/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/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:27:58,104 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:27:58,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:27:58,143 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:27:58,143 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:27:58,145 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:27:58,147 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:27:58,149 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:27:58,151 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:27:58,153 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:27:58,154 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:27:58,156 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:27:58,156 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:27:58,158 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:27:58,159 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:27:58,161 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:27:58,162 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:27:58,163 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:27:58,165 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:27:58,168 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:27:58,170 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:27:58,171 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:27:58,173 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:27:58,197 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:27:58,200 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 10:27:58,200 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 10:27:58,201 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 10:27:58,202 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 10:27:58,202 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 10:27:58,203 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 10:27:58,203 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:27:58,204 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:27:58,205 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:27:58,206 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:27:58,207 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:27:58,207 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:27:58,208 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:27:58,208 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:27:58,209 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:27:58,210 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:27:58,210 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:27:58,211 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:27:58,241 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:27:58,242 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:27:58,243 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:27:58,243 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:27:58,244 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:27:58,244 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:27:58,244 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:27:58,244 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:27:58,244 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:27:58,245 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:27:58,245 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:27:58,245 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:27:58,245 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:27:58,245 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:27:58,246 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:27:58,246 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:27:58,246 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:27:58,246 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:27:58,246 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:27:58,247 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:27:58,247 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:27:58,247 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:27:58,247 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:27:58,247 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:27:58,248 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:27:58,248 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/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:27:58,636 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:27:58,667 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:27:58,670 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:27:58,671 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:27:58,672 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:27:58,673 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_bench_longest-1.i [2020-12-22 10:27:58,765 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfa188d5/036191907a6945ffb90450b5a4c04b06/FLAGf86a3cebe [2020-12-22 10:27:59,491 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:27:59,492 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-1.i [2020-12-22 10:27:59,519 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfa188d5/036191907a6945ffb90450b5a4c04b06/FLAGf86a3cebe [2020-12-22 10:27:59,725 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7cfa188d5/036191907a6945ffb90450b5a4c04b06 [2020-12-22 10:27:59,729 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:27:59,731 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:27:59,744 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:27:59,744 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:27:59,749 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:27:59,750 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:27:59" (1/1) ... [2020-12-22 10:27:59,752 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2bc1d872 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:27:59, skipping insertion in model container [2020-12-22 10:27:59,753 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:27:59" (1/1) ... [2020-12-22 10:27:59,762 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:27:59,815 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:28:00,203 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-1.i[30286,30299] [2020-12-22 10:28:00,222 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-1.i[31038,31051] [2020-12-22 10:28:00,223 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:28:00,235 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:28:00,277 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-1.i[30286,30299] [2020-12-22 10:28:00,284 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-1.i[31038,31051] [2020-12-22 10:28:00,285 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:28:00,405 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:28:00,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:00 WrapperNode [2020-12-22 10:28:00,406 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:28:00,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:28:00,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:28:00,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:28:00,420 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:00" (1/1) ... [2020-12-22 10:28:00,438 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:00" (1/1) ... [2020-12-22 10:28:00,465 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:28:00,466 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:28:00,466 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:28:00,466 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:28:00,477 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:00" (1/1) ... [2020-12-22 10:28:00,477 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:00" (1/1) ... [2020-12-22 10:28:00,481 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:00" (1/1) ... [2020-12-22 10:28:00,481 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:00" (1/1) ... [2020-12-22 10:28:00,487 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:00" (1/1) ... [2020-12-22 10:28:00,492 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:00" (1/1) ... [2020-12-22 10:28:00,494 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:00" (1/1) ... [2020-12-22 10:28:00,497 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:28:00,498 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:28:00,498 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:28:00,498 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:28:00,500 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:00" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:28:00,625 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-22 10:28:00,625 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-22 10:28:00,626 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-22 10:28:00,626 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-22 10:28:00,627 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 10:28:00,628 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-22 10:28:00,628 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:28:00,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 10:28:00,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:28:00,630 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-22 10:28:00,631 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:28:00,632 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:28:00,634 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-22 10:28:01,182 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:28:01,183 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-22 10:28:01,185 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:28:01 BoogieIcfgContainer [2020-12-22 10:28:01,185 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:28:01,187 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:28:01,187 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:28:01,191 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:28:01,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:27:59" (1/3) ... [2020-12-22 10:28:01,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0ab8a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:28:01, skipping insertion in model container [2020-12-22 10:28:01,193 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:28:00" (2/3) ... [2020-12-22 10:28:01,193 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d0ab8a8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:28:01, skipping insertion in model container [2020-12-22 10:28:01,194 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:28:01" (3/3) ... [2020-12-22 10:28:01,195 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-12-22 10:28:01,203 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-22 10:28:01,203 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:28:01,209 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 10:28:01,210 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-22 10:28:01,248 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,249 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,249 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,249 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,249 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,250 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,250 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,250 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,250 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,251 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,251 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,251 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,252 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,252 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,252 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,252 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,253 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,253 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,253 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,253 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,254 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,254 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,254 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,255 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,255 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,255 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,255 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,256 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,256 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,256 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,257 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,257 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,257 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,257 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,258 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,258 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,258 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,258 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,259 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,259 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,259 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,259 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,260 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,260 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,260 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,261 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,261 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,261 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,261 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,261 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,262 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,262 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,262 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,262 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,263 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,263 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,263 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,263 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,264 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,264 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,266 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,267 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,267 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,267 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,268 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,268 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,274 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,274 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,274 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,275 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,275 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,275 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:28:01,278 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-22 10:28:01,298 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 10:28:01,322 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:28:01,322 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:28:01,323 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:28:01,323 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:28:01,323 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:28:01,323 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:28:01,323 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:28:01,324 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:28:01,336 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-22 10:28:01,339 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 62 transitions, 134 flow [2020-12-22 10:28:01,342 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 62 transitions, 134 flow [2020-12-22 10:28:01,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 64 places, 62 transitions, 134 flow [2020-12-22 10:28:01,390 INFO L129 PetriNetUnfolder]: 5/60 cut-off events. [2020-12-22 10:28:01,390 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-22 10:28:01,399 INFO L84 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 60 events. 5/60 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 89 event pairs, 0 based on Foata normal form. 0/54 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2020-12-22 10:28:01,405 INFO L116 LiptonReduction]: Number of co-enabled transitions 1080 [2020-12-22 10:28:03,910 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:28:04,110 WARN L197 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-22 10:28:04,666 WARN L197 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-12-22 10:28:04,799 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 10:28:05,110 WARN L197 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-12-22 10:28:05,239 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-22 10:28:05,243 INFO L131 LiptonReduction]: Checked pairs total: 1148 [2020-12-22 10:28:05,243 INFO L133 LiptonReduction]: Total number of compositions: 55 [2020-12-22 10:28:05,250 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-12-22 10:28:05,262 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-12-22 10:28:05,264 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-22 10:28:05,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 10:28:05,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:05,272 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 10:28:05,272 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:05,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:05,279 INFO L82 PathProgramCache]: Analyzing trace with hash -1040753464, now seen corresponding path program 1 times [2020-12-22 10:28:05,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:05,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272260979] [2020-12-22 10:28:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:05,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:05,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272260979] [2020-12-22 10:28:05,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:05,621 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:28:05,621 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353785606] [2020-12-22 10:28:05,628 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:28:05,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:05,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:28:05,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:28:05,649 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-12-22 10:28:05,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:05,728 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-12-22 10:28:05,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:28:05,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 10:28:05,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:05,742 INFO L225 Difference]: With dead ends: 83 [2020-12-22 10:28:05,743 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 10:28:05,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:28:05,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 10:28:05,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-12-22 10:28:05,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 10:28:05,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-12-22 10:28:05,790 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-12-22 10:28:05,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:05,791 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-12-22 10:28:05,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:28:05,791 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-12-22 10:28:05,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 10:28:05,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:05,793 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:05,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:28:05,793 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:05,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:05,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1204102091, now seen corresponding path program 1 times [2020-12-22 10:28:05,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:05,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752901922] [2020-12-22 10:28:05,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:05,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:05,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:05,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752901922] [2020-12-22 10:28:05,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:05,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:28:05,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573759595] [2020-12-22 10:28:05,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:28:05,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:05,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:28:05,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:28:05,963 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-12-22 10:28:06,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:06,067 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-12-22 10:28:06,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:28:06,068 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 10:28:06,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:06,074 INFO L225 Difference]: With dead ends: 80 [2020-12-22 10:28:06,075 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 10:28:06,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:28:06,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 10:28:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-12-22 10:28:06,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 10:28:06,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-12-22 10:28:06,102 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-12-22 10:28:06,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:06,105 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-12-22 10:28:06,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:28:06,105 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-12-22 10:28:06,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 10:28:06,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:06,107 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:06,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:28:06,107 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:06,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:06,108 INFO L82 PathProgramCache]: Analyzing trace with hash 563301308, now seen corresponding path program 1 times [2020-12-22 10:28:06,109 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:06,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921727670] [2020-12-22 10:28:06,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:06,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:06,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921727670] [2020-12-22 10:28:06,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:06,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:28:06,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338606332] [2020-12-22 10:28:06,243 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:28:06,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:06,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:28:06,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:28:06,248 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-12-22 10:28:06,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:06,291 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-12-22 10:28:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:28:06,292 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 10:28:06,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:06,294 INFO L225 Difference]: With dead ends: 73 [2020-12-22 10:28:06,295 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 10:28:06,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:28:06,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 10:28:06,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-12-22 10:28:06,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 10:28:06,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-12-22 10:28:06,316 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-12-22 10:28:06,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:06,316 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-12-22 10:28:06,317 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:28:06,317 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-12-22 10:28:06,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 10:28:06,319 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:06,319 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:06,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:28:06,319 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:06,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:06,321 INFO L82 PathProgramCache]: Analyzing trace with hash 563669588, now seen corresponding path program 2 times [2020-12-22 10:28:06,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:06,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544581794] [2020-12-22 10:28:06,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:06,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:06,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:06,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544581794] [2020-12-22 10:28:06,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:06,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:28:06,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335605832] [2020-12-22 10:28:06,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:28:06,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:06,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:28:06,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:28:06,455 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-12-22 10:28:06,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:06,535 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-12-22 10:28:06,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:28:06,536 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 10:28:06,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:06,537 INFO L225 Difference]: With dead ends: 86 [2020-12-22 10:28:06,538 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 10:28:06,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:28:06,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 10:28:06,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-12-22 10:28:06,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 10:28:06,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-12-22 10:28:06,546 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-12-22 10:28:06,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:06,546 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-12-22 10:28:06,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:28:06,546 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-12-22 10:28:06,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 10:28:06,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:06,547 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:06,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:28:06,548 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:06,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1304831828, now seen corresponding path program 2 times [2020-12-22 10:28:06,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:06,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432001817] [2020-12-22 