54,763 INFO L82 PathProgramCache]: Analyzing trace with hash 285226543, now seen corresponding path program 74 times [2021-01-06 22:58:54,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:54,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526088385] [2021-01-06 22:58:54,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:54,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526088385] [2021-01-06 22:58:54,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997430556] [2021-01-06 22:58:54,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:55,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:58:55,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:55,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:58:55,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:55,051 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:55,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:55,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 22:58:55,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821634582] [2021-01-06 22:58:55,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:58:55,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:55,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:58:55,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:58:55,052 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2021-01-06 22:58:55,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:55,514 INFO L93 Difference]: Finished difference Result 120 states and 273 transitions. [2021-01-06 22:58:55,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:58:55,515 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 22:58:55,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:55,516 INFO L225 Difference]: With dead ends: 120 [2021-01-06 22:58:55,516 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 22:58:55,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=452, Invalid=1188, Unknown=0, NotChecked=0, Total=1640 [2021-01-06 22:58:55,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 22:58:55,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 69. [2021-01-06 22:58:55,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2021-01-06 22:58:55,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2021-01-06 22:58:55,519 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2021-01-06 22:58:55,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:55,519 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2021-01-06 22:58:55,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:58:55,519 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2021-01-06 22:58:55,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:58:55,519 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:55,520 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:55,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:55,720 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:55,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:55,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1124850343, now seen corresponding path program 75 times [2021-01-06 22:58:55,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:55,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329253809] [2021-01-06 22:58:55,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:55,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:55,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329253809] [2021-01-06 22:58:55,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277311242] [2021-01-06 22:58:55,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:55,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 22:58:55,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:55,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:58:55,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:55,982 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:55,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:55,983 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 22:58:55,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130668591] [2021-01-06 22:58:55,983 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:58:55,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:55,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:58:55,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:58:55,984 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2021-01-06 22:58:56,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:56,480 INFO L93 Difference]: Finished difference Result 118 states and 271 transitions. [2021-01-06 22:58:56,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:58:56,480 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 22:58:56,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:56,482 INFO L225 Difference]: With dead ends: 118 [2021-01-06 22:58:56,482 INFO L226 Difference]: Without dead ends: 112 [2021-01-06 22:58:56,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=491, Invalid=1315, Unknown=0, NotChecked=0, Total=1806 [2021-01-06 22:58:56,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-01-06 22:58:56,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 71. [2021-01-06 22:58:56,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2021-01-06 22:58:56,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2021-01-06 22:58:56,486 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2021-01-06 22:58:56,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:56,486 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2021-01-06 22:58:56,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:58:56,486 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2021-01-06 22:58:56,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:58:56,486 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:56,487 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:56,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-01-06 22:58:56,687 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:56,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:56,688 INFO L82 PathProgramCache]: Analyzing trace with hash -769245921, now seen corresponding path program 76 times [2021-01-06 22:58:56,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:56,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355494040] [2021-01-06 22:58:56,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:56,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:56,849 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:56,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355494040] [2021-01-06 22:58:56,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245620354] [2021-01-06 22:58:56,850 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:56,915 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:58:56,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:56,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:58:56,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:56,958 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:56,959 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 22:58:56,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771901137] [2021-01-06 22:58:56,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:58:56,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:56,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:58:56,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:58:56,961 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2021-01-06 22:58:57,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:57,510 INFO L93 Difference]: Finished difference Result 116 states and 269 transitions. [2021-01-06 22:58:57,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:58:57,511 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 22:58:57,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:57,513 INFO L225 Difference]: With dead ends: 116 [2021-01-06 22:58:57,513 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 22:58:57,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1434, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 22:58:57,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 22:58:57,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2021-01-06 22:58:57,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 22:58:57,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2021-01-06 22:58:57,517 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2021-01-06 22:58:57,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:57,517 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2021-01-06 22:58:57,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:58:57,517 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2021-01-06 22:58:57,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:58:57,517 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:57,518 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:57,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:57,732 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:57,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:57,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1897472617, now seen corresponding path program 77 times [2021-01-06 22:58:57,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:57,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079168442] [2021-01-06 22:58:57,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:57,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:57,884 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:57,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079168442] [2021-01-06 22:58:57,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547473846] [2021-01-06 22:58:57,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:57,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 22:58:57,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:57,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:58:57,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:57,991 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:57,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:57,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 22:58:57,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795221428] [2021-01-06 22:58:57,992 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:58:57,992 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:57,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:58:57,993 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:58:57,993 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2021-01-06 22:58:58,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:58,579 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2021-01-06 22:58:58,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:58:58,580 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 22:58:58,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:58,581 INFO L225 Difference]: With dead ends: 114 [2021-01-06 22:58:58,581 INFO L226 Difference]: Without dead ends: 108 [2021-01-06 22:58:58,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 22:58:58,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-01-06 22:58:58,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2021-01-06 22:58:58,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 22:58:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2021-01-06 22:58:58,586 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2021-01-06 22:58:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:58,586 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2021-01-06 22:58:58,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:58:58,587 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2021-01-06 22:58:58,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:58:58,587 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:58,587 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:58,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-01-06 22:58:58,801 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:58,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:58,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1983562737, now seen corresponding path program 78 times [2021-01-06 22:58:58,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:58,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316861566] [2021-01-06 22:58:58,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:58:58,975 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:58,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316861566] [2021-01-06 22:58:58,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445897212] [2021-01-06 22:58:58,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:58:59,039 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 22:58:59,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:58:59,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:58:59,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:58:59,081 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:58:59,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:58:59,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 22:58:59,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988533686] [2021-01-06 22:58:59,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:58:59,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:58:59,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:58:59,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:58:59,083 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2021-01-06 22:58:59,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:58:59,711 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2021-01-06 22:58:59,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 22:58:59,712 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 22:58:59,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:58:59,713 INFO L225 Difference]: With dead ends: 112 [2021-01-06 22:58:59,713 INFO L226 Difference]: Without dead ends: 106 [2021-01-06 22:58:59,714 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=704, Invalid=1648, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 22:58:59,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-01-06 22:58:59,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2021-01-06 22:58:59,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 22:58:59,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2021-01-06 22:58:59,716 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2021-01-06 22:58:59,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:58:59,716 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2021-01-06 22:58:59,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:58:59,716 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2021-01-06 22:58:59,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:58:59,717 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:58:59,717 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:58:59,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:58:59,917 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:58:59,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:58:59,918 INFO L82 PathProgramCache]: Analyzing trace with hash -1961305977, now seen corresponding path program 79 times [2021-01-06 22:58:59,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:58:59,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [923733534] [2021-01-06 22:58:59,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:58:59,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:00,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [923733534] [2021-01-06 22:59:00,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839143739] [2021-01-06 22:59:00,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:00,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:00,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2021-01-06 22:59:00,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:00,157 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:00,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:00,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-01-06 22:59:00,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166712567] [2021-01-06 22:59:00,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-01-06 22:59:00,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:00,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-01-06 22:59:00,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2021-01-06 22:59:00,159 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2021-01-06 22:59:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:00,879 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2021-01-06 22:59:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 22:59:00,879 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2021-01-06 22:59:00,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:00,880 INFO L225 Difference]: With dead ends: 129 [2021-01-06 22:59:00,880 