10:28:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:06,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:06,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432001817] [2020-12-22 10:28:06,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860539876] [2020-12-22 10:28:06,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:06,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:06,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:06,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:28:06,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:06,872 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:06,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:06,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-12-22 10:28:06,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367610024] [2020-12-22 10:28:06,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:28:06,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:06,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:28:06,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:28:06,909 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-12-22 10:28:07,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:07,091 INFO L93 Difference]: Finished difference Result 121 states and 281 transitions. [2020-12-22 10:28:07,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:28:07,091 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-12-22 10:28:07,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:07,093 INFO L225 Difference]: With dead ends: 121 [2020-12-22 10:28:07,093 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 10:28:07,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:28:07,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 10:28:07,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 76. [2020-12-22 10:28:07,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 10:28:07,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-12-22 10:28:07,101 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 9 [2020-12-22 10:28:07,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:07,101 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-12-22 10:28:07,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:28:07,102 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-12-22 10:28:07,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 10:28:07,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:07,103 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:07,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:07,319 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:07,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:07,321 INFO L82 PathProgramCache]: Analyzing trace with hash 282471732, now seen corresponding path program 3 times [2020-12-22 10:28:07,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:07,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630624508] [2020-12-22 10:28:07,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:07,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:07,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:07,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630624508] [2020-12-22 10:28:07,437 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859365297] [2020-12-22 10:28:07,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:07,518 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:28:07,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:07,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:28:07,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:07,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:07,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:07,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-22 10:28:07,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169851489] [2020-12-22 10:28:07,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:28:07,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:07,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:28:07,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:28:07,615 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 9 states. [2020-12-22 10:28:07,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:07,677 INFO L93 Difference]: Finished difference Result 89 states and 215 transitions. [2020-12-22 10:28:07,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:28:07,678 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-22 10:28:07,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:07,679 INFO L225 Difference]: With dead ends: 89 [2020-12-22 10:28:07,684 INFO L226 Difference]: Without dead ends: 86 [2020-12-22 10:28:07,684 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:28:07,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-22 10:28:07,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2020-12-22 10:28:07,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 10:28:07,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-12-22 10:28:07,710 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 9 [2020-12-22 10:28:07,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:07,710 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-12-22 10:28:07,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:28:07,711 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-12-22 10:28:07,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 10:28:07,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:07,713 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:07,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:07,925 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:07,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:07,926 INFO L82 PathProgramCache]: Analyzing trace with hash 293888412, now seen corresponding path program 4 times [2020-12-22 10:28:07,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:07,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310826368] [2020-12-22 10:28:07,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:07,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:07,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310826368] [2020-12-22 10:28:07,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977603269] [2020-12-22 10:28:07,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:08,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:08,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:08,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:28:08,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:08,142 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:08,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:08,143 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-22 10:28:08,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227935538] [2020-12-22 10:28:08,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:28:08,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:08,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:28:08,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:28:08,145 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 9 states. [2020-12-22 10:28:08,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:08,212 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-12-22 10:28:08,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:28:08,213 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-22 10:28:08,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:08,215 INFO L225 Difference]: With dead ends: 95 [2020-12-22 10:28:08,216 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 10:28:08,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:28:08,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 10:28:08,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-12-22 10:28:08,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 10:28:08,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 202 transitions. [2020-12-22 10:28:08,235 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 202 transitions. Word has length 9 [2020-12-22 10:28:08,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:08,236 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 202 transitions. [2020-12-22 10:28:08,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:28:08,236 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 202 transitions. [2020-12-22 10:28:08,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-22 10:28:08,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:08,240 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:08,453 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:08,454 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:08,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:08,455 INFO L82 PathProgramCache]: Analyzing trace with hash 293910732, now seen corresponding path program 5 times [2020-12-22 10:28:08,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:08,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588187987] [2020-12-22 10:28:08,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:08,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588187987] [2020-12-22 10:28:08,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390420770] [2020-12-22 10:28:08,520 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:08,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:08,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:08,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:28:08,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:08,688 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:08,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:08,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-22 10:28:08,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068871679] [2020-12-22 10:28:08,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:28:08,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:08,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:28:08,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:28:08,690 INFO L87 Difference]: Start difference. First operand 81 states and 202 transitions. Second operand 9 states. [2020-12-22 10:28:08,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:08,807 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-12-22 10:28:08,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:28:08,808 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-22 10:28:08,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:08,809 INFO L225 Difference]: With dead ends: 104 [2020-12-22 10:28:08,810 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 10:28:08,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:28:08,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 10:28:08,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-12-22 10:28:08,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 10:28:08,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 206 transitions. [2020-12-22 10:28:08,816 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 206 transitions. Word has length 9 [2020-12-22 10:28:08,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:08,816 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 206 transitions. [2020-12-22 10:28:08,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:28:08,816 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 206 transitions. [2020-12-22 10:28:08,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:28:08,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:08,817 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:09,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:09,031 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:09,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:09,032 INFO L82 PathProgramCache]: Analyzing trace with hash 1795907071, now seen corresponding path program 1 times [2020-12-22 10:28:09,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:09,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195759540] [2020-12-22 10:28:09,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:09,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:09,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:09,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195759540] [2020-12-22 10:28:09,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:09,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:28:09,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513949269] [2020-12-22 10:28:09,109 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:28:09,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:09,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:28:09,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:28:09,111 INFO L87 Difference]: Start difference. First operand 82 states and 206 transitions. Second operand 6 states. [2020-12-22 10:28:09,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:09,185 INFO L93 Difference]: Finished difference Result 101 states and 242 transitions. [2020-12-22 10:28:09,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:28:09,186 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:28:09,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:09,188 INFO L225 Difference]: With dead ends: 101 [2020-12-22 10:28:09,188 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 10:28:09,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:28:09,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 10:28:09,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2020-12-22 10:28:09,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 10:28:09,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 216 transitions. [2020-12-22 10:28:09,200 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 216 transitions. Word has length 10 [2020-12-22 10:28:09,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:09,201 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 216 transitions. [2020-12-22 10:28:09,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:28:09,201 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 216 transitions. [2020-12-22 10:28:09,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:28:09,205 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:09,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:09,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-22 10:28:09,205 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:09,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:09,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1796275351, now seen corresponding path program 2 times [2020-12-22 10:28:09,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:09,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632428734] [2020-12-22 10:28:09,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:09,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632428734] [2020-12-22 10:28:09,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:09,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:28:09,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513332009] [2020-12-22 10:28:09,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:28:09,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:09,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:28:09,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:28:09,312 INFO L87 Difference]: Start difference. First operand 88 states and 216 transitions. Second operand 6 states. [2020-12-22 10:28:09,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:09,404 INFO L93 Difference]: Finished difference Result 116 states and 272 transitions. [2020-12-22 10:28:09,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:28:09,405 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:28:09,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:09,406 INFO L225 Difference]: With dead ends: 116 [2020-12-22 10:28:09,406 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 10:28:09,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:28:09,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 10:28:09,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2020-12-22 10:28:09,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-22 10:28:09,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 214 transitions. [2020-12-22 10:28:09,413 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 214 transitions. Word has length 10 [2020-12-22 10:28:09,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:09,413 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 214 transitions. [2020-12-22 10:28:09,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:28:09,414 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 214 transitions. [2020-12-22 10:28:09,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:28:09,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:09,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:09,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-22 10:28:09,415 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:09,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:09,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1458823941, now seen corresponding path program 3 times [2020-12-22 10:28:09,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:09,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230105035] [2020-12-22 10:28:09,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:09,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230105035] [2020-12-22 10:28:09,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:28:09,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:28:09,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031528767] [2020-12-22 10:28:09,498 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:28:09,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:09,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:28:09,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:28:09,499 INFO L87 Difference]: Start difference. First operand 87 states and 214 transitions. Second operand 6 states. [2020-12-22 10:28:09,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:09,583 INFO L93 Difference]: Finished difference Result 110 states and 262 transitions. [2020-12-22 10:28:09,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:28:09,584 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:28:09,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:09,586 INFO L225 Difference]: With dead ends: 110 [2020-12-22 10:28:09,586 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 10:28:09,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:28:09,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 10:28:09,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2020-12-22 10:28:09,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 10:28:09,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-12-22 10:28:09,595 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-12-22 10:28:09,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:09,595 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-12-22 10:28:09,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:28:09,595 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-12-22 10:28:09,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:28:09,596 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:09,596 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:09,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-22 10:28:09,596 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:09,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:09,597 INFO L82 PathProgramCache]: Analyzing trace with hash 166689468, now seen corresponding path program 6 times [2020-12-22 10:28:09,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:09,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348485355] [2020-12-22 10:28:09,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:09,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:09,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:09,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348485355] [2020-12-22 10:28:09,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096709267] [2020-12-22 10:28:09,682 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:09,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:28:09,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:09,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:28:09,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:09,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:09,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:28:09,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613279682] [2020-12-22 10:28:09,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:28:09,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:09,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:28:09,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:28:09,839 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-12-22 10:28:09,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:09,881 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-12-22 10:28:09,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:28:09,881 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-12-22 10:28:09,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:09,882 INFO L225 Difference]: With dead ends: 108 [2020-12-22 10:28:09,883 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 10:28:09,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:28:09,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 10:28:09,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-12-22 10:28:09,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 10:28:09,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-12-22 10:28:09,887 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-12-22 10:28:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:09,888 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-12-22 10:28:09,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:28:09,888 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-12-22 10:28:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:28:09,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:09,889 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:10,103 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-22 10:28:10,104 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:10,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:10,105 INFO L82 PathProgramCache]: Analyzing trace with hash 520606548, now seen corresponding path program 7 times [2020-12-22 10:28:10,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:10,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837474425] [2020-12-22 10:28:10,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:10,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:10,185 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:10,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837474425] [2020-12-22 10:28:10,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1169294408] [2020-12-22 10:28:10,186 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:10,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:28:10,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:10,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:10,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:10,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:28:10,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357696156] [2020-12-22 10:28:10,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:28:10,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:10,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:28:10,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:28:10,394 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-12-22 10:28:10,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:10,451 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-12-22 10:28:10,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:28:10,452 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-12-22 10:28:10,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:10,453 INFO L225 Difference]: With dead ends: 116 [2020-12-22 10:28:10,454 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 10:28:10,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:28:10,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 10:28:10,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-12-22 10:28:10,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-22 10:28:10,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-12-22 10:28:10,459 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-12-22 10:28:10,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:10,459 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-12-22 10:28:10,460 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:28:10,460 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-12-22 10:28:10,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:28:10,460 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:10,460 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:10,673 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:10,674 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:10,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:10,675 INFO L82 PathProgramCache]: Analyzing trace with hash 521298468, now seen corresponding path program 8 times [2020-12-22 10:28:10,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:10,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614481344] [2020-12-22 10:28:10,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:10,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:10,793 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:10,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614481344] [2020-12-22 10:28:10,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176807546] [2020-12-22 10:28:10,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:10,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:10,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:10,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:28:10,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:10,954 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:10,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:10,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:28:10,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036259808] [2020-12-22 10:28:10,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:28:10,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:10,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:28:10,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:28:10,956 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-12-22 10:28:11,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:11,035 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-12-22 10:28:11,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:28:11,035 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-12-22 10:28:11,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:11,037 INFO L225 Difference]: With dead ends: 115 [2020-12-22 10:28:11,037 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 10:28:11,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:28:11,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 10:28:11,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-12-22 10:28:11,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 10:28:11,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-12-22 10:28:11,041 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-12-22 10:28:11,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:11,041 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-12-22 10:28:11,042 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:28:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-12-22 