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 22:59:00,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 22:59:00,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 22:59:00,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 82. [2021-01-06 22:59:00,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2021-01-06 22:59:00,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2021-01-06 22:59:00,887 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2021-01-06 22:59:00,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:00,887 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2021-01-06 22:59:00,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2021-01-06 22:59:00,887 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2021-01-06 22:59:00,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-01-06 22:59:00,887 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:00,888 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:01,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:01,103 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:01,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:01,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1961283657, now seen corresponding path program 80 times [2021-01-06 22:59:01,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:01,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088873096] [2021-01-06 22:59:01,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:01,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:01,249 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:01,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088873096] [2021-01-06 22:59:01,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435984899] [2021-01-06 22:59:01,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:01,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:59:01,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:01,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:01,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:01,362 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:01,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:01,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2021-01-06 22:59:01,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852922961] [2021-01-06 22:59:01,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:01,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:01,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:01,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:01,364 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 21 states. [2021-01-06 22:59:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:02,299 INFO L93 Difference]: Finished difference Result 124 states and 298 transitions. [2021-01-06 22:59:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 22:59:02,300 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2021-01-06 22:59:02,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:02,301 INFO L225 Difference]: With dead ends: 124 [2021-01-06 22:59:02,301 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 22:59:02,302 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=793, Invalid=2069, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 22:59:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 22:59:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 81. [2021-01-06 22:59:02,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 22:59:02,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 207 transitions. [2021-01-06 22:59:02,304 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 207 transitions. Word has length 23 [2021-01-06 22:59:02,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:02,304 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 207 transitions. [2021-01-06 22:59:02,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:02,304 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 207 transitions. [2021-01-06 22:59:02,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:02,305 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:02,305 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:02,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:02,505 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:02,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:02,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1702981252, now seen corresponding path program 81 times [2021-01-06 22:59:02,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:02,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67404969] [2021-01-06 22:59:02,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:02,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:02,761 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:02,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67404969] [2021-01-06 22:59:02,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653666904] [2021-01-06 22:59:02,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:02,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 22:59:02,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:02,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:02,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:02,903 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:02,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:02,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-01-06 22:59:02,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766156991] [2021-01-06 22:59:02,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:02,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:02,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:02,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:02,904 INFO L87 Difference]: Start difference. First operand 81 states and 207 transitions. Second operand 22 states. [2021-01-06 22:59:03,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:03,349 INFO L93 Difference]: Finished difference Result 106 states and 257 transitions. [2021-01-06 22:59:03,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-01-06 22:59:03,350 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2021-01-06 22:59:03,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:03,351 INFO L225 Difference]: With dead ends: 106 [2021-01-06 22:59:03,352 INFO L226 Difference]: Without dead ends: 100 [2021-01-06 22:59:03,352 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=489, Invalid=1071, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:59:03,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-01-06 22:59:03,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2021-01-06 22:59:03,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 22:59:03,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2021-01-06 22:59:03,363 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2021-01-06 22:59:03,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:03,364 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2021-01-06 22:59:03,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:03,364 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2021-01-06 22:59:03,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:03,364 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:03,364 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:03,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:03,565 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:03,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:03,566 INFO L82 PathProgramCache]: Analyzing trace with hash 398488074, now seen corresponding path program 82 times [2021-01-06 22:59:03,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:03,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788471651] [2021-01-06 22:59:03,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:03,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:03,805 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:03,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788471651] [2021-01-06 22:59:03,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627761220] [2021-01-06 22:59:03,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:03,859 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:59:03,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:03,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:03,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:03,911 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:03,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:03,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:03,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544032348] [2021-01-06 22:59:03,913 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:03,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:03,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:03,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:03,913 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2021-01-06 22:59:04,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:04,346 INFO L93 Difference]: Finished difference Result 147 states and 339 transitions. [2021-01-06 22:59:04,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-01-06 22:59:04,346 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:04,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:04,347 INFO L225 Difference]: With dead ends: 147 [2021-01-06 22:59:04,347 INFO L226 Difference]: Without dead ends: 141 [2021-01-06 22:59:04,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=431, Invalid=975, Unknown=0, NotChecked=0, Total=1406 [2021-01-06 22:59:04,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2021-01-06 22:59:04,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 85. [2021-01-06 22:59:04,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 22:59:04,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2021-01-06 22:59:04,356 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2021-01-06 22:59:04,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:04,356 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2021-01-06 22:59:04,356 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:04,356 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2021-01-06 22:59:04,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:04,357 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:04,357 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:04,558 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:04,558 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:04,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:04,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1509235330, now seen corresponding path program 83 times [2021-01-06 22:59:04,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:04,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320280249] [2021-01-06 22:59:04,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:04,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320280249] [2021-01-06 22:59:04,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967035012] [2021-01-06 22:59:04,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:04,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 22:59:04,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:04,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:04,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:04,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:04,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:04,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115601168] [2021-01-06 22:59:04,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:04,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:04,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:04,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:04,919 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2021-01-06 22:59:05,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:05,379 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2021-01-06 22:59:05,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:59:05,380 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:05,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:05,381 INFO L225 Difference]: With dead ends: 140 [2021-01-06 22:59:05,381 INFO L226 Difference]: Without dead ends: 134 [2021-01-06 22:59:05,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=1121, Unknown=0, NotChecked=0, Total=1560 [2021-01-06 22:59:05,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-01-06 22:59:05,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 85. [2021-01-06 22:59:05,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 22:59:05,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2021-01-06 22:59:05,386 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2021-01-06 22:59:05,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:05,386 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2021-01-06 22:59:05,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:05,386 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2021-01-06 22:59:05,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:05,386 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:05,387 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:05,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:05,602 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:05,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:05,602 INFO L82 PathProgramCache]: Analyzing trace with hash 933855482, now seen corresponding path program 84 times [2021-01-06 22:59:05,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:05,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87359896] [2021-01-06 22:59:05,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:05,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:05,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87359896] [2021-01-06 22:59:05,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223842925] [2021-01-06 22:59:05,796 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:05,860 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 22:59:05,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:05,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:05,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:05,908 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:05,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:05,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:05,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594942858] [2021-01-06 22:59:05,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:05,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:05,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:05,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:05,910 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2021-01-06 22:59:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:06,415 INFO L93 Difference]: Finished difference Result 136 states and 317 transitions. [2021-01-06 22:59:06,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:59:06,416 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:06,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:06,417 INFO L225 Difference]: With dead ends: 136 [2021-01-06 22:59:06,417 INFO L226 Difference]: Without dead ends: 130 [2021-01-06 22:59:06,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 22:59:06,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-01-06 22:59:06,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 85. [2021-01-06 22:59:06,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 22:59:06,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2021-01-06 22:59:06,421 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2021-01-06 22:59:06,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:06,421 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2021-01-06 22:59:06,421 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:06,421 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2021-01-06 22:59:06,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:06,422 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:06,422 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:06,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:06,637 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:06,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:06,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1773479282, now seen corresponding path program 85 times [2021-01-06 22:59:06,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:06,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916764002] [2021-01-06 22:59:06,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:06,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:06,822 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:06,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916764002] [2021-01-06 22:59:06,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [24043662] [2021-01-06 22:59:06,824 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:06,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:06,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:06,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:06,927 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:06,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:06,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245214565] [2021-01-06 22:59:06,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:06,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:06,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:06,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:06,928 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2021-01-06 22:59:07,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:07,499 INFO L93 Difference]: Finished difference Result 132 states and 309 transitions. [2021-01-06 22:59:07,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:59:07,500 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:07,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:07,501 INFO L225 Difference]: With dead ends: 132 [2021-01-06 22:59:07,501 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 22:59:07,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 22:59:07,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 22:59:07,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 85. [2021-01-06 22:59:07,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 22:59:07,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2021-01-06 22:59:07,505 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2021-01-06 22:59:07,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:07,505 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2021-01-06 22:59:07,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:07,505 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2021-01-06 22:59:07,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:07,506 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:07,506 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:07,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-01-06 22:59:07,720 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:07,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:07,720 INFO L82 PathProgramCache]: Analyzing trace with hash -120616982, now seen corresponding path program 86 times [2021-01-06 22:59:07,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:07,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684635553] [2021-01-06 22:59:07,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:07,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:07,906 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:07,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684635553] [2021-01-06 22:59:07,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051299453] [2021-01-06 22:59:07,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:07,964 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:59:07,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:07,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:07,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:08,007 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:08,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:08,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:08,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89630659] [2021-01-06 22:59:08,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:08,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:08,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:08,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:08,009 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2021-01-06 22:59:08,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:08,650 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2021-01-06 22:59:08,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:59:08,651 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:08,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:08,652 INFO L225 Difference]: With dead ends: 128 [2021-01-06 22:59:08,653 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 22:59:08,653 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=559, Invalid=1511, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 22:59:08,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 22:59:08,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 85. [2021-01-06 22:59:08,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 22:59:08,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2021-01-06 22:59:08,656 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2021-01-06 22:59:08,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:08,657 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2021-01-06 22:59:08,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:08,657 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2021-01-06 22:59:08,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:08,657 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:08,657 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:08,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:08,860 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:08,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:08,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1248843678, now seen corresponding path program 87 times [2021-01-06 22:59:08,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:08,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7704919] [2021-01-06 22:59:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:09,062 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:09,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7704919] [2021-01-06 22:59:09,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573488190] [2021-01-06 22:59:09,064 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:09,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-01-06 22:59:09,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:09,139 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:09,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:09,187 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:09,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:09,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:09,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066597255] [2021-01-06 22:59:09,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:09,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:09,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:09,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:09,189 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2021-01-06 22:59:09,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:09,871 INFO L93 Difference]: Finished difference Result 124 states and 293 transitions. [2021-01-06 22:59:09,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:59:09,872 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:09,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:09,873 INFO L225 Difference]: With dead ends: 124 [2021-01-06 22:59:09,873 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 22:59:09,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=631, Invalid=1625, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 22:59:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 22:59:09,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 85. [2021-01-06 22:59:09,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 22:59:09,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2021-01-06 22:59:09,876 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2021-01-06 22:59:09,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:09,877 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2021-01-06 22:59:09,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:09,877 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2021-01-06 22:59:09,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:09,877 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:09,878 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:10,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-01-06 22:59:10,094 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:10,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:10,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1334933798, now seen corresponding path program 88 times [2021-01-06 22:59:10,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:10,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884721299] [2021-01-06 22:59:10,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:10,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:10,258 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:10,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884721299] [2021-01-06 22:59:10,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605184016] [2021-01-06 22:59:10,258 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:10,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:59:10,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:10,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:10,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:10,359 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:10,360 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:10,360 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:10,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94834949] [2021-01-06 22:59:10,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:10,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:10,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:10,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:10,361 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2021-01-06 22:59:11,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:11,085 INFO L93 Difference]: Finished difference Result 120 states and 285 transitions. [2021-01-06 22:59:11,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 22:59:11,086 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:11,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:11,087 INFO L225 Difference]: With dead ends: 120 [2021-01-06 22:59:11,088 INFO L226 Difference]: Without dead ends: 114 [2021-01-06 22:59:11,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=719, Invalid=1731, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 22:59:11,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-01-06 22:59:11,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2021-01-06 22:59:11,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 22:59:11,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2021-01-06 22:59:11,091 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2021-01-06 22:59:11,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:11,092 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2021-01-06 22:59:11,092 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:11,092 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2021-01-06 22:59:11,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:11,092 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:11,093 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:11,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:11,307 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:11,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:11,307 INFO L82 PathProgramCache]: Analyzing trace with hash -1312677038, now seen corresponding path program 89 times [2021-01-06 22:59:11,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:11,308 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253776616] [2021-01-06 22:59:11,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:11,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:11,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253776616] [2021-01-06 22:59:11,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368682122] [2021-01-06 22:59:11,469 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:11,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-01-06 22:59:11,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:11,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:11,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:11,574 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:11,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:11,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-01-06 22:59:11,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050296450] [2021-01-06 22:59:11,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-01-06 22:59:11,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:11,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-01-06 22:59:11,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-01-06 22:59:11,575 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2021-01-06 22:59:12,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:12,246 INFO L93 Difference]: Finished difference Result 137 states and 327 transitions. [2021-01-06 22:59:12,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 22:59:12,247 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2021-01-06 22:59:12,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:12,248 INFO L225 Difference]: With dead ends: 137 [2021-01-06 22:59:12,248 INFO L226 Difference]: Without dead ends: 131 [2021-01-06 22:59:12,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=823, Invalid=1829, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 22:59:12,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2021-01-06 22:59:12,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 89. [2021-01-06 22:59:12,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 22:59:12,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 229 transitions. [2021-01-06 22:59:12,251 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 229 transitions. Word has length 24 [2021-01-06 22:59:12,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:12,251 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 229 transitions. [2021-01-06 22:59:12,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2021-01-06 22:59:12,251 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 229 transitions. [2021-01-06 22:59:12,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-01-06 22:59:12,252 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:12,252 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:12,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:12,466 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:12,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:12,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1312654718, now seen corresponding path program 90 times [2021-01-06 22:59:12,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:12,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726550696] [2021-01-06 22:59:12,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:12,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726550696] [2021-01-06 22:59:12,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980408922] [2021-01-06 22:59:12,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:12,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-01-06 22:59:12,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:12,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:12,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:12,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:12,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-01-06 22:59:12,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66636451] [2021-01-06 22:59:12,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:12,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:12,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:12,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:12,776 INFO L87 Difference]: Start difference. First operand 89 states and 229 transitions. Second operand 22 states. [2021-01-06 22:59:13,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:13,786 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2021-01-06 22:59:13,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 22:59:13,787 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2021-01-06 22:59:13,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:13,788 INFO L225 Difference]: With dead ends: 133 [2021-01-06 22:59:13,788 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 22:59:13,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=806, Invalid=2164, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 22:59:13,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 22:59:13,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2021-01-06 22:59:13,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2021-01-06 22:59:13,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 176 transitions. [2021-01-06 22:59:13,792 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 176 transitions. Word has length 24 [2021-01-06 