10:28:11,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:28:11,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:11,042 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:11,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 10:28:11,257 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:11,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:11,258 INFO L82 PathProgramCache]: Analyzing trace with hash 521320788, now seen corresponding path program 9 times [2020-12-22 10:28:11,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:11,258 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740146109] [2020-12-22 10:28:11,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:11,326 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:11,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740146109] [2020-12-22 10:28:11,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410768369] [2020-12-22 10:28:11,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:11,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:28:11,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:11,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:28:11,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:11,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:11,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:11,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:28:11,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1908614857] [2020-12-22 10:28:11,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:28:11,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:11,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:28:11,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:28:11,482 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-12-22 10:28:11,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:11,592 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-12-22 10:28:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:28:11,592 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-12-22 10:28:11,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:11,593 INFO L225 Difference]: With dead ends: 124 [2020-12-22 10:28:11,594 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 10:28:11,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:28:11,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 10:28:11,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-12-22 10:28:11,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 10:28:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-12-22 10:28:11,598 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-12-22 10:28:11,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:11,599 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-12-22 10:28:11,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:28:11,599 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-12-22 10:28:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:11,600 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:11,600 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:11,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 10:28:11,814 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:11,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:11,815 INFO L82 PathProgramCache]: Analyzing trace with hash 913752204, now seen corresponding path program 3 times [2020-12-22 10:28:11,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:11,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419141170] [2020-12-22 10:28:11,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:11,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:11,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:11,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419141170] [2020-12-22 10:28:11,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060753648] [2020-12-22 10:28:11,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:11,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:28:11,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:11,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:11,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:12,132 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:12,157 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:12,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:12,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071393779] [2020-12-22 10:28:12,158 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:12,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:12,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:12,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:12,159 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 14 states. [2020-12-22 10:28:12,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:12,342 INFO L93 Difference]: Finished difference Result 161 states and 377 transitions. [2020-12-22 10:28:12,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:28:12,343 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-22 10:28:12,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:12,344 INFO L225 Difference]: With dead ends: 161 [2020-12-22 10:28:12,344 INFO L226 Difference]: Without dead ends: 153 [2020-12-22 10:28:12,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:28:12,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-22 10:28:12,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2020-12-22 10:28:12,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 10:28:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 264 transitions. [2020-12-22 10:28:12,350 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 264 transitions. Word has length 11 [2020-12-22 10:28:12,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:12,350 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 264 transitions. [2020-12-22 10:28:12,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:12,351 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 264 transitions. [2020-12-22 10:28:12,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:12,351 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:12,352 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:12,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 10:28:12,566 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:12,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:12,567 INFO L82 PathProgramCache]: Analyzing trace with hash 187063968, now seen corresponding path program 4 times [2020-12-22 10:28:12,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:12,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724559276] [2020-12-22 10:28:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:12,641 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:12,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724559276] [2020-12-22 10:28:12,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741552925] [2020-12-22 10:28:12,642 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:12,717 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:12,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:12,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:28:12,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:12,805 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:12,805 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:12,805 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:28:12,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188150766] [2020-12-22 10:28:12,806 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:28:12,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:12,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:28:12,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:28:12,807 INFO L87 Difference]: Start difference. First operand 104 states and 264 transitions. Second operand 11 states. [2020-12-22 10:28:12,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:12,881 INFO L93 Difference]: Finished difference Result 126 states and 306 transitions. [2020-12-22 10:28:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:28:12,881 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:28:12,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:12,883 INFO L225 Difference]: With dead ends: 126 [2020-12-22 10:28:12,883 INFO L226 Difference]: Without dead ends: 124 [2020-12-22 10:28:12,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:28:12,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-22 10:28:12,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2020-12-22 10:28:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 10:28:12,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 276 transitions. [2020-12-22 10:28:12,887 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 276 transitions. Word has length 11 [2020-12-22 10:28:12,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:12,887 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 276 transitions. [2020-12-22 10:28:12,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:28:12,888 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 276 transitions. [2020-12-22 10:28:12,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:12,888 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:12,888 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:13,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 10:28:13,103 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:13,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:13,104 INFO L82 PathProgramCache]: Analyzing trace with hash 187432248, now seen corresponding path program 5 times [2020-12-22 10:28:13,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:13,105 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110662369] [2020-12-22 10:28:13,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:13,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:13,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:13,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110662369] [2020-12-22 10:28:13,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602779558] [2020-12-22 10:28:13,166 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:13,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:13,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:13,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:28:13,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:13,307 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:28:13,310 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:28:13,314 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:13,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:13,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:28:13,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343496478] [2020-12-22 10:28:13,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:28:13,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:13,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:28:13,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:28:13,327 INFO L87 Difference]: Start difference. First operand 110 states and 276 transitions. Second operand 11 states. [2020-12-22 10:28:13,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:13,578 INFO L93 Difference]: Finished difference Result 155 states and 373 transitions. [2020-12-22 10:28:13,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:28:13,579 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:28:13,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:13,580 INFO L225 Difference]: With dead ends: 155 [2020-12-22 10:28:13,580 INFO L226 Difference]: Without dead ends: 147 [2020-12-22 10:28:13,582 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:28:13,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-22 10:28:13,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 106. [2020-12-22 10:28:13,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 10:28:13,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 270 transitions. [2020-12-22 10:28:13,587 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 270 transitions. Word has length 11 [2020-12-22 10:28:13,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:13,587 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 270 transitions. [2020-12-22 10:28:13,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:28:13,588 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 270 transitions. [2020-12-22 10:28:13,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:13,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:13,588 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:13,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 10:28:13,803 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:13,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:13,804 INFO L82 PathProgramCache]: Analyzing trace with hash -161455279, now seen corresponding path program 6 times [2020-12-22 10:28:13,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:13,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510154644] [2020-12-22 10:28:13,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:13,896 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:13,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510154644] [2020-12-22 10:28:13,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085641246] [2020-12-22 10:28:13,897 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:13,976 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:28:13,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:13,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:28:13,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:14,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:14,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:28:14,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107735143] [2020-12-22 10:28:14,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:28:14,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:14,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:28:14,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:28:14,079 INFO L87 Difference]: Start difference. First operand 106 states and 270 transitions. Second operand 11 states. [2020-12-22 10:28:14,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:14,182 INFO L93 Difference]: Finished difference Result 136 states and 326 transitions. [2020-12-22 10:28:14,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:14,182 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:28:14,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:14,183 INFO L225 Difference]: With dead ends: 136 [2020-12-22 10:28:14,184 INFO L226 Difference]: Without dead ends: 134 [2020-12-22 10:28:14,184 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:14,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-22 10:28:14,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2020-12-22 10:28:14,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-22 10:28:14,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 277 transitions. [2020-12-22 10:28:14,188 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 277 transitions. Word has length 11 [2020-12-22 10:28:14,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:14,189 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 277 transitions. [2020-12-22 10:28:14,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:28:14,189 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 277 transitions. [2020-12-22 10:28:14,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:14,189 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:14,190 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:14,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:14,406 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:14,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:14,407 INFO L82 PathProgramCache]: Analyzing trace with hash -150038599, now seen corresponding path program 7 times [2020-12-22 10:28:14,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:14,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114945168] [2020-12-22 10:28:14,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:14,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:14,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:14,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114945168] [2020-12-22 10:28:14,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267751341] [2020-12-22 10:28:14,481 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:14,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:28:14,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:14,625 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:14,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:14,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:28:14,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014877558] [2020-12-22 10:28:14,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:28:14,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:14,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:28:14,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:28:14,627 INFO L87 Difference]: Start difference. First operand 111 states and 277 transitions. Second operand 11 states. [2020-12-22 10:28:14,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:14,751 INFO L93 Difference]: Finished difference Result 137 states and 330 transitions. [2020-12-22 10:28:14,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:28:14,752 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:28:14,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:14,753 INFO L225 Difference]: With dead ends: 137 [2020-12-22 10:28:14,753 INFO L226 Difference]: Without dead ends: 135 [2020-12-22 10:28:14,754 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:28:14,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-22 10:28:14,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2020-12-22 10:28:14,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-22 10:28:14,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 284 transitions. [2020-12-22 10:28:14,758 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 284 transitions. Word has length 11 [2020-12-22 10:28:14,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:14,758 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 284 transitions. [2020-12-22 10:28:14,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:28:14,758 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 284 transitions. [2020-12-22 10:28:14,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:14,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:14,759 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:14,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-12-22 10:28:14,973 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:14,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:14,973 INFO L82 PathProgramCache]: Analyzing trace with hash -150016279, now seen corresponding path program 8 times [2020-12-22 10:28:14,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:14,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125366933] [2020-12-22 10:28:14,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:14,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:15,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:15,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125366933] [2020-12-22 10:28:15,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961637063] [2020-12-22 10:28:15,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:15,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:15,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:15,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:28:15,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:15,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:15,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:15,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:28:15,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311462397] [2020-12-22 10:28:15,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:28:15,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:15,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:28:15,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:28:15,241 INFO L87 Difference]: Start difference. First operand 113 states and 284 transitions. Second operand 11 states. [2020-12-22 10:28:15,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:15,447 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-12-22 10:28:15,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:28:15,447 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:28:15,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:15,448 INFO L225 Difference]: With dead ends: 160 [2020-12-22 10:28:15,449 INFO L226 Difference]: Without dead ends: 152 [2020-12-22 10:28:15,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:28:15,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-22 10:28:15,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 111. [2020-12-22 10:28:15,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-22 10:28:15,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 280 transitions. [2020-12-22 10:28:15,453 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 280 transitions. Word has length 11 [2020-12-22 10:28:15,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:15,454 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 280 transitions. [2020-12-22 10:28:15,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:28:15,454 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 280 transitions. [2020-12-22 10:28:15,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:15,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:15,455 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:15,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:15,669 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:15,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:15,670 INFO L82 PathProgramCache]: Analyzing trace with hash 1919347069, now seen corresponding path program 9 times [2020-12-22 10:28:15,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:15,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577236126] [2020-12-22 10:28:15,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:15,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:15,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577236126] [2020-12-22 10:28:15,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131159883] [2020-12-22 10:28:15,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:15,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:28:15,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:15,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:28:15,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:15,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:15,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:28:15,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733693063] [2020-12-22 10:28:15,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:28:15,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:15,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:28:15,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:28:15,899 INFO L87 Difference]: Start difference. First operand 111 states and 280 transitions. Second operand 11 states. [2020-12-22 10:28:15,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:15,994 INFO L93 Difference]: Finished difference Result 136 states and 330 transitions. [2020-12-22 10:28:15,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:28:15,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:28:15,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:15,997 INFO L225 Difference]: With dead ends: 136 [2020-12-22 10:28:15,998 INFO L226 Difference]: Without dead ends: 134 [2020-12-22 10:28:15,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:28:15,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-22 10:28:16,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 112. [2020-12-22 10:28:16,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 10:28:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 282 transitions. [2020-12-22 10:28:16,005 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 282 transitions. Word has length 11 [2020-12-22 10:28:16,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:16,005 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 282 transitions. [2020-12-22 10:28:16,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:28:16,005 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 282 transitions. [2020-12-22 10:28:16,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:16,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:16,006 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:16,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-22 10:28:16,220 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:16,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:16,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2021703147, now seen corresponding path program 10 times [2020-12-22 10:28:16,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:16,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266863795] [2020-12-22 10:28:16,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:16,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:16,280 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:16,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266863795] [2020-12-22 10:28:16,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375383716] [2020-12-22 10:28:16,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:16,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:16,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:16,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:28:16,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:16,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:16,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:28:16,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840996877] [2020-12-22 10:28:16,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:28:16,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:16,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:28:16,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:28:16,430 INFO L87 Difference]: Start difference. First operand 112 states and 282 transitions. Second operand 11 states. [2020-12-22 10:28:16,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:16,530 INFO L93 Difference]: Finished difference Result 142 states and 339 transitions. [2020-12-22 10:28:16,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:16,532 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:28:16,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:16,533 INFO L225 Difference]: With dead ends: 142 [2020-12-22 10:28:16,533 INFO L226 Difference]: Without dead ends: 140 [2020-12-22 10:28:16,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:16,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-22 10:28:16,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-12-22 10:28:16,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 10:28:16,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 277 transitions. [2020-12-22 10:28:16,548 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 277 transitions. Word has length 11 [2020-12-22 10:28:16,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:16,548 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 277 transitions. [2020-12-22 10:28:16,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:28:16,548 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 277 transitions. [2020-12-22 10:28:16,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:16,549 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:16,549 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:16,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:16,764 