22:59:13,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:13,792 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 176 transitions. [2021-01-06 22:59:13,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:13,792 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 176 transitions. [2021-01-06 22:59:13,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 22:59:13,793 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:13,793 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:13,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:13,993 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:13,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:13,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1885931109, now seen corresponding path program 91 times [2021-01-06 22:59:13,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:13,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036182839] [2021-01-06 22:59:13,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:14,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:14,238 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:14,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036182839] [2021-01-06 22:59:14,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951752407] [2021-01-06 22:59:14,238 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:14,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:14,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:14,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:14,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:14,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 22:59:14,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132818884] [2021-01-06 22:59:14,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:14,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:14,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:14,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:14,346 INFO L87 Difference]: Start difference. First operand 72 states and 176 transitions. Second operand 22 states. [2021-01-06 22:59:14,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:14,870 INFO L93 Difference]: Finished difference Result 117 states and 267 transitions. [2021-01-06 22:59:14,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:59:14,870 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2021-01-06 22:59:14,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:14,871 INFO L225 Difference]: With dead ends: 117 [2021-01-06 22:59:14,871 INFO L226 Difference]: Without dead ends: 111 [2021-01-06 22:59:14,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=493, Invalid=1229, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 22:59:14,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-01-06 22:59:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 73. [2021-01-06 22:59:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2021-01-06 22:59:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 179 transitions. [2021-01-06 22:59:14,875 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 179 transitions. Word has length 25 [2021-01-06 22:59:14,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:14,876 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 179 transitions. [2021-01-06 22:59:14,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 179 transitions. [2021-01-06 22:59:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 22:59:14,876 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:14,876 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:15,089 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:15,090 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:15,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:15,090 INFO L82 PathProgramCache]: Analyzing trace with hash -775183853, now seen corresponding path program 92 times [2021-01-06 22:59:15,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:15,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463076381] [2021-01-06 22:59:15,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:15,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:15,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463076381] [2021-01-06 22:59:15,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293747] [2021-01-06 22:59:15,323 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/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 [2021-01-06 22:59:15,384 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:59:15,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:15,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:15,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:15,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:15,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 22:59:15,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837287119] [2021-01-06 22:59:15,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:15,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:15,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:15,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:15,449 INFO L87 Difference]: Start difference. First operand 73 states and 179 transitions. Second operand 22 states. [2021-01-06 22:59:15,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:15,995 INFO L93 Difference]: Finished difference Result 132 states and 299 transitions. [2021-01-06 22:59:15,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:59:15,996 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2021-01-06 22:59:15,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:15,997 INFO L225 Difference]: With dead ends: 132 [2021-01-06 22:59:15,997 INFO L226 Difference]: Without dead ends: 126 [2021-01-06 22:59:15,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1435, Unknown=0, NotChecked=0, Total=1980 [2021-01-06 22:59:15,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-01-06 22:59:15,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 75. [2021-01-06 22:59:16,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2021-01-06 22:59:16,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2021-01-06 22:59:16,000 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 25 [2021-01-06 22:59:16,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:16,000 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2021-01-06 22:59:16,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:16,000 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2021-01-06 22:59:16,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 22:59:16,001 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:16,001 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:16,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:16,210 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:16,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:16,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1350563701, now seen corresponding path program 93 times [2021-01-06 22:59:16,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:16,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970366838] [2021-01-06 22:59:16,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:16,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:16,417 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:16,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970366838] [2021-01-06 22:59:16,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101624283] [2021-01-06 22:59:16,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:16,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 22:59:16,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:16,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:16,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:16,529 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:16,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:16,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 22:59:16,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000896357] [2021-01-06 22:59:16,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:16,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:16,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:16,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:16,530 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 22 states. [2021-01-06 22:59:17,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:17,066 INFO L93 Difference]: Finished difference Result 130 states and 297 transitions. [2021-01-06 22:59:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:59:17,067 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2021-01-06 22:59:17,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:17,067 INFO L225 Difference]: With dead ends: 130 [2021-01-06 22:59:17,068 INFO L226 Difference]: Without dead ends: 124 [2021-01-06 22:59:17,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=582, Invalid=1580, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 22:59:17,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-01-06 22:59:17,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 77. [2021-01-06 22:59:17,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2021-01-06 22:59:17,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2021-01-06 22:59:17,071 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 25 [2021-01-06 22:59:17,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:17,071 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2021-01-06 22:59:17,071 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:17,071 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2021-01-06 22:59:17,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 22:59:17,071 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:17,072 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:17,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:17,278 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:17,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:17,279 INFO L82 PathProgramCache]: Analyzing trace with hash -510939901, now seen corresponding path program 94 times [2021-01-06 22:59:17,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:17,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219984157] [2021-01-06 22:59:17,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:17,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:17,489 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:17,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219984157] [2021-01-06 22:59:17,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707956178] [2021-01-06 22:59:17,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:17,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:59:17,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:17,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:17,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:17,597 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:17,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:17,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 22:59:17,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270237071] [2021-01-06 22:59:17,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:17,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:17,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:17,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:17,599 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 22 states. [2021-01-06 22:59:18,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:18,262 INFO L93 Difference]: Finished difference Result 128 states and 295 transitions. [2021-01-06 22:59:18,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:59:18,262 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2021-01-06 22:59:18,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:18,264 INFO L225 Difference]: With dead ends: 128 [2021-01-06 22:59:18,264 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 22:59:18,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=635, Invalid=1717, Unknown=0, NotChecked=0, Total=2352 [2021-01-06 22:59:18,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 22:59:18,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 79. [2021-01-06 22:59:18,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2021-01-06 22:59:18,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2021-01-06 22:59:18,267 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 25 [2021-01-06 22:59:18,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:18,268 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2021-01-06 22:59:18,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:18,268 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2021-01-06 22:59:18,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 22:59:18,268 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:18,268 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:18,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-01-06 22:59:18,469 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:18,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:18,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1889931131, now seen corresponding path program 95 times [2021-01-06 22:59:18,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:18,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924131678] [2021-01-06 22:59:18,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:18,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:18,681 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:18,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924131678] [2021-01-06 22:59:18,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677510170] [2021-01-06 22:59:18,682 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:18,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 22:59:18,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:18,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:18,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:18,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:18,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 22:59:18,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311891560] [2021-01-06 22:59:18,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:18,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:18,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:18,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:18,793 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 22 states. [2021-01-06 22:59:19,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:19,491 INFO L93 Difference]: Finished difference Result 126 states and 293 transitions. [2021-01-06 22:59:19,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 22:59:19,491 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2021-01-06 22:59:19,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:19,493 INFO L225 Difference]: With dead ends: 126 [2021-01-06 22:59:19,493 INFO L226 Difference]: Without dead ends: 120 [2021-01-06 22:59:19,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=704, Invalid=1846, Unknown=0, NotChecked=0, Total=2550 [2021-01-06 22:59:19,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-01-06 22:59:19,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 81. [2021-01-06 22:59:19,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2021-01-06 22:59:19,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2021-01-06 22:59:19,496 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 25 [2021-01-06 22:59:19,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:19,497 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2021-01-06 22:59:19,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:19,497 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2021-01-06 22:59:19,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 22:59:19,497 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:19,497 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:19,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:19,702 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:19,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:19,702 INFO L82 PathProgramCache]: Analyzing trace with hash 761704435, now seen corresponding path program 96 times [2021-01-06 22:59:19,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:19,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005939148] [2021-01-06 22:59:19,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:19,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:19,911 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:19,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005939148] [2021-01-06 22:59:19,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486432345] [2021-01-06 22:59:19,912 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:19,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 22:59:19,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:19,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:19,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:20,026 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:20,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:20,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 22:59:20,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355090696] [2021-01-06 22:59:20,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:20,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:20,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:20,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:20,028 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 22 states. [2021-01-06 22:59:20,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:20,795 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2021-01-06 22:59:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 22:59:20,796 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2021-01-06 22:59:20,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:20,797 INFO L225 Difference]: With dead ends: 124 [2021-01-06 22:59:20,797 INFO L226 Difference]: Without dead ends: 118 [2021-01-06 22:59:20,797 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=789, Invalid=1967, Unknown=0, NotChecked=0, Total=2756 [2021-01-06 22:59:20,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-01-06 22:59:20,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 83. [2021-01-06 22:59:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2021-01-06 22:59:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2021-01-06 22:59:20,801 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 25 [2021-01-06 22:59:20,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:20,801 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2021-01-06 22:59:20,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:20,801 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2021-01-06 22:59:20,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 22:59:20,802 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:20,802 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:21,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-01-06 22:59:21,017 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:21,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:21,017 INFO L82 PathProgramCache]: Analyzing trace with hash 675614315, now seen corresponding path program 97 times [2021-01-06 22:59:21,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:21,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885509836] [2021-01-06 22:59:21,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:21,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:21,203 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:21,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885509836] [2021-01-06 22:59:21,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614380977] [2021-01-06 22:59:21,204 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:21,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:21,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:21,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:21,317 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:21,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:21,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 22:59:21,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767109549] [2021-01-06 22:59:21,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:21,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:21,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:21,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:21,319 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 22 states. [2021-01-06 22:59:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:22,139 INFO L93 Difference]: Finished difference Result 123 states and 291 transitions. [2021-01-06 22:59:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 22:59:22,140 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2021-01-06 22:59:22,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:22,141 INFO L225 Difference]: With dead ends: 123 [2021-01-06 22:59:22,141 INFO L226 Difference]: Without dead ends: 117 [2021-01-06 22:59:22,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=890, Invalid=2080, Unknown=0, NotChecked=0, Total=2970 [2021-01-06 22:59:22,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2021-01-06 22:59:22,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 85. [2021-01-06 22:59:22,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2021-01-06 22:59:22,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 216 transitions. [2021-01-06 22:59:22,145 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 216 transitions. Word has length 25 [2021-01-06 22:59:22,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:22,145 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 216 transitions. [2021-01-06 22:59:22,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:22,145 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 216 transitions. [2021-01-06 22:59:22,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-01-06 22:59:22,146 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:22,146 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:22,359 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:22,359 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:22,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:22,360 INFO L82 PathProgramCache]: Analyzing trace with hash 697897239, now seen corresponding path program 98 times [2021-01-06 22:59:22,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:22,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096517898] [2021-01-06 22:59:22,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:22,538 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:22,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096517898] [2021-01-06 22:59:22,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256094173] [2021-01-06 22:59:22,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:22,599 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:59:22,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:22,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2021-01-06 22:59:22,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:22,640 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:59:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:22,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:22,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2021-01-06 22:59:22,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067858008] [2021-01-06 22:59:22,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:22,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:22,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:22,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:22,659 INFO L87 Difference]: Start difference. First operand 85 states and 216 transitions. Second operand 22 states. [2021-01-06 22:59:23,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:23,618 INFO L93 Difference]: Finished difference Result 134 states and 324 transitions. [2021-01-06 22:59:23,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-01-06 22:59:23,619 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2021-01-06 22:59:23,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:23,620 INFO L225 Difference]: With dead ends: 134 [2021-01-06 22:59:23,620 INFO L226 Difference]: Without dead ends: 123 [2021-01-06 22:59:23,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=978, Invalid=2102, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 22:59:23,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2021-01-06 22:59:23,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 89. [2021-01-06 22:59:23,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2021-01-06 22:59:23,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2021-01-06 22:59:23,624 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 25 [2021-01-06 22:59:23,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:23,624 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2021-01-06 22:59:23,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:23,625 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2021-01-06 22:59:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:23,625 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:23,625 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:23,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-01-06 22:59:23,832 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:23,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:23,832 INFO L82 PathProgramCache]: Analyzing trace with hash -182428128, now seen corresponding path program 99 times [2021-01-06 22:59:23,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:23,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317884117] [2021-01-06 22:59:23,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:24,135 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:24,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317884117] [2021-01-06 22:59:24,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762829765] [2021-01-06 22:59:24,136 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:24,195 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 22:59:24,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:24,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 22:59:24,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:24,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:24,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-01-06 22:59:24,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301557524] [2021-01-06 22:59:24,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 22:59:24,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:24,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 22:59:24,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:59:24,277 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 24 states. [2021-01-06 22:59:24,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:24,802 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2021-01-06 22:59:24,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:59:24,803 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2021-01-06 22:59:24,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:24,804 INFO L225 Difference]: With dead ends: 116 [2021-01-06 22:59:24,804 INFO L226 Difference]: Without dead ends: 110 [2021-01-06 22:59:24,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=592, Invalid=1300, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 22:59:24,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-01-06 22:59:24,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2021-01-06 22:59:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 22:59:24,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2021-01-06 22:59:24,808 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2021-01-06 22:59:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:24,808 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2021-01-06 22:59:24,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 22:59:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2021-01-06 22:59:24,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:24,808 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:24,809 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:25,010 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-01-06 22:59:25,011 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:25,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:25,011 INFO L82 PathProgramCache]: Analyzing trace with hash 694965038, now seen corresponding path program 100 times [2021-01-06 22:59:25,011 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:25,012 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973100122] [2021-01-06 22:59:25,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:25,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973100122] [2021-01-06 22:59:25,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642608156] [2021-01-06 22:59:25,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:25,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:59:25,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:25,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:25,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:25,406 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:25,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:25,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 22:59:25,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922310757] [2021-01-06 22:59:25,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 22:59:25,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:25,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 22:59:25,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:59:25,408 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2021-01-06 22:59:25,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:25,912 INFO L93 Difference]: Finished difference Result 161 states and 369 transitions. [2021-01-06 22:59:25,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-01-06 22:59:25,913 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2021-01-06 22:59:25,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:25,914 INFO L225 Difference]: With dead ends: 161 [2021-01-06 22:59:25,914 INFO L226 Difference]: Without dead ends: 155 [2021-01-06 22:59:25,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=1194, Unknown=0, NotChecked=0, Total=1722 [2021-01-06 22:59:25,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2021-01-06 22:59:25,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 93. [2021-01-06 22:59:25,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 22:59:25,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2021-01-06 22:59:25,918 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2021-01-06 22:59:25,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:25,918 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2021-01-06 22:59:25,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 22:59:25,918 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2021-01-06 22:59:25,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:25,919 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:25,919 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:26,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-01-06 22:59:26,134 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:26,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:26,134 INFO L82 PathProgramCache]: Analyzing trace with hash -1323778650, now seen corresponding path program 101 times [2021-01-06 22:59:26,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:26,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870309722] [2021-01-06 22:59:26,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:26,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:26,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870309722] [2021-01-06 22:59:26,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586553769] [2021-01-06 22:59:26,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:26,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 22:59:26,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:26,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:26,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:26,526 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:26,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:26,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 22:59:26,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655356519] [2021-01-06 22:59:26,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 22:59:26,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:26,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 22:59:26,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:59:26,528 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2021-01-06 22:59:27,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:27,079 INFO L93 Difference]: Finished difference Result 154 states and 355 transitions. [2021-01-06 22:59:27,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-01-06 22:59:27,080 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2021-01-06 22:59:27,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:27,080 INFO L225 Difference]: With dead ends: 154 [2021-01-06 22:59:27,081 INFO L226 Difference]: Without dead ends: 148 [2021-01-06 22:59:27,081 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=534, Invalid=1358, Unknown=0, NotChecked=0, Total=1892 [2021-01-06 22:59:27,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-01-06 22:59:27,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 93. [2021-01-06 22:59:27,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 22:59:27,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2021-01-06 