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:16,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:16,765 INFO L82 PathProgramCache]: Analyzing trace with hash -2021097717, now seen corresponding path program 11 times [2020-12-22 10:28:16,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:16,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471457173] [2020-12-22 10:28:16,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:16,835 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:16,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471457173] [2020-12-22 10:28:16,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505790445] [2020-12-22 10:28:16,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:16,895 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:16,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:16,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:28:16,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:16,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:16,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:16,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:28:16,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842477564] [2020-12-22 10:28:16,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:28:16,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:16,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:28:16,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:28:16,998 INFO L87 Difference]: Start difference. First operand 110 states and 277 transitions. Second operand 11 states. [2020-12-22 10:28:17,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:17,103 INFO L93 Difference]: Finished difference Result 142 states and 340 transitions. [2020-12-22 10:28:17,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:28:17,103 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:28:17,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:17,105 INFO L225 Difference]: With dead ends: 142 [2020-12-22 10:28:17,105 INFO L226 Difference]: Without dead ends: 140 [2020-12-22 10:28:17,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:28:17,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-22 10:28:17,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 112. [2020-12-22 10:28:17,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 10:28:17,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 284 transitions. [2020-12-22 10:28:17,110 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 284 transitions. Word has length 11 [2020-12-22 10:28:17,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:17,110 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 284 transitions. [2020-12-22 10:28:17,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:28:17,111 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 284 transitions. [2020-12-22 10:28:17,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:17,111 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:17,111 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:17,325 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:28:17,326 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:17,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:17,327 INFO L82 PathProgramCache]: Analyzing trace with hash -2021078280, now seen corresponding path program 12 times [2020-12-22 10:28:17,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:17,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637045765] [2020-12-22 10:28:17,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:17,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:17,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:17,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637045765] [2020-12-22 10:28:17,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434887386] [2020-12-22 10:28:17,403 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:17,470 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:28:17,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:17,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:28:17,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:17,552 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:17,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:17,571 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:17,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:28:17,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778384246] [2020-12-22 10:28:17,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:28:17,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:17,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:28:17,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:28:17,573 INFO L87 Difference]: Start difference. First operand 112 states and 284 transitions. Second operand 11 states. [2020-12-22 10:28:17,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:17,746 INFO L93 Difference]: Finished difference Result 157 states and 377 transitions. [2020-12-22 10:28:17,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:28:17,747 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:28:17,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:17,749 INFO L225 Difference]: With dead ends: 157 [2020-12-22 10:28:17,749 INFO L226 Difference]: Without dead ends: 149 [2020-12-22 10:28:17,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:28:17,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-22 10:28:17,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2020-12-22 10:28:17,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-22 10:28:17,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 285 transitions. [2020-12-22 10:28:17,754 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 285 transitions. Word has length 11 [2020-12-22 10:28:17,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:17,754 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 285 transitions. [2020-12-22 10:28:17,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:28:17,754 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 285 transitions. [2020-12-22 10:28:17,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:17,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:17,755 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:17,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:28:17,970 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:17,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:17,971 INFO L82 PathProgramCache]: Analyzing trace with hash -2021075397, now seen corresponding path program 13 times [2020-12-22 10:28:17,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:17,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116743468] [2020-12-22 10:28:17,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:18,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116743468] [2020-12-22 10:28:18,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186260424] [2020-12-22 10:28:18,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:18,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:28:18,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:18,195 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:18,196 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:18,196 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-22 10:28:18,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629853432] [2020-12-22 10:28:18,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:28:18,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:18,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:28:18,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:28:18,199 INFO L87 Difference]: Start difference. First operand 113 states and 285 transitions. Second operand 11 states. [2020-12-22 10:28:18,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:18,455 INFO L93 Difference]: Finished difference Result 161 states and 389 transitions. [2020-12-22 10:28:18,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:28:18,456 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-22 10:28:18,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:18,457 INFO L225 Difference]: With dead ends: 161 [2020-12-22 10:28:18,457 INFO L226 Difference]: Without dead ends: 153 [2020-12-22 10:28:18,458 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:28:18,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-22 10:28:18,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2020-12-22 10:28:18,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-22 10:28:18,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 283 transitions. [2020-12-22 10:28:18,462 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 283 transitions. Word has length 11 [2020-12-22 10:28:18,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:18,462 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 283 transitions. [2020-12-22 10:28:18,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:28:18,463 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 283 transitions. [2020-12-22 10:28:18,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:18,463 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:18,463 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:18,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 10:28:18,668 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:18,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:18,669 INFO L82 PathProgramCache]: Analyzing trace with hash 872406580, now seen corresponding path program 10 times [2020-12-22 10:28:18,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:18,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671266667] [2020-12-22 10:28:18,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:18,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:18,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:18,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671266667] [2020-12-22 10:28:18,790 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360226631] [2020-12-22 10:28:18,790 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:18,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:18,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:18,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:18,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:18,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:18,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:18,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534224479] [2020-12-22 10:28:18,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:18,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:18,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:18,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:18,984 INFO L87 Difference]: Start difference. First operand 112 states and 283 transitions. Second operand 14 states. [2020-12-22 10:28:19,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:19,037 INFO L93 Difference]: Finished difference Result 139 states and 337 transitions. [2020-12-22 10:28:19,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:28:19,038 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-22 10:28:19,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:19,039 INFO L225 Difference]: With dead ends: 139 [2020-12-22 10:28:19,039 INFO L226 Difference]: Without dead ends: 136 [2020-12-22 10:28:19,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:19,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-22 10:28:19,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-12-22 10:28:19,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 10:28:19,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-12-22 10:28:19,044 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 11 [2020-12-22 10:28:19,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:19,044 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-12-22 10:28:19,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:19,044 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-12-22 10:28:19,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:19,045 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:19,045 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:19,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 10:28:19,260 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:19,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:19,260 INFO L82 PathProgramCache]: Analyzing trace with hash -1041065828, now seen corresponding path program 11 times [2020-12-22 10:28:19,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:19,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755206218] [2020-12-22 10:28:19,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:19,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755206218] [2020-12-22 10:28:19,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781905200] [2020-12-22 10:28:19,354 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:19,426 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:28:19,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:19,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:19,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:19,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:19,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:19,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:19,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759047389] [2020-12-22 10:28:19,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:19,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:19,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:19,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:19,543 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 14 states. [2020-12-22 10:28:19,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:19,613 INFO L93 Difference]: Finished difference Result 150 states and 358 transitions. [2020-12-22 10:28:19,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:28:19,614 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-22 10:28:19,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:19,615 INFO L225 Difference]: With dead ends: 150 [2020-12-22 10:28:19,615 INFO L226 Difference]: Without dead ends: 147 [2020-12-22 10:28:19,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:28:19,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-22 10:28:19,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 117. [2020-12-22 10:28:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-22 10:28:19,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-12-22 10:28:19,620 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 11 [2020-12-22 10:28:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:19,620 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-12-22 10:28:19,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-12-22 10:28:19,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:19,621 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:19,621 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:19,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 10:28:19,837 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:19,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:19,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1019616308, now seen corresponding path program 12 times [2020-12-22 10:28:19,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:19,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159240197] [2020-12-22 10:28:19,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:19,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:19,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:19,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159240197] [2020-12-22 10:28:19,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793243120] [2020-12-22 10:28:19,921 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:19,992 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:28:19,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:19,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:19,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:20,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:20,107 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:20,107 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:20,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371699977] [2020-12-22 10:28:20,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:20,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:20,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:20,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:20,110 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 14 states. [2020-12-22 10:28:20,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:20,192 INFO L93 Difference]: Finished difference Result 148 states and 353 transitions. [2020-12-22 10:28:20,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:20,193 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-22 10:28:20,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:20,194 INFO L225 Difference]: With dead ends: 148 [2020-12-22 10:28:20,194 INFO L226 Difference]: Without dead ends: 145 [2020-12-22 10:28:20,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:20,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-22 10:28:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2020-12-22 10:28:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-22 10:28:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 296 transitions. [2020-12-22 10:28:20,201 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 296 transitions. Word has length 11 [2020-12-22 10:28:20,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:20,201 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 296 transitions. [2020-12-22 10:28:20,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:20,201 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 296 transitions. [2020-12-22 10:28:20,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:20,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:20,202 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:20,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:20,416 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:20,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:20,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1018924388, now seen corresponding path program 13 times [2020-12-22 10:28:20,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:20,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2060126201] [2020-12-22 10:28:20,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:20,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:20,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:20,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2060126201] [2020-12-22 10:28:20,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [72593971] [2020-12-22 10:28:20,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:20,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:20,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:20,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:20,704 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:20,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:20,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:20,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765502545] [2020-12-22 10:28:20,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:20,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:20,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:20,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:20,706 INFO L87 Difference]: Start difference. First operand 118 states and 296 transitions. Second operand 14 states. [2020-12-22 10:28:20,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:20,843 INFO L93 Difference]: Finished difference Result 147 states and 353 transitions. [2020-12-22 10:28:20,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:28:20,843 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-22 10:28:20,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:20,845 INFO L225 Difference]: With dead ends: 147 [2020-12-22 10:28:20,845 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 10:28:20,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:20,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 10:28:20,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 120. [2020-12-22 10:28:20,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-22 10:28:20,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 303 transitions. [2020-12-22 10:28:20,851 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 303 transitions. Word has length 11 [2020-12-22 10:28:20,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:20,851 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 303 transitions. [2020-12-22 10:28:20,851 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:20,851 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 303 transitions. [2020-12-22 10:28:20,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:28:20,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:20,852 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:21,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:21,067 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:21,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:21,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1018902068, now seen corresponding path program 14 times [2020-12-22 10:28:21,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:21,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808320509] [2020-12-22 10:28:21,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:21,156 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:21,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808320509] [2020-12-22 10:28:21,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103879304] [2020-12-22 10:28:21,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:21,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:21,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:21,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:21,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:21,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:21,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:21,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:21,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872405264] [2020-12-22 10:28:21,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:21,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:21,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:21,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:21,364 INFO L87 Difference]: Start difference. First operand 120 states and 303 transitions. Second operand 14 states. [2020-12-22 10:28:21,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:21,611 INFO L93 Difference]: Finished difference Result 172 states and 415 transitions. [2020-12-22 10:28:21,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:28:21,612 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-22 10:28:21,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:21,613 INFO L225 Difference]: With dead ends: 172 [2020-12-22 10:28:21,614 INFO L226 Difference]: Without dead ends: 160 [2020-12-22 10:28:21,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:28:21,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-22 10:28:21,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 125. [2020-12-22 10:28:21,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-22 10:28:21,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 320 transitions. [2020-12-22 10:28:21,620 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 320 transitions. Word has length 11 [2020-12-22 10:28:21,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:21,621 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 320 transitions. [2020-12-22 10:28:21,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:21,621 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 320 transitions. [2020-12-22 10:28:21,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:21,622 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:21,622 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:21,835 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:21,835 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:21,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:21,836 INFO L82 PathProgramCache]: Analyzing trace with hash 1852535327, now seen corresponding path program 14 times [2020-12-22 10:28:21,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:21,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077287775] [2020-12-22 10:28:21,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:21,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:21,939 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:21,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077287775] [2020-12-22 10:28:21,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370457504] [2020-12-22 10:28:21,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:22,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:22,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:22,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:22,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:22,135 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:22,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:22,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:22,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016106767] [2020-12-22 10:28:22,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:22,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:22,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:22,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:22,137 INFO L87 Difference]: Start difference. First operand 125 states and 320 transitions. Second operand 14 states. [2020-12-22 10:28:22,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:22,250 INFO L93 Difference]: Finished difference Result 153 states and 371 transitions. [2020-12-22 10:28:22,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:28:22,251 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:28:22,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:22,252 INFO L225 Difference]: With dead ends: 153 [2020-12-22 10:28:22,252 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 10:28:22,253 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:28:22,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 10:28:22,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 131. [2020-12-22 10:28:22,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-22 10:28:22,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 332 transitions. [2020-12-22 10:28:22,258 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 332 transitions. Word has length 12 [2020-12-22 10:28:22,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:22,258 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 332 transitions. [2020-12-22 10:28:22,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:22,258 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 332 transitions. [2020-12-22 10:28:22,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:22,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:22,259 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:22,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-22 10:28:22,470 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:22,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:22,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1852903607, now seen corresponding path program 15 times [2020-12-22 10:28:22,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:22,471 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114231312] [2020-12-22 10:28:22,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:22,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:22,540 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:22,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114231312] [2020-12-22 10:28:22,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2014754774] [2020-12-22 10:28:22,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:22,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:28:22,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:22,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:22,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:22,727 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:28:22,731 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:28:22,733 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:22,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:22,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:22,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:28:22,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739116934] [2020-12-22 10:28:22,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:28:22,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:22,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:28:22,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:28:22,746 INFO L87 Difference]: Start difference. First operand 131 states and 332 transitions. Second operand 13 states. [2020-12-22 10:28:23,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:23,044 INFO L93 Difference]: Finished difference Result 187 states and 451 transitions. [2020-12-22 10:28:23,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:28:23,044 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:28:23,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:23,046 INFO L225 Difference]: With dead ends: 187 [2020-12-22 10:28:23,046 INFO L226 Difference]: Without dead ends: 179 [2020-12-22 10:28:23,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:28:23,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-22 10:28:23,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 126. [2020-12-22 10:28:23,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-22 10:28:23,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 321 transitions. [2020-12-22 10:28:23,052 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 321 transitions. Word has length 12 [2020-12-22 10:28:23,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:23,052 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 321 transitions. [2020-12-22 10:28:23,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:28:23,053 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 321 transitions. [2020-12-22 10:28:23,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:23,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:23,053 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:23,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:23,269 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:23,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:23,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1504016080, now seen corresponding path program 16 times [2020-12-22 10:28:23,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:23,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256308680] [2020-12-22 10:28:23,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:23,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:23,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256308680] [2020-12-22 10:28:23,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440056629] [2020-12-22 10:28:23,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:23,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:23,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:23,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:23,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:23,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:23,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:23,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468894835] [2020-12-22 10:28:23,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:23,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:23,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:23,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:23,558 INFO L87 Difference]: Start difference. First operand 126 states and 321 transitions. Second operand 14 states. [2020-12-22 10:28:23,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:23,748 INFO L93 Difference]: Finished difference Result 167 states and 397 transitions. [2020-12-22 10:28:23,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:28:23,748 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:28:23,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:23,749 INFO L225 Difference]: With dead ends: 167 [2020-12-22 10:28:23,749 INFO L226 Difference]: Without dead ends: 165 [2020-12-22 10:28:23,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:28:23,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-22 10:28:23,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 130. [2020-12-22 10:28:23,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-22 10:28:23,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 327 transitions. [2020-12-22 10:28:23,755 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 327 transitions. Word has length 12 [2020-12-22 10:28:23,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:23,756 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 327 transitions. [2020-12-22 10:28:23,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:23,756 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 327 transitions. [2020-12-22 10:28:23,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:23,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:23,757 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:23,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 10:28:23,970 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:23,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:23,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1515432760, now seen corresponding path program 17 times [2020-12-22 10:28:23,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:23,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035328729] [2020-12-22 10:28:23,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:23,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:24,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:24,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035328729] [2020-12-22 10:28:24,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1713403680] [2020-12-22 10:28:24,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:24,111 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:24,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:24,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:24,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:24,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:24,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:24,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:24,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954744442] [2020-12-22 10:28:24,239 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:24,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:24,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:24,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:24,240 INFO L87 Difference]: Start difference. First operand 130 states and 327 transitions. Second operand 14 states. [2020-12-22 10:28:24,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:24,512 INFO L93 Difference]: Finished difference Result 165 states and 397 transitions. [2020-12-22 10:28:24,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:28:24,512 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:28:24,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:24,514 INFO L225 Difference]: With dead ends: 165 [2020-12-22 10:28:24,514 INFO L226 Difference]: Without dead ends: 163 [2020-12-22 10:28:24,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:28:24,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-22 10:28:24,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 132. [2020-12-22 10:28:24,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 10:28:24,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 334 transitions. [2020-12-22 10:28:24,519 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 334 transitions. Word has length 12 [2020-12-22 10:28:24,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:24,519 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 334 transitions. [2020-12-22 10:28:24,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:24,520 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 334 transitions. [2020-12-22 10:28:24,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:24,520 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:24,520 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:24,734 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:24,735 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:24,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:24,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1515455080, now seen corresponding path program 18 times [2020-12-22 10:28:24,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:24,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435861067] [2020-12-22 10:28:24,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:24,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:24,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435861067] [2020-12-22 10:28:24,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573593631] [2020-12-22 10:28:24,819 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:24,895 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:28:24,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:24,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:24,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:24,990 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:28:24,993 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:28:24,995 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:25,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:25,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:25,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:28:25,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860077928] [2020-12-22 10:28:25,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:28:25,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:25,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:28:25,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:28:25,009 INFO L87 Difference]: Start difference. First operand 132 states and 334 transitions. Second operand 13 states. [2020-12-22 10:28:25,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:25,340 INFO L93 Difference]: Finished difference Result 190 states and 459 transitions. [2020-12-22 10:28:25,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:28:25,340 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:28:25,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:25,342 INFO L225 Difference]: With dead ends: 190 [2020-12-22 10:28:25,342 INFO L226 Difference]: Without dead ends: 182 [2020-12-22 10:28:25,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:25,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-22 10:28:25,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 126. [2020-12-22 10:28:25,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-22 10:28:25,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 321 transitions. [2020-12-22 10:28:25,349 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 321 transitions. Word has length 12 [2020-12-22 10:28:25,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:25,350 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 321 transitions. [2020-12-22 10:28:25,350 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:28:25,350 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 321 transitions. [2020-12-22 10:28:25,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:25,353 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:25,354 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:25,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 10:28:25,568 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:25,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:25,568 INFO L82 PathProgramCache]: Analyzing trace with hash -710148868, now seen corresponding path program 19 times [2020-12-22 10:28:25,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:25,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397595920] [2020-12-22 10:28:25,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:25,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:25,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:25,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397595920] [2020-12-22 10:28:25,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110175941] [2020-12-22 10:28:25,648 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:25,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:25,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:25,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:25,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:25,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:25,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961848702] [2020-12-22 10:28:25,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:25,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:25,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:25,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:25,855 INFO L87 Difference]: Start difference. First operand 126 states and 321 transitions. Second operand 14 states. [2020-12-22 10:28:26,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:26,056 INFO L93 Difference]: Finished difference Result 171 states and 407 transitions. [2020-12-22 10:28:26,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:28:26,057 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:28:26,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:26,058 INFO L225 Difference]: With dead ends: 171 [2020-12-22 10:28:26,058 INFO L226 Difference]: Without dead ends: 169 [2020-12-22 10:28:26,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:28:26,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-22 10:28:26,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 131. [2020-12-22 10:28:26,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-22 10:28:26,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 328 transitions. [2020-12-22 10:28:26,063 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 328 transitions. Word has length 12 [2020-12-22 10:28:26,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:26,063 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 328 transitions. [2020-12-22 10:28:26,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:26,064 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 328 transitions. [2020-12-22 10:28:26,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:26,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:26,064 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:26,278 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:26,279 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:26,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:26,280 INFO L82 PathProgramCache]: Analyzing trace with hash -356231788, now seen corresponding path program 20 times [2020-12-22 10:28:26,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:26,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541493521] [2020-12-22 10:28:26,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:26,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:26,359 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:26,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541493521] [2020-12-22 10:28:26,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792205130] [2020-12-22 10:28:26,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:26,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:26,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:26,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:26,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:26,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:26,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:26,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988210405] [2020-12-22 10:28:26,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:26,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:26,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:26,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:26,561 INFO L87 Difference]: Start difference. First operand 131 states and 328 transitions. Second operand 14 states. [2020-12-22 10:28:26,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:26,812 INFO L93 Difference]: Finished difference Result 183 states and 431 transitions. [2020-12-22 10:28:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:28:26,812 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:28:26,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:26,814 INFO L225 Difference]: With dead ends: 183 [2020-12-22 10:28:26,815 INFO L226 Difference]: Without dead ends: 181 [2020-12-22 10:28:26,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:28:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-22 10:28:26,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 133. [2020-12-22 10:28:26,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-22 10:28:26,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 335 transitions. [2020-12-22 10:28:26,821 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 335 transitions. Word has length 12 [2020-12-22 10:28:26,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:26,821 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 335 transitions. [2020-12-22 10:28:26,821 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:26,821 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 335 transitions. [2020-12-22 10:28:26,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:26,822 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:26,822 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:27,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 10:28:27,035 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:27,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:27,036 INFO L82 PathProgramCache]: Analyzing trace with hash -355626358, now seen corresponding path program 21 times [2020-12-22 10:28:27,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:27,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439268635] [2020-12-22 10:28:27,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:27,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:27,121 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:27,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439268635] [2020-12-22 10:28:27,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854702278] [2020-12-22 10:28:27,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:27,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:28:27,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:27,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:27,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:27,298 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:27,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:27,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:27,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942580260] [2020-12-22 10:28:27,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:27,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:27,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:27,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:27,300 INFO L87 Difference]: Start difference. First operand 133 states and 335 transitions. Second operand 14 states. [2020-12-22 10:28:27,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:27,582 INFO L93 Difference]: Finished difference Result 176 states and 423 transitions. [2020-12-22 10:28:27,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:28:27,583 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:28:27,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:27,584 INFO L225 Difference]: With dead ends: 176 [2020-12-22 10:28:27,585 INFO L226 Difference]: Without dead ends: 174 [2020-12-22 10:28:27,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:28:27,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-22 10:28:27,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 136. [2020-12-22 10:28:27,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-22 10:28:27,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 347 transitions. [2020-12-22 10:28:27,590 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 347 transitions. Word has length 12 [2020-12-22 10:28:27,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:27,591 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 347 transitions. [2020-12-22 10:28:27,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:27,591 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 347 transitions. [2020-12-22 10:28:27,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:27,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:27,592 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:27,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 10:28:27,808 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:27,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:27,811 INFO L82 PathProgramCache]: Analyzing trace with hash -355606921, now seen corresponding path program 22 times [2020-12-22 10:28:27,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:27,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964901063] [2020-12-22 10:28:27,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:27,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:27,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964901063] [2020-12-22 10:28:27,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239432130] [2020-12-22 10:28:27,879 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:27,936 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:27,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:27,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:27,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:28,024 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:28,033 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:28,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:28,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:28:28,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267501913] [2020-12-22 10:28:28,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:28:28,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:28,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:28:28,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:28:28,035 INFO L87 Difference]: Start difference. First operand 136 states and 347 transitions. Second operand 13 states. [2020-12-22 10:28:28,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:28,369 INFO L93 Difference]: Finished difference Result 194 states and 472 transitions. [2020-12-22 10:28:28,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:28:28,370 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:28:28,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:28,371 INFO L225 Difference]: With dead ends: 194 [2020-12-22 10:28:28,372 INFO L226 Difference]: Without dead ends: 186 [2020-12-22 10:28:28,372 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:28:28,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-22 10:28:28,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 136. [2020-12-22 10:28:28,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-22 10:28:28,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 347 transitions. [2020-12-22 10:28:28,377 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 347 transitions. Word has length 12 [2020-12-22 10:28:28,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:28,378 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 347 transitions. [2020-12-22 10:28:28,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:28:28,378 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 347 transitions. [2020-12-22 10:28:28,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:28,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:28,378 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:28,591 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 10:28:28,592 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:28,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:28,592 INFO L82 PathProgramCache]: Analyzing trace with hash -355604038, now seen corresponding path program 23 times [2020-12-22 10:28:28,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:28,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587691099] [2020-12-22 10:28:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:28,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:28,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:28,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587691099] [2020-12-22 10:28:28,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254690583] [2020-12-22 10:28:28,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:28,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:28,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:28,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:28,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:28,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:28,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:28,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:28:28,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145148250] [2020-12-22 10:28:28,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:28:28,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:28,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:28:28,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:28:28,824 INFO L87 Difference]: Start difference. First operand 136 states and 347 transitions. Second operand 13 states. [2020-12-22 10:28:29,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:29,277 INFO L93 Difference]: Finished difference Result 195 states and 472 transitions. [2020-12-22 10:28:29,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:28:29,278 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:28:29,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:29,279 INFO L225 Difference]: With dead ends: 195 [2020-12-22 10:28:29,279 INFO L226 Difference]: Without dead ends: 187 [2020-12-22 10:28:29,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:28:29,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-22 10:28:29,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 132. [2020-12-22 10:28:29,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-22 10:28:29,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 336 transitions. [2020-12-22 10:28:29,285 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 336 transitions. Word has length 12 [2020-12-22 10:28:29,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:29,285 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 336 transitions. [2020-12-22 10:28:29,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:28:29,285 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 336 transitions. [2020-12-22 10:28:29,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:29,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:29,286 