22:59:27,083 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2021-01-06 22:59:27,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:27,083 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2021-01-06 22:59:27,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 22:59:27,084 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2021-01-06 22:59:27,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:27,084 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:27,084 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:27,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:27,285 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:27,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:27,285 INFO L82 PathProgramCache]: Analyzing trace with hash -213031394, now seen corresponding path program 102 times [2021-01-06 22:59:27,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:27,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452887556] [2021-01-06 22:59:27,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:27,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:27,536 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:27,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452887556] [2021-01-06 22:59:27,536 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700897884] [2021-01-06 22:59:27,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:27,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 22:59:27,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:27,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:27,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:27,652 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:27,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:27,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 22:59:27,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322284149] [2021-01-06 22:59:27,653 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 22:59:27,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:27,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 22:59:27,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:59:27,654 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2021-01-06 22:59:28,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:28,253 INFO L93 Difference]: Finished difference Result 150 states and 347 transitions. [2021-01-06 22:59:28,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-01-06 22:59:28,254 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2021-01-06 22:59:28,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:28,255 INFO L225 Difference]: With dead ends: 150 [2021-01-06 22:59:28,255 INFO L226 Difference]: Without dead ends: 144 [2021-01-06 22:59:28,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2021-01-06 22:59:28,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-01-06 22:59:28,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 93. [2021-01-06 22:59:28,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 22:59:28,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2021-01-06 22:59:28,258 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2021-01-06 22:59:28,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:28,258 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2021-01-06 22:59:28,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 22:59:28,258 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2021-01-06 22:59:28,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:28,258 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:28,258 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:28,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-01-06 22:59:28,459 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:28,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:28,460 INFO L82 PathProgramCache]: Analyzing trace with hash -788411242, now seen corresponding path program 103 times [2021-01-06 22:59:28,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:28,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77899053] [2021-01-06 22:59:28,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:28,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:28,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77899053] [2021-01-06 22:59:28,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760937001] [2021-01-06 22:59:28,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:28,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:28,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:28,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:28,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 22:59:28,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368480166] [2021-01-06 22:59:28,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 22:59:28,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:28,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 22:59:28,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:59:28,824 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2021-01-06 22:59:29,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:29,482 INFO L93 Difference]: Finished difference Result 146 states and 339 transitions. [2021-01-06 22:59:29,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-01-06 22:59:29,482 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2021-01-06 22:59:29,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:29,483 INFO L225 Difference]: With dead ends: 146 [2021-01-06 22:59:29,483 INFO L226 Difference]: Without dead ends: 140 [2021-01-06 22:59:29,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=594, Invalid=1662, Unknown=0, NotChecked=0, Total=2256 [2021-01-06 22:59:29,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-01-06 22:59:29,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 93. [2021-01-06 22:59:29,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 22:59:29,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2021-01-06 22:59:29,487 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2021-01-06 22:59:29,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:29,487 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2021-01-06 22:59:29,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 22:59:29,487 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2021-01-06 22:59:29,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:29,488 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:29,488 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:29,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:29,688 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:29,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:29,689 INFO L82 PathProgramCache]: Analyzing trace with hash 51212558, now seen corresponding path program 104 times [2021-01-06 22:59:29,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:29,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088640326] [2021-01-06 22:59:29,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:29,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088640326] [2021-01-06 22:59:29,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547004749] [2021-01-06 22:59:29,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:29,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:59:29,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:29,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:29,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:30,006 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:30,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:30,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 22:59:30,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309121427] [2021-01-06 22:59:30,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 22:59:30,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:30,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 22:59:30,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:59:30,008 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2021-01-06 22:59:30,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:30,730 INFO L93 Difference]: Finished difference Result 142 states and 331 transitions. [2021-01-06 22:59:30,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-01-06 22:59:30,731 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2021-01-06 22:59:30,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:30,731 INFO L225 Difference]: With dead ends: 142 [2021-01-06 22:59:30,732 INFO L226 Difference]: Without dead ends: 136 [2021-01-06 22:59:30,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=648, Invalid=1802, Unknown=0, NotChecked=0, Total=2450 [2021-01-06 22:59:30,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-01-06 22:59:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 93. [2021-01-06 22:59:30,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 22:59:30,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2021-01-06 22:59:30,735 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2021-01-06 22:59:30,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:30,735 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2021-01-06 22:59:30,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 22:59:30,735 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2021-01-06 22:59:30,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:30,736 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:30,736 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:30,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-01-06 22:59:30,948 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:30,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:30,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1842883706, now seen corresponding path program 105 times [2021-01-06 22:59:30,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:30,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123382762] [2021-01-06 22:59:30,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:31,180 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:31,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123382762] [2021-01-06 22:59:31,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058365879] [2021-01-06 22:59:31,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:31,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 22:59:31,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:31,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:31,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:31,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:31,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 22:59:31,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210576183] [2021-01-06 22:59:31,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 22:59:31,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:31,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 22:59:31,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:59:31,295 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2021-01-06 22:59:32,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:32,077 INFO L93 Difference]: Finished difference Result 138 states and 323 transitions. [2021-01-06 22:59:32,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-01-06 22:59:32,078 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2021-01-06 22:59:32,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:32,081 INFO L225 Difference]: With dead ends: 138 [2021-01-06 22:59:32,081 INFO L226 Difference]: Without dead ends: 132 [2021-01-06 22:59:32,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=718, Invalid=1934, Unknown=0, NotChecked=0, Total=2652 [2021-01-06 22:59:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-01-06 22:59:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2021-01-06 22:59:32,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 22:59:32,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2021-01-06 22:59:32,084 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2021-01-06 22:59:32,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:32,084 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2021-01-06 22:59:32,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 22:59:32,084 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2021-01-06 22:59:32,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:32,085 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:32,085 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:32,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:32,299 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:32,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:32,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1323856894, now seen corresponding path program 106 times [2021-01-06 22:59:32,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:32,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467643282] [2021-01-06 22:59:32,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:32,529 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:32,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467643282] [2021-01-06 22:59:32,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716776129] [2021-01-06 22:59:32,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:32,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:59:32,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:32,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:32,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:32,634 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:32,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:32,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 22:59:32,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185628288] [2021-01-06 22:59:32,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 22:59:32,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:32,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 22:59:32,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:59:32,635 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2021-01-06 22:59:33,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:33,471 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2021-01-06 22:59:33,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-01-06 22:59:33,472 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2021-01-06 22:59:33,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:33,473 INFO L225 Difference]: With dead ends: 134 [2021-01-06 22:59:33,473 INFO L226 Difference]: Without dead ends: 128 [2021-01-06 22:59:33,474 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=2058, Unknown=0, NotChecked=0, Total=2862 [2021-01-06 22:59:33,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-01-06 22:59:33,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2021-01-06 22:59:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 22:59:33,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2021-01-06 22:59:33,477 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2021-01-06 22:59:33,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:33,477 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2021-01-06 22:59:33,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 22:59:33,477 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2021-01-06 22:59:33,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:33,477 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:33,478 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:33,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:33,691 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:33,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:33,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1237766774, now seen corresponding path program 107 times [2021-01-06 22:59:33,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:33,692 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866654347] [2021-01-06 22:59:33,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:33,916 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:33,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866654347] [2021-01-06 22:59:33,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40144415] [2021-01-06 22:59:33,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:33,974 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-01-06 22:59:33,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:33,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:33,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:34,029 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:34,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:34,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-01-06 22:59:34,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828815056] [2021-01-06 22:59:34,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 22:59:34,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:34,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 22:59:34,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:59:34,030 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2021-01-06 22:59:34,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:34,975 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2021-01-06 22:59:34,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-01-06 22:59:34,976 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2021-01-06 22:59:34,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:34,977 INFO L225 Difference]: With dead ends: 128 [2021-01-06 22:59:34,977 INFO L226 Difference]: Without dead ends: 122 [2021-01-06 22:59:34,978 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=906, Invalid=2174, Unknown=0, NotChecked=0, Total=3080 [2021-01-06 22:59:34,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-01-06 22:59:34,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2021-01-06 22:59:34,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2021-01-06 22:59:34,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2021-01-06 22:59:34,982 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2021-01-06 22:59:34,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:34,982 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2021-01-06 22:59:34,982 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 22:59:34,982 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2021-01-06 22:59:34,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:34,983 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:34,983 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:35,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-01-06 22:59:35,197 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:35,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:35,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1260049698, now seen corresponding path program 108 times [2021-01-06 22:59:35,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:35,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661958438] [2021-01-06 22:59:35,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:35,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:35,377 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:35,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661958438] [2021-01-06 22:59:35,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398880868] [2021-01-06 22:59:35,378 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:35,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-01-06 22:59:35,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:35,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2021-01-06 22:59:35,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:35,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:35,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2021-01-06 22:59:35,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56436199] [2021-01-06 22:59:35,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-01-06 22:59:35,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:35,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-01-06 22:59:35,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2021-01-06 22:59:35,589 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2021-01-06 22:59:36,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:36,746 INFO L93 Difference]: Finished difference Result 144 states and 345 transitions. [2021-01-06 22:59:36,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-01-06 22:59:36,747 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2021-01-06 22:59:36,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:36,748 INFO L225 Difference]: With dead ends: 144 [2021-01-06 22:59:36,748 INFO L226 Difference]: Without dead ends: 133 [2021-01-06 22:59:36,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=958, Invalid=2464, Unknown=0, NotChecked=0, Total=3422 [2021-01-06 22:59:36,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-01-06 22:59:36,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 78. [2021-01-06 22:59:36,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2021-01-06 22:59:36,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 190 transitions. [2021-01-06 22:59:36,751 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 190 transitions. Word has length 26 [2021-01-06 22:59:36,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:36,751 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 190 transitions. [2021-01-06 22:59:36,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2021-01-06 22:59:36,752 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 190 transitions. [2021-01-06 22:59:36,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:36,752 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:36,752 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:36,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:36,953 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:36,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:36,953 INFO L82 PathProgramCache]: Analyzing trace with hash 159167202, now seen corresponding path program 109 times [2021-01-06 22:59:36,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:36,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124140764] [2021-01-06 22:59:36,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:36,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:37,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124140764] [2021-01-06 22:59:37,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1012538768] [2021-01-06 22:59:37,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:37,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2021-01-06 22:59:37,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:37,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:37,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-01-06 22:59:37,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92063939] [2021-01-06 22:59:37,271 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:37,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:37,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:37,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:37,271 INFO L87 Difference]: Start difference. First operand 78 states and 190 transitions. Second operand 22 states. [2021-01-06 22:59:38,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:38,185 INFO L93 Difference]: Finished difference Result 169 states and 397 transitions. [2021-01-06 22:59:38,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 22:59:38,186 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2021-01-06 22:59:38,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:38,187 INFO L225 Difference]: With dead ends: 169 [2021-01-06 22:59:38,187 INFO L226 Difference]: Without dead ends: 161 [2021-01-06 22:59:38,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1007, Invalid=2185, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 22:59:38,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-01-06 22:59:38,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 99. [2021-01-06 22:59:38,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 22:59:38,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 255 transitions. [2021-01-06 22:59:38,191 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 255 transitions. Word has length 26 [2021-01-06 22:59:38,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:38,191 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 255 transitions. [2021-01-06 22:59:38,191 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:38,191 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 255 transitions. [2021-01-06 22:59:38,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-01-06 22:59:38,191 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:38,192 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:38,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:38,392 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:38,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:38,393 INFO L82 PathProgramCache]: Analyzing trace with hash 159885286, now seen corresponding path program 110 times [2021-01-06 22:59:38,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:38,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576835113] [2021-01-06 22:59:38,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:38,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:38,634 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:38,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576835113] [2021-01-06 22:59:38,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337726717] [2021-01-06 22:59:38,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:38,695 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-01-06 22:59:38,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:38,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2021-01-06 22:59:38,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:38,748 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:59:38,767 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:38,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:38,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2021-01-06 22:59:38,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018576444] [2021-01-06 22:59:38,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-01-06 22:59:38,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:38,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-01-06 22:59:38,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2021-01-06 22:59:38,770 INFO L87 Difference]: Start difference. First operand 99 states and 255 transitions. Second operand 24 states. [2021-01-06 22:59:39,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:39,981 INFO L93 Difference]: Finished difference Result 169 states and 399 transitions. [2021-01-06 22:59:39,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 22:59:39,981 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2021-01-06 22:59:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:39,982 INFO L225 Difference]: With dead ends: 169 [2021-01-06 22:59:39,982 INFO L226 Difference]: Without dead ends: 151 [2021-01-06 22:59:39,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1197, Invalid=2585, Unknown=0, NotChecked=0, Total=3782 [2021-01-06 22:59:39,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-01-06 22:59:39,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 108. [2021-01-06 22:59:39,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2021-01-06 22:59:39,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 265 transitions. [2021-01-06 22:59:39,985 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 265 transitions. Word has length 26 [2021-01-06 22:59:39,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:39,985 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 265 transitions. [2021-01-06 22:59:39,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2021-01-06 22:59:39,985 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 265 transitions. [2021-01-06 22:59:39,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 22:59:39,986 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:39,986 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:40,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-01-06 22:59:40,187 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:40,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:40,187 INFO L82 PathProgramCache]: Analyzing trace with hash 406024247, now seen corresponding path program 111 times [2021-01-06 22:59:40,188 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:40,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504664228] [2021-01-06 22:59:40,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:40,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:40,396 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:40,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504664228] [2021-01-06 22:59:40,397 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14022334] [2021-01-06 22:59:40,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:40,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-01-06 22:59:40,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:40,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 22:59:40,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:40,506 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-01-06 22:59:40,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:40,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-01-06 22:59:40,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055424974] [2021-01-06 22:59:40,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-01-06 22:59:40,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:40,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-01-06 22:59:40,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2021-01-06 22:59:40,508 INFO L87 Difference]: Start difference. First operand 108 states and 265 transitions. Second operand 22 states. [2021-01-06 22:59:41,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:41,492 INFO L93 Difference]: Finished difference Result 172 states and 405 transitions. [2021-01-06 22:59:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-01-06 22:59:41,492 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2021-01-06 22:59:41,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:41,493 INFO L225 Difference]: With dead ends: 172 [2021-01-06 22:59:41,493 INFO L226 Difference]: Without dead ends: 164 [2021-01-06 22:59:41,494 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2021-01-06 22:59:41,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-01-06 22:59:41,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 115. [2021-01-06 22:59:41,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2021-01-06 22:59:41,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 289 transitions. [2021-01-06 22:59:41,497 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 289 transitions. Word has length 27 [2021-01-06 22:59:41,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:41,497 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 289 transitions. [2021-01-06 22:59:41,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2021-01-06 22:59:41,497 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 289 transitions. [2021-01-06 22:59:41,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-01-06 22:59:41,497 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:41,497 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:41,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-01-06 22:59:41,698 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:41,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:41,699 INFO L82 PathProgramCache]: Analyzing trace with hash 406742331, now seen corresponding path program 112 times [2021-01-06 22:59:41,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:41,699 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979173951] [2021-01-06 22:59:41,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:41,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:41,949 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:41,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979173951] [2021-01-06 22:59:41,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402717335] [2021-01-06 22:59:41,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:42,008 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-01-06 22:59:42,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:42,009 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2021-01-06 22:59:42,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:42,058 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2021-01-06 22:59:42,081 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:42,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:42,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2021-01-06 22:59:42,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409265593] [2021-01-06 22:59:42,082 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-01-06 22:59:42,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:42,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-01-06 22:59:42,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-01-06 22:59:42,083 INFO L87 Difference]: Start difference. First operand 115 states and 289 transitions. Second operand 25 states. [2021-01-06 22:59:43,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:43,414 INFO L93 Difference]: Finished difference Result 167 states and 396 transitions. [2021-01-06 22:59:43,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-01-06 22:59:43,415 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2021-01-06 22:59:43,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:43,416 INFO L225 Difference]: With dead ends: 167 [2021-01-06 22:59:43,416 INFO L226 Difference]: Without