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:29,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-22 10:28:29,499 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:29,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:29,500 INFO L82 PathProgramCache]: Analyzing trace with hash -629785520, now seen corresponding path program 24 times [2020-12-22 10:28:29,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:29,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14562022] [2020-12-22 10:28:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:29,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:29,581 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:29,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14562022] [2020-12-22 10:28:29,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715714504] [2020-12-22 10:28:29,582 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:29,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:28:29,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:29,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:29,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:29,765 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:29,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:29,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:29,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988939836] [2020-12-22 10:28:29,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:29,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:29,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:29,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:29,767 INFO L87 Difference]: Start difference. First operand 132 states and 336 transitions. Second operand 14 states. [2020-12-22 10:28:29,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:29,888 INFO L93 Difference]: Finished difference Result 168 states and 409 transitions. [2020-12-22 10:28:29,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:29,889 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:28:29,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:29,890 INFO L225 Difference]: With dead ends: 168 [2020-12-22 10:28:29,890 INFO L226 Difference]: Without dead ends: 166 [2020-12-22 10:28:29,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=199, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:28:29,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-22 10:28:29,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 137. [2020-12-22 10:28:29,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 10:28:29,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 349 transitions. [2020-12-22 10:28:29,896 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 349 transitions. Word has length 12 [2020-12-22 10:28:29,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:29,896 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 349 transitions. [2020-12-22 10:28:29,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:29,896 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 349 transitions. [2020-12-22 10:28:29,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:29,897 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:29,897 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:30,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:30,111 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:30,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:30,111 INFO L82 PathProgramCache]: Analyzing trace with hash -629782637, now seen corresponding path program 25 times [2020-12-22 10:28:30,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:30,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960579744] [2020-12-22 10:28:30,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:30,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960579744] [2020-12-22 10:28:30,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756422058] [2020-12-22 10:28:30,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:30,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:30,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:30,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:30,387 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:30,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:30,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:30,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14122610] [2020-12-22 10:28:30,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:30,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:30,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:30,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:30,389 INFO L87 Difference]: Start difference. First operand 137 states and 349 transitions. Second operand 14 states. [2020-12-22 10:28:30,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:30,544 INFO L93 Difference]: Finished difference Result 169 states and 411 transitions. [2020-12-22 10:28:30,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:28:30,545 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:28:30,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:30,547 INFO L225 Difference]: With dead ends: 169 [2020-12-22 10:28:30,547 INFO L226 Difference]: Without dead ends: 167 [2020-12-22 10:28:30,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=198, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:28:30,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-22 10:28:30,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 136. [2020-12-22 10:28:30,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-22 10:28:30,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 346 transitions. [2020-12-22 10:28:30,554 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 346 transitions. Word has length 12 [2020-12-22 10:28:30,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:30,554 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 346 transitions. [2020-12-22 10:28:30,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:30,555 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 346 transitions. [2020-12-22 10:28:30,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:30,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:30,555 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:30,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 10:28:30,768 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:30,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:30,769 INFO L82 PathProgramCache]: Analyzing trace with hash 1751709368, now seen corresponding path program 26 times [2020-12-22 10:28:30,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:30,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794028320] [2020-12-22 10:28:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:30,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:30,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794028320] [2020-12-22 10:28:30,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510155943] [2020-12-22 10:28:30,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:30,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:30,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:30,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:30,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:31,031 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:31,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:31,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:31,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483927573] [2020-12-22 10:28:31,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:31,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:31,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:31,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:31,033 INFO L87 Difference]: Start difference. First operand 136 states and 346 transitions. Second operand 14 states. [2020-12-22 10:28:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:31,182 INFO L93 Difference]: Finished difference Result 177 states and 427 transitions. [2020-12-22 10:28:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:28:31,182 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:28:31,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:31,184 INFO L225 Difference]: With dead ends: 177 [2020-12-22 10:28:31,184 INFO L226 Difference]: Without dead ends: 175 [2020-12-22 10:28:31,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:28:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-22 10:28:31,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 137. [2020-12-22 10:28:31,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 10:28:31,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 349 transitions. [2020-12-22 10:28:31,193 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 349 transitions. Word has length 12 [2020-12-22 10:28:31,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:31,193 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 349 transitions. [2020-12-22 10:28:31,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:31,195 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 349 transitions. [2020-12-22 10:28:31,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:31,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:31,196 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:31,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 10:28:31,410 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:31,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:31,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1751712251, now seen corresponding path program 27 times [2020-12-22 10:28:31,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:31,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143413855] [2020-12-22 10:28:31,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:31,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:31,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:31,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143413855] [2020-12-22 10:28:31,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641193483] [2020-12-22 10:28:31,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:31,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:28:31,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:31,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:31,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:31,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:31,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:31,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:31,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029032945] [2020-12-22 10:28:31,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:31,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:31,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:31,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:31,657 INFO L87 Difference]: Start difference. First operand 137 states and 349 transitions. Second operand 14 states. [2020-12-22 10:28:31,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:31,818 INFO L93 Difference]: Finished difference Result 174 states and 420 transitions. [2020-12-22 10:28:31,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:28:31,818 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:28:31,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:31,820 INFO L225 Difference]: With dead ends: 174 [2020-12-22 10:28:31,820 INFO L226 Difference]: Without dead ends: 172 [2020-12-22 10:28:31,820 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:28:31,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-22 10:28:31,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 134. [2020-12-22 10:28:31,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 10:28:31,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 341 transitions. [2020-12-22 10:28:31,827 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 341 transitions. Word has length 12 [2020-12-22 10:28:31,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:31,827 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 341 transitions. [2020-12-22 10:28:31,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:31,827 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 341 transitions. [2020-12-22 10:28:31,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:31,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:31,829 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:32,043 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:32,044 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:32,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:32,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1770477698, now seen corresponding path program 28 times [2020-12-22 10:28:32,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:32,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490656153] [2020-12-22 10:28:32,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:32,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:32,122 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:32,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490656153] [2020-12-22 10:28:32,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240603049] [2020-12-22 10:28:32,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:32,185 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:32,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:32,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:32,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:32,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:32,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:32,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:32,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021431986] [2020-12-22 10:28:32,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:32,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:32,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:32,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:32,338 INFO L87 Difference]: Start difference. First operand 134 states and 341 transitions. Second operand 14 states. [2020-12-22 10:28:32,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:32,545 INFO L93 Difference]: Finished difference Result 183 states and 438 transitions. [2020-12-22 10:28:32,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:28:32,545 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:28:32,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:32,547 INFO L225 Difference]: With dead ends: 183 [2020-12-22 10:28:32,547 INFO L226 Difference]: Without dead ends: 181 [2020-12-22 10:28:32,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:28:32,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-22 10:28:32,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 134. [2020-12-22 10:28:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 10:28:32,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 344 transitions. [2020-12-22 10:28:32,554 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 344 transitions. Word has length 12 [2020-12-22 10:28:32,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:32,554 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 344 transitions. [2020-12-22 10:28:32,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:32,554 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 344 transitions. [2020-12-22 10:28:32,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:32,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:32,555 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:32,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 10:28:32,769 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:32,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:32,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1770480581, now seen corresponding path program 29 times [2020-12-22 10:28:32,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:32,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045172610] [2020-12-22 10:28:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:32,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045172610] [2020-12-22 10:28:32,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064384774] [2020-12-22 10:28:32,839 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:32,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:32,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:32,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:32,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:33,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:33,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:33,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:33,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546976848] [2020-12-22 10:28:33,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:33,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:33,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:33,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:33,024 INFO L87 Difference]: Start difference. First operand 134 states and 344 transitions. Second operand 14 states. [2020-12-22 10:28:33,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:33,264 INFO L93 Difference]: Finished difference Result 180 states and 432 transitions. [2020-12-22 10:28:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:28:33,264 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:28:33,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:33,266 INFO L225 Difference]: With dead ends: 180 [2020-12-22 10:28:33,266 INFO L226 Difference]: Without dead ends: 178 [2020-12-22 10:28:33,267 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:28:33,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-22 10:28:33,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 134. [2020-12-22 10:28:33,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 10:28:33,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 343 transitions. [2020-12-22 10:28:33,272 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 343 transitions. Word has length 12 [2020-12-22 10:28:33,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:33,272 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 343 transitions. [2020-12-22 10:28:33,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:33,273 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 343 transitions. [2020-12-22 10:28:33,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:33,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:33,273 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:33,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:33,488 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:33,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:33,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1771083128, now seen corresponding path program 30 times [2020-12-22 10:28:33,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:33,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097112522] [2020-12-22 10:28:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:33,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:33,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097112522] [2020-12-22 10:28:33,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056377089] [2020-12-22 10:28:33,558 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:33,619 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:28:33,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:33,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:33,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:33,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:33,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:33,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426950885] [2020-12-22 10:28:33,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:33,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:33,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:33,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:33,731 INFO L87 Difference]: Start difference. First operand 134 states and 343 transitions. Second operand 14 states. [2020-12-22 10:28:34,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:34,024 INFO L93 Difference]: Finished difference Result 180 states and 435 transitions. [2020-12-22 10:28:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:28:34,025 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:28:34,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:34,027 INFO L225 Difference]: With dead ends: 180 [2020-12-22 10:28:34,027 INFO L226 Difference]: Without dead ends: 178 [2020-12-22 10:28:34,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=156, Invalid=350, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:28:34,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-22 10:28:34,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 137. [2020-12-22 10:28:34,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-22 10:28:34,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 355 transitions. [2020-12-22 10:28:34,033 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 355 transitions. Word has length 12 [2020-12-22 10:28:34,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:34,033 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 355 transitions. [2020-12-22 10:28:34,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:34,033 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 355 transitions. [2020-12-22 10:28:34,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:34,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:34,034 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:34,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-22 10:28:34,249 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:34,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:34,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1771105448, now seen corresponding path program 31 times [2020-12-22 10:28:34,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:34,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240183068] [2020-12-22 10:28:34,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:34,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:34,315 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:34,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240183068] [2020-12-22 10:28:34,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1734733995] [2020-12-22 10:28:34,316 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:34,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:34,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:34,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:34,483 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:28:34,485 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:28:34,486 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:34,495 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:34,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:34,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:28:34,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522827078] [2020-12-22 10:28:34,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:28:34,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:34,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:28:34,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:28:34,497 INFO L87 Difference]: Start difference. First operand 137 states and 355 transitions. Second operand 13 states. [2020-12-22 10:28:34,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:34,891 INFO L93 Difference]: Finished difference Result 198 states and 480 transitions. [2020-12-22 10:28:34,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:28:34,891 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:28:34,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:34,893 INFO L225 Difference]: With dead ends: 198 [2020-12-22 10:28:34,893 INFO L226 Difference]: Without dead ends: 190 [2020-12-22 10:28:34,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:28:34,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-22 10:28:34,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 134. [2020-12-22 10:28:34,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 10:28:34,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 343 transitions. [2020-12-22 10:28:34,898 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 343 transitions. Word has length 12 [2020-12-22 10:28:34,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:34,899 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 343 transitions. [2020-12-22 10:28:34,899 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:28:34,899 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 343 transitions. [2020-12-22 10:28:34,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:34,899 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:34,900 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:35,114 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 10:28:35,114 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:35,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1771172501, now seen corresponding path program 32 times [2020-12-22 10:28:35,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:35,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070361430] [2020-12-22 10:28:35,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:35,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:35,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:35,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070361430] [2020-12-22 10:28:35,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211647413] [2020-12-22 10:28:35,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:35,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:35,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:35,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:35,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:35,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:35,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:35,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-22 10:28:35,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269017631] [2020-12-22 10:28:35,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:28:35,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:35,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:28:35,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:28:35,359 INFO L87 Difference]: Start difference. First operand 134 states and 343 transitions. Second operand 14 states. [2020-12-22 10:28:35,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:35,644 INFO L93 Difference]: Finished difference Result 180 states and 433 transitions. [2020-12-22 10:28:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:28:35,645 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-22 10:28:35,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:35,647 INFO L225 Difference]: With dead ends: 180 [2020-12-22 10:28:35,647 INFO L226 Difference]: Without dead ends: 178 [2020-12-22 10:28:35,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:28:35,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-22 10:28:35,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-12-22 10:28:35,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-22 10:28:35,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 350 transitions. [2020-12-22 10:28:35,653 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 350 transitions. Word has length 12 [2020-12-22 10:28:35,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:35,653 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 350 transitions. [2020-12-22 10:28:35,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:28:35,653 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 350 transitions. [2020-12-22 