dead ends: 149 [2021-01-06 22:59:43,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1215, Invalid=2691, Unknown=0, NotChecked=0, Total=3906 [2021-01-06 22:59:43,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-01-06 22:59:43,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 99. [2021-01-06 22:59:43,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2021-01-06 22:59:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 234 transitions. [2021-01-06 22:59:43,420 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 234 transitions. Word has length 27 [2021-01-06 22:59:43,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:43,420 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 234 transitions. [2021-01-06 22:59:43,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2021-01-06 22:59:43,420 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 234 transitions. [2021-01-06 22:59:43,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 22:59:43,420 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:43,420 INFO L422 BasicCegarLoop]: trace histogram [11, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:43,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-01-06 22:59:43,621 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:43,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:43,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1305995578, now seen corresponding path program 113 times [2021-01-06 22:59:43,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:43,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912345776] [2021-01-06 22:59:43,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:43,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:43,723 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 81 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:43,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912345776] [2021-01-06 22:59:43,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164073083] [2021-01-06 22:59:43,724 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:43,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-01-06 22:59:43,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:43,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:59:43,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:43,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 22:59:43,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2021-01-06 22:59:43,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223018092] [2021-01-06 22:59:43,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:59:43,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:43,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:59:43,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:59:43,824 INFO L87 Difference]: Start difference. First operand 99 states and 234 transitions. Second operand 13 states. [2021-01-06 22:59:43,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:43,849 INFO L93 Difference]: Finished difference Result 416 states and 914 transitions. [2021-01-06 22:59:43,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:59:43,850 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2021-01-06 22:59:43,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:43,850 INFO L225 Difference]: With dead ends: 416 [2021-01-06 22:59:43,850 INFO L226 Difference]: Without dead ends: 49 [2021-01-06 22:59:43,850 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:59:43,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-01-06 22:59:43,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-01-06 22:59:43,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2021-01-06 22:59:43,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 75 transitions. [2021-01-06 22:59:43,851 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 75 transitions. Word has length 28 [2021-01-06 22:59:43,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:43,851 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 75 transitions. [2021-01-06 22:59:43,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:59:43,852 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 75 transitions. [2021-01-06 22:59:43,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-01-06 22:59:43,852 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:43,852 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:44,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:44,053 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:44,053 INFO L82 PathProgramCache]: Analyzing trace with hash -968333302, now seen corresponding path program 114 times [2021-01-06 22:59:44,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:44,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924807649] [2021-01-06 22:59:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:44,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:44,323 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:44,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924807649] [2021-01-06 22:59:44,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222493602] [2021-01-06 22:59:44,323 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:44,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-01-06 22:59:44,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-01-06 22:59:44,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjunts are in the unsatisfiable core [2021-01-06 22:59:44,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:44,472 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:44,472 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-01-06 22:59:44,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2021-01-06 22:59:44,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340543295] [2021-01-06 22:59:44,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-01-06 22:59:44,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:44,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-01-06 22:59:44,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2021-01-06 22:59:44,474 INFO L87 Difference]: Start difference. First operand 43 states and 75 transitions. Second operand 26 states. [2021-01-06 22:59:45,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:45,054 INFO L93 Difference]: Finished difference Result 75 states and 129 transitions. [2021-01-06 22:59:45,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-01-06 22:59:45,054 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2021-01-06 22:59:45,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:45,055 INFO L225 Difference]: With dead ends: 75 [2021-01-06 22:59:45,055 INFO L226 Difference]: Without dead ends: 46 [2021-01-06 22:59:45,056 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=583, Invalid=1579, Unknown=0, NotChecked=0, Total=2162 [2021-01-06 22:59:45,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-01-06 22:59:45,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-01-06 22:59:45,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2021-01-06 22:59:45,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 80 transitions. [2021-01-06 22:59:45,057 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 80 transitions. Word has length 28 [2021-01-06 22:59:45,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:45,057 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 80 transitions. [2021-01-06 22:59:45,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2021-01-06 22:59:45,058 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 80 transitions. [2021-01-06 22:59:45,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-01-06 22:59:45,058 INFO L414 BasicCegarLoop]: Found error trace [2021-01-06 22:59:45,058 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2021-01-06 22:59:45,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-01-06 22:59:45,259 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-01-06 22:59:45,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-01-06 22:59:45,260 INFO L82 PathProgramCache]: Analyzing trace with hash 38085663, now seen corresponding path program 115 times [2021-01-06 22:59:45,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-01-06 22:59:45,260 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770735181] [2021-01-06 22:59:45,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-01-06 22:59:45,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:45,356 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:45,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770735181] [2021-01-06 22:59:45,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672789586] [2021-01-06 22:59:45,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-01-06 22:59:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-01-06 22:59:45,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2021-01-06 22:59:45,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-01-06 22:59:45,474 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-01-06 22:59:45,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-01-06 22:59:45,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2021-01-06 22:59:45,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845317562] [2021-01-06 22:59:45,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-01-06 22:59:45,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-01-06 22:59:45,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-01-06 22:59:45,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:59:45,475 INFO L87 Difference]: Start difference. First operand 46 states and 80 transitions. Second operand 13 states. [2021-01-06 22:59:45,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-01-06 22:59:45,502 INFO L93 Difference]: Finished difference Result 151 states and 219 transitions. [2021-01-06 22:59:45,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-01-06 22:59:45,503 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2021-01-06 22:59:45,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-01-06 22:59:45,503 INFO L225 Difference]: With dead ends: 151 [2021-01-06 22:59:45,503 INFO L226 Difference]: Without dead ends: 0 [2021-01-06 22:59:45,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2021-01-06 22:59:45,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-01-06 22:59:45,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-01-06 22:59:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2021-01-06 22:59:45,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-01-06 22:59:45,504 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2021-01-06 22:59:45,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-01-06 22:59:45,505 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-01-06 22:59:45,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2021-01-06 22:59:45,505 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-01-06 22:59:45,505 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-01-06 22:59:45,720 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-01-06 22:59:45,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.01 10:59:45 BasicIcfg [2021-01-06 22:59:45,725 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-01-06 22:59:45,725 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-01-06 22:59:45,725 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-01-06 22:59:45,726 INFO L275 PluginConnector]: Witness Printer initialized [2021-01-06 22:59:45,726 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.01 10:57:55" (3/4) ... [2021-01-06 22:59:45,730 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-01-06 22:59:45,736 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2021-01-06 22:59:45,736 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2021-01-06 22:59:45,740 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2021-01-06 22:59:45,741 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-01-06 22:59:45,741 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-01-06 22:59:45,741 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-01-06 22:59:45,773 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/pthread/triangular-longer-1.i-witness.graphml [2021-01-06 22:59:45,773 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-01-06 22:59:45,774 INFO L168 Benchmark]: Toolchain (without parser) took 111843.63 ms. Allocated memory was 154.1 MB in the beginning and 325.1 MB in the end (delta: 170.9 MB). Free memory was 127.8 MB in the beginning and 285.3 MB in the end (delta: -157.5 MB). Peak memory consumption was 14.6 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:45,774 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 154.1 MB. Free memory is still 128.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 22:59:45,775 INFO L168 Benchmark]: CACSL2BoogieTranslator took 655.20 ms. Allocated memory is still 154.1 MB. Free memory was 127.6 MB in the beginning and 135.3 MB in the end (delta: -7.6 MB). Peak memory consumption was 31.9 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:45,775 INFO L168 Benchmark]: Boogie Procedure Inliner took 54.36 ms. Allocated memory is still 154.1 MB. Free memory was 135.3 MB in the beginning and 133.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:45,776 INFO L168 Benchmark]: Boogie Preprocessor took 32.89 ms. Allocated memory is still 154.1 MB. Free memory was 133.6 MB in the beginning and 132.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:45,776 INFO L168 Benchmark]: RCFGBuilder took 559.35 ms. Allocated memory is still 154.1 MB. Free memory was 132.1 MB in the beginning and 111.7 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:45,776 INFO L168 Benchmark]: TraceAbstraction took 110482.43 ms. Allocated memory was 154.1 MB in the beginning and 325.1 MB in the end (delta: 170.9 MB). Free memory was 111.1 MB in the beginning and 287.9 MB in the end (delta: -176.8 MB). There was no memory consumed. Max. memory is 8.0 GB. [2021-01-06 22:59:45,777 INFO L168 Benchmark]: Witness Printer took 47.73 ms. Allocated memory is still 325.1 MB. Free memory was 287.9 MB in the beginning and 285.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2021-01-06 22:59:45,779 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 154.1 MB. Free memory is still 128.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 655.20 ms. Allocated memory is still 154.1 MB. Free memory was 127.6 MB in the beginning and 135.3 MB in the end (delta: -7.6 MB). Peak memory consumption was 31.9 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 54.36 ms. Allocated memory is still 154.1 MB. Free memory was 135.3 MB in the beginning and 133.6 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 32.89 ms. Allocated memory is still 154.1 MB. Free memory was 133.6 MB in the beginning and 132.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 559.35 ms. Allocated memory is still 154.1 MB. Free memory was 132.1 MB in the beginning and 111.7 MB in the end (delta: 20.4 MB). Peak memory consumption was 21.0 MB. Max. memory is 8.0 GB. * TraceAbstraction took 110482.43 ms. Allocated memory was 154.1 MB in the beginning and 325.1 MB in the end (delta: 170.9 MB). Free memory was 111.1 MB in the beginning and 287.9 MB in the end (delta: -176.8 MB). There was no memory consumed. Max. memory is 8.0 GB. * Witness Printer took 47.73 ms. Allocated memory is still 325.1 MB. Free memory was 287.9 MB in the beginning and 285.3 MB in the end (delta: 2.6 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 645 VarBasedMoverChecksPositive, 20 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 20 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.2s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.6s, 62 PlacesBefore, 20 PlacesAfterwards, 60 TransitionsBefore, 16 TransitionsAfterwards, 968 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 52 TotalNumberOfCompositions, 998 MoverChecksTotal - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 110.2s, OverallIterations: 118, TraceHistogramMax: 11, AutomataDifference: 52.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 1771 SDtfs, 6303 SDslu, 10215 SDs, 0 SdLazy, 11420 SolverSat, 7040 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5985 GetRequests, 2088 SyntacticMatches, 0 SemanticMatches, 3897 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35672 ImplicationChecksByTransitivity, 50.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=114, 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, 118 MinimizatonAttempts, 3547 StatesRemovedByMinimization, 115 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 20.5s InterpolantComputationTime, 4618 NumberOfCodeBlocks, 4618 NumberOfCodeBlocksAsserted, 568 NumberOfCheckSat, 4388 ConstructedInterpolants, 0 QuantifiedInterpolants, 391868 SizeOfPredicates, 1359 NumberOfNonLiveVariables, 15895 ConjunctsInSsa, 2062 ConjunctsInUnsatCore, 230 InterpolantComputations, 8 PerfectInterpolantSequences, 376/8420 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 proved your program to be correct! Received shutdown request...