10:28:35,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:28:35,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:35,654 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:35,867 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 10:28:35,868 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:35,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:35,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1771194821, now seen corresponding path program 33 times [2020-12-22 10:28:35,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:35,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660357513] [2020-12-22 10:28:35,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:35,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:35,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660357513] [2020-12-22 10:28:35,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373240209] [2020-12-22 10:28:35,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:36,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:28:36,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:36,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:28:36,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:36,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:36,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:36,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-22 10:28:36,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629618584] [2020-12-22 10:28:36,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:28:36,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:36,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:28:36,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:28:36,100 INFO L87 Difference]: Start difference. First operand 136 states and 350 transitions. Second operand 13 states. [2020-12-22 10:28:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:36,542 INFO L93 Difference]: Finished difference Result 198 states and 480 transitions. [2020-12-22 10:28:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:28:36,542 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-22 10:28:36,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:36,544 INFO L225 Difference]: With dead ends: 198 [2020-12-22 10:28:36,544 INFO L226 Difference]: Without dead ends: 190 [2020-12-22 10:28:36,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:28:36,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-22 10:28:36,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 134. [2020-12-22 10:28:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-22 10:28:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 342 transitions. [2020-12-22 10:28:36,549 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 342 transitions. Word has length 12 [2020-12-22 10:28:36,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:36,549 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 342 transitions. [2020-12-22 10:28:36,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:28:36,549 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 342 transitions. [2020-12-22 10:28:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:36,550 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:36,550 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:36,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-22 10:28:36,765 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:36,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:36,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1625739156, now seen corresponding path program 4 times [2020-12-22 10:28:36,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:36,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308682383] [2020-12-22 10:28:36,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:36,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:36,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308682383] [2020-12-22 10:28:36,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847702716] [2020-12-22 10:28:36,869 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:36,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:36,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:36,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:28:36,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:37,108 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:37,137 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:37,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:37,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:28:37,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672728361] [2020-12-22 10:28:37,138 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:28:37,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:37,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:28:37,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:28:37,139 INFO L87 Difference]: Start difference. First operand 134 states and 342 transitions. Second operand 18 states. [2020-12-22 10:28:37,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:37,381 INFO L93 Difference]: Finished difference Result 210 states and 508 transitions. [2020-12-22 10:28:37,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:28:37,381 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-12-22 10:28:37,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:37,383 INFO L225 Difference]: With dead ends: 210 [2020-12-22 10:28:37,383 INFO L226 Difference]: Without dead ends: 202 [2020-12-22 10:28:37,383 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:28:37,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-22 10:28:37,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 145. [2020-12-22 10:28:37,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-22 10:28:37,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 379 transitions. [2020-12-22 10:28:37,389 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 379 transitions. Word has length 13 [2020-12-22 10:28:37,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:37,389 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 379 transitions. [2020-12-22 10:28:37,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:28:37,390 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 379 transitions. [2020-12-22 10:28:37,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:37,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:37,390 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:37,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:37,605 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:37,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:37,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1942539904, now seen corresponding path program 34 times [2020-12-22 10:28:37,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:37,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773978248] [2020-12-22 10:28:37,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:37,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:37,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773978248] [2020-12-22 10:28:37,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710152058] [2020-12-22 10:28:37,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:37,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:37,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:37,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:37,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:37,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:37,920 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:37,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:37,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71665524] [2020-12-22 10:28:37,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:37,921 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:37,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:37,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:37,921 INFO L87 Difference]: Start difference. First operand 145 states and 379 transitions. Second operand 16 states. [2020-12-22 10:28:38,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:38,055 INFO L93 Difference]: Finished difference Result 177 states and 439 transitions. [2020-12-22 10:28:38,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:28:38,055 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:38,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:38,057 INFO L225 Difference]: With dead ends: 177 [2020-12-22 10:28:38,057 INFO L226 Difference]: Without dead ends: 175 [2020-12-22 10:28:38,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:28:38,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-22 10:28:38,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 152. [2020-12-22 10:28:38,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-22 10:28:38,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 394 transitions. [2020-12-22 10:28:38,061 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 394 transitions. Word has length 13 [2020-12-22 10:28:38,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:38,062 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 394 transitions. [2020-12-22 10:28:38,062 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:38,062 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 394 transitions. [2020-12-22 10:28:38,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:38,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:38,063 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:38,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-22 10:28:38,275 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:38,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:38,276 INFO L82 PathProgramCache]: Analyzing trace with hash 1942908184, now seen corresponding path program 35 times [2020-12-22 10:28:38,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:38,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638212527] [2020-12-22 10:28:38,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:38,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:38,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:38,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638212527] [2020-12-22 10:28:38,359 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429313557] [2020-12-22 10:28:38,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:38,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:28:38,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:38,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:38,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:38,585 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:28:38,588 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:28:38,590 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:38,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:38,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:38,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:38,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672217182] [2020-12-22 10:28:38,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:38,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:38,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:38,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:38,614 INFO L87 Difference]: Start difference. First operand 152 states and 394 transitions. Second operand 16 states. [2020-12-22 10:28:39,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:39,069 INFO L93 Difference]: Finished difference Result 240 states and 582 transitions. [2020-12-22 10:28:39,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:28:39,069 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:39,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:39,071 INFO L225 Difference]: With dead ends: 240 [2020-12-22 10:28:39,071 INFO L226 Difference]: Without dead ends: 228 [2020-12-22 10:28:39,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:28:39,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-12-22 10:28:39,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 144. [2020-12-22 10:28:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-22 10:28:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 383 transitions. [2020-12-22 10:28:39,076 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 383 transitions. Word has length 13 [2020-12-22 10:28:39,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:39,077 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 383 transitions. [2020-12-22 10:28:39,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:39,077 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 383 transitions. [2020-12-22 10:28:39,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:39,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:39,078 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:39,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:39,292 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:39,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:39,293 INFO L82 PathProgramCache]: Analyzing trace with hash -620144291, now seen corresponding path program 36 times [2020-12-22 10:28:39,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:39,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442710972] [2020-12-22 10:28:39,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:39,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:39,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442710972] [2020-12-22 10:28:39,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486003590] [2020-12-22 10:28:39,399 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:39,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:28:39,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:39,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:39,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:39,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:39,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:39,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:39,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999072437] [2020-12-22 10:28:39,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:39,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:39,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:39,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:39,662 INFO L87 Difference]: Start difference. First operand 144 states and 383 transitions. Second operand 16 states. [2020-12-22 10:28:39,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:39,937 INFO L93 Difference]: Finished difference Result 201 states and 492 transitions. [2020-12-22 10:28:39,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:28:39,938 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:39,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:39,940 INFO L225 Difference]: With dead ends: 201 [2020-12-22 10:28:39,940 INFO L226 Difference]: Without dead ends: 199 [2020-12-22 10:28:39,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:28:39,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-12-22 10:28:39,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 148. [2020-12-22 10:28:39,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-22 10:28:39,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 389 transitions. [2020-12-22 10:28:39,945 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 389 transitions. Word has length 13 [2020-12-22 10:28:39,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:39,945 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 389 transitions. [2020-12-22 10:28:39,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:39,945 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 389 transitions. [2020-12-22 10:28:39,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:39,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:39,946 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:40,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 10:28:40,161 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:40,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:40,162 INFO L82 PathProgramCache]: Analyzing trace with hash -266227211, now seen corresponding path program 37 times [2020-12-22 10:28:40,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:40,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454033705] [2020-12-22 10:28:40,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:40,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:40,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:40,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454033705] [2020-12-22 10:28:40,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [846034906] [2020-12-22 10:28:40,253 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:40,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:40,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:40,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:40,518 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:40,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:40,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:40,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098502356] [2020-12-22 10:28:40,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:40,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:40,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:40,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:40,523 INFO L87 Difference]: Start difference. First operand 148 states and 389 transitions. Second operand 16 states. [2020-12-22 10:28:40,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:40,860 INFO L93 Difference]: Finished difference Result 214 states and 515 transitions. [2020-12-22 10:28:40,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:28:40,861 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:40,863 INFO L225 Difference]: With dead ends: 214 [2020-12-22 10:28:40,863 INFO L226 Difference]: Without dead ends: 212 [2020-12-22 10:28:40,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:40,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-22 10:28:40,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 150. [2020-12-22 10:28:40,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-22 10:28:40,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 396 transitions. [2020-12-22 10:28:40,869 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 396 transitions. Word has length 13 [2020-12-22 10:28:40,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:40,869 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 396 transitions. [2020-12-22 10:28:40,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:40,869 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 396 transitions. [2020-12-22 10:28:40,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:40,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:40,870 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:41,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-22 10:28:41,084 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:41,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:41,085 INFO L82 PathProgramCache]: Analyzing trace with hash -265621781, now seen corresponding path program 38 times [2020-12-22 10:28:41,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:41,085 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299239319] [2020-12-22 10:28:41,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:41,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:41,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:41,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299239319] [2020-12-22 10:28:41,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481056443] [2020-12-22 10:28:41,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:41,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:41,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:41,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:41,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:41,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:41,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:41,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586351086] [2020-12-22 10:28:41,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:41,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:41,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:41,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:41,447 INFO L87 Difference]: Start difference. First operand 150 states and 396 transitions. Second operand 16 states. [2020-12-22 10:28:41,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:41,861 INFO L93 Difference]: Finished difference Result 211 states and 513 transitions. [2020-12-22 10:28:41,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:28:41,862 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:41,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:41,864 INFO L225 Difference]: With dead ends: 211 [2020-12-22 10:28:41,864 INFO L226 Difference]: Without dead ends: 209 [2020-12-22 10:28:41,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:28:41,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-22 10:28:41,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 153. [2020-12-22 10:28:41,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-22 10:28:41,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 408 transitions. [2020-12-22 10:28:41,870 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 408 transitions. Word has length 13 [2020-12-22 10:28:41,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:41,870 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 408 transitions. [2020-12-22 10:28:41,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:41,870 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 408 transitions. [2020-12-22 10:28:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:41,871 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:41,871 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:42,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:42,083 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:42,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:42,084 INFO L82 PathProgramCache]: Analyzing trace with hash -265602344, now seen corresponding path program 39 times [2020-12-22 10:28:42,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:42,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147273382] [2020-12-22 10:28:42,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:42,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:42,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:42,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147273382] [2020-12-22 10:28:42,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872742299] [2020-12-22 10:28:42,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:42,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:28:42,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:42,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:28:42,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:42,414 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:42,417 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:28:42,419 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:42,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:42,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:42,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:42,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465976471] [2020-12-22 10:28:42,441 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:42,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:42,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:42,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:42,442 INFO L87 Difference]: Start difference. First operand 153 states and 408 transitions. Second operand 16 states. [2020-12-22 10:28:43,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:43,094 INFO L93 Difference]: Finished difference Result 249 states and 604 transitions. [2020-12-22 10:28:43,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:28:43,094 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:43,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:43,096 INFO L225 Difference]: With dead ends: 249 [2020-12-22 10:28:43,096 INFO L226 Difference]: Without dead ends: 237 [2020-12-22 10:28:43,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=353, Invalid=769, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:28:43,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-22 10:28:43,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 148. [2020-12-22 10:28:43,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-22 10:28:43,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 399 transitions. [2020-12-22 10:28:43,102 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 399 transitions. Word has length 13 [2020-12-22 10:28:43,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:43,103 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 399 transitions. [2020-12-22 10:28:43,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:43,103 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 399 transitions. [2020-12-22 10:28:43,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:43,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:43,104 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:43,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-22 10:28:43,319 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:43,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:43,320 INFO L82 PathProgramCache]: Analyzing trace with hash -539778060, now seen corresponding path program 40 times [2020-12-22 10:28:43,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:43,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849912589] [2020-12-22 10:28:43,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:43,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:43,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849912589] [2020-12-22 10:28:43,412 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656121448] [2020-12-22 10:28:43,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:43,477 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:43,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:43,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:43,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:43,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:43,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:43,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:43,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508913183] [2020-12-22 10:28:43,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:43,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:43,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:43,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:43,640 INFO L87 Difference]: Start difference. First operand 148 states and 399 transitions. Second operand 16 states. [2020-12-22 10:28:43,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:43,955 INFO L93 Difference]: Finished difference Result 213 states and 526 transitions. [2020-12-22 10:28:43,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:28:43,956 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:43,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:43,958 INFO L225 Difference]: With dead ends: 213 [2020-12-22 10:28:43,958 INFO L226 Difference]: Without dead ends: 211 [2020-12-22 10:28:43,958 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:43,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-22 10:28:43,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 154. [2020-12-22 10:28:43,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-22 10:28:43,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 409 transitions. [2020-12-22 10:28:43,963 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 409 transitions. Word has length 13 [2020-12-22 10:28:43,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:43,963 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 409 transitions. [2020-12-22 10:28:43,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:43,963 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 409 transitions. [2020-12-22 10:28:43,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:43,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:43,964 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:44,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-22 10:28:44,180 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:44,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:44,180 INFO L82 PathProgramCache]: Analyzing trace with hash -539691570, now seen corresponding path program 41 times [2020-12-22 10:28:44,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:44,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337582192] [2020-12-22 10:28:44,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:44,291 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:44,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337582192] [2020-12-22 10:28:44,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071785609] [2020-12-22 10:28:44,291 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:44,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:28:44,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:44,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:44,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:44,525 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:44,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:44,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:44,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940666667] [2020-12-22 10:28:44,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:44,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:44,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:44,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:44,527 INFO L87 Difference]: Start difference. First operand 154 states and 409 transitions. Second operand 16 states. [2020-12-22 10:28:44,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:44,861 INFO L93 Difference]: Finished difference Result 206 states and 513 transitions. [2020-12-22 10:28:44,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:28:44,862 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:44,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:44,863 INFO L225 Difference]: With dead ends: 206 [2020-12-22 10:28:44,864 INFO L226 Difference]: Without dead ends: 204 [2020-12-22 10:28:44,864 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:44,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-12-22 10:28:44,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-12-22 10:28:44,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-22 10:28:44,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 409 transitions. [2020-12-22 10:28:44,869 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 409 transitions. Word has length 13 [2020-12-22 10:28:44,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:44,870 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 409 transitions. [2020-12-22 10:28:44,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:44,870 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 409 transitions. [2020-12-22 10:28:44,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:44,870 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:44,871 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:45,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 10:28:45,085 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:45,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:45,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1841716828, now seen corresponding path program 42 times [2020-12-22 10:28:45,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:45,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353398806] [2020-12-22 10:28:45,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:45,184 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:45,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353398806] [2020-12-22 10:28:45,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765267573] [2020-12-22 10:28:45,185 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:45,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:28:45,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:45,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:45,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:45,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:45,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:45,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:45,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744961685] [2020-12-22 10:28:45,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:45,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:45,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:45,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:45,413 INFO L87 Difference]: Start difference. First operand 154 states and 409 transitions. Second operand 16 states. [2020-12-22 10:28:45,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:45,735 INFO L93 Difference]: Finished difference Result 225 states and 550 transitions. [2020-12-22 10:28:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:28:45,736 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:45,739 INFO L225 Difference]: With dead ends: 225 [2020-12-22 10:28:45,739 INFO L226 Difference]: Without dead ends: 223 [2020-12-22 10:28:45,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:45,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-22 10:28:45,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 156. [2020-12-22 10:28:45,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-12-22 10:28:45,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 414 transitions. [2020-12-22 10:28:45,744 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 414 transitions. Word has length 13 [2020-12-22 10:28:45,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:45,744 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 414 transitions. [2020-12-22 10:28:45,744 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:45,745 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 414 transitions. [2020-12-22 10:28:45,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:45,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:45,745 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:45,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:45,959 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:45,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:45,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1841803318, now seen corresponding path program 43 times [2020-12-22 10:28:45,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:45,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320357621] [2020-12-22 10:28:45,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:45,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:46,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:46,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320357621] [2020-12-22 10:28:46,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326493972] [2020-12-22 10:28:46,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:46,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:46,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:46,286 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:46,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:46,287 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:46,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262647200] [2020-12-22 10:28:46,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:46,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:46,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:46,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:46,288 INFO L87 Difference]: Start difference. First operand 156 states and 414 transitions. Second operand 16 states. [2020-12-22 10:28:46,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:46,649 INFO L93 Difference]: Finished difference Result 215 states and 530 transitions. [2020-12-22 10:28:46,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:28:46,650 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:46,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:46,652 INFO L225 Difference]: With dead ends: 215 [2020-12-22 10:28:46,652 INFO L226 Difference]: Without dead ends: 213 [2020-12-22 10:28:46,652 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:46,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-22 10:28:46,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 155. [2020-12-22 10:28:46,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-22 10:28:46,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 411 transitions. [2020-12-22 10:28:46,658 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 411 transitions. Word has length 13 [2020-12-22 10:28:46,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:46,658 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 411 transitions. [2020-12-22 10:28:46,658 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:46,658 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 411 transitions. [2020-12-22 10:28:46,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:46,659 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:46,659 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:46,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:46,867 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:46,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:46,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1860485158, now seen corresponding path program 44 times [2020-12-22 10:28:46,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:46,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802953071] [2020-12-22 10:28:46,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:46,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:46,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:46,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802953071] [2020-12-22 10:28:46,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127643563] [2020-12-22 10:28:46,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:47,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:47,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:47,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:47,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:47,190 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:47,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:47,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:47,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844762185] [2020-12-22 10:28:47,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:47,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:47,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:47,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:47,192 INFO L87 Difference]: Start difference. First operand 155 states and 411 transitions. Second operand 16 states. [2020-12-22 10:28:47,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:47,656 INFO L93 Difference]: Finished difference Result 225 states and 543 transitions. [2020-12-22 10:28:47,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:28:47,657 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:47,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:47,658 INFO L225 Difference]: With dead ends: 225 [2020-12-22 10:28:47,658 INFO L226 Difference]: Without dead ends: 223 [2020-12-22 10:28:47,659 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:28:47,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-22 10:28:47,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 157. [2020-12-22 10:28:47,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 10:28:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 418 transitions. [2020-12-22 10:28:47,663 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 418 transitions. Word has length 13 [2020-12-22 10:28:47,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:47,663 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 418 transitions. [2020-12-22 10:28:47,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:47,663 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 418 transitions. [2020-12-22 10:28:47,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:47,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:47,664 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:47,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:47,865 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:47,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:47,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1861177078, now seen corresponding path program 45 times [2020-12-22 10:28:47,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:47,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824576009] [2020-12-22 10:28:47,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:47,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:47,959 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:47,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824576009] [2020-12-22 10:28:47,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417127898] [2020-12-22 10:28:47,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:48,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:28:48,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:48,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:48,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:48,162 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:48,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:48,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:48,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132433628] [2020-12-22 10:28:48,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:48,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:48,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:48,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:48,164 INFO L87 Difference]: Start difference. First operand 157 states and 418 transitions. Second operand 16 states. [2020-12-22 10:28:48,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:48,640 INFO L93 Difference]: Finished difference Result 226 states and 554 transitions. [2020-12-22 10:28:48,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:28:48,640 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:48,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:48,642 INFO L225 Difference]: With dead ends: 226 [2020-12-22 10:28:48,642 INFO L226 Difference]: Without dead ends: 224 [2020-12-22 10:28:48,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:28:48,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-22 10:28:48,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 160. [2020-12-22 10:28:48,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-22 10:28:48,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 430 transitions. [2020-12-22 10:28:48,647 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 430 transitions. Word has length 13 [2020-12-22 10:28:48,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:48,647 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 430 transitions. [2020-12-22 10:28:48,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:48,648 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 430 transitions. [2020-12-22 10:28:48,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:48,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:48,648 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:48,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:48,863 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:48,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:48,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1861199398, now seen corresponding path program 46 times [2020-12-22 10:28:48,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:48,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453044130] [2020-12-22 10:28:48,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:48,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453044130] [2020-12-22 10:28:48,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672374752] [2020-12-22 10:28:48,970 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:49,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:49,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:49,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:49,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:49,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:49,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:49,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:49,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384487181] [2020-12-22 10:28:49,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:49,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:49,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:49,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:49,172 INFO L87 Difference]: Start difference. First operand 160 states and 430 transitions. Second operand 16 states. [2020-12-22 10:28:49,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:49,993 INFO L93 Difference]: Finished difference Result 276 states and 671 transitions. [2020-12-22 10:28:49,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 10:28:49,995 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:49,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:49,997 INFO L225 Difference]: With dead ends: 276 [2020-12-22 10:28:49,997 INFO L226 Difference]: Without dead ends: 264 [2020-12-22 10:28:49,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=408, Invalid=998, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:28:49,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-22 10:28:50,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 154. [2020-12-22 10:28:50,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-22 10:28:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 412 transitions. [2020-12-22 10:28:50,003 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 412 transitions. Word has length 13 [2020-12-22 10:28:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:50,003 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 412 transitions. [2020-12-22 10:28:50,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 412 transitions. [2020-12-22 10:28:50,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:50,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:50,004 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:50,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-12-22 10:28:50,219 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:50,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:50,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1863252838, now seen corresponding path program 47 times [2020-12-22 10:28:50,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:50,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895882880] [2020-12-22 10:28:50,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:50,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:50,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895882880] [2020-12-22 10:28:50,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469534245] [2020-12-22 10:28:50,308 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:50,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:28:50,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:50,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:50,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:50,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:50,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:50,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:50,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366009540] [2020-12-22 10:28:50,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:50,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:50,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:50,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:50,532 INFO L87 Difference]: Start difference. First operand 154 states and 412 transitions. Second operand 16 states. [2020-12-22 10:28:51,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:51,024 INFO L93 Difference]: Finished difference Result 230 states and 561 transitions. [2020-12-22 10:28:51,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:28:51,025 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:51,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:51,027 INFO L225 Difference]: With dead ends: 230 [2020-12-22 10:28:51,027 INFO L226 Difference]: Without dead ends: 228 [2020-12-22 10:28:51,027 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:28:51,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-12-22 10:28:51,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2020-12-22 10:28:51,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-22 10:28:51,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 417 transitions. [2020-12-22 10:28:51,033 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 417 transitions. Word has length 13 [2020-12-22 10:28:51,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:51,033 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 417 transitions. [2020-12-22 10:28:51,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:51,033 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 417 transitions. [2020-12-22 10:28:51,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:51,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:51,034 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:51,248 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:51,249 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:51,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:51,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1863858268, now seen corresponding path program 48 times [2020-12-22 10:28:51,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:51,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078740723] [2020-12-22 10:28:51,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:51,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:51,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078740723] [2020-12-22 10:28:51,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110316452] [2020-12-22 10:28:51,338 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:51,428 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:28:51,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:51,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:51,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:51,579 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:51,579 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:51,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255473843] [2020-12-22 10:28:51,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:51,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:51,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:51,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:51,580 INFO L87 Difference]: Start difference. First operand 155 states and 417 transitions. Second operand 16 states. [2020-12-22 10:28:52,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:52,055 INFO L93 Difference]: Finished difference Result 222 states and 545 transitions. [2020-12-22 10:28:52,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:28:52,055 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:52,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:52,057 INFO L225 Difference]: With dead ends: 222 [2020-12-22 10:28:52,057 INFO L226 Difference]: Without dead ends: 220 [2020-12-22 10:28:52,057 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=527, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:28:52,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-22 10:28:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 157. [2020-12-22 10:28:52,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 10:28:52,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 424 transitions. [2020-12-22 10:28:52,061 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 424 transitions. Word has length 13 [2020-12-22 10:28:52,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:52,061 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 424 transitions. [2020-12-22 10:28:52,061 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:52,061 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 424 transitions. [2020-12-22 10:28:52,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:52,062 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:52,062 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:52,270 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-22 10:28:52,271 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:52,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:52,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1863877705, now seen corresponding path program 49 times [2020-12-22 10:28:52,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:52,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34717788] [2020-12-22 10:28:52,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:52,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:52,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:52,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34717788] [2020-12-22 10:28:52,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216066858] [2020-12-22 10:28:52,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:52,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:52,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:52,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:52,569 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:28:52,595 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:52,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:52,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:52,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124435040] [2020-12-22 10:28:52,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:52,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:52,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:52,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:52,597 INFO L87 Difference]: Start difference. First operand 157 states and 424 transitions. Second operand 16 states. [2020-12-22 10:28:53,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:53,456 INFO L93 Difference]: Finished difference Result 266 states and 648 transitions. [2020-12-22 10:28:53,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 10:28:53,457 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:53,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:53,458 INFO L225 Difference]: With dead ends: 266 [2020-12-22 10:28:53,459 INFO L226 Difference]: Without dead ends: 254 [2020-12-22 10:28:53,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:28:53,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-22 10:28:53,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 153. [2020-12-22 10:28:53,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-22 10:28:53,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 411 transitions. [2020-12-22 10:28:53,465 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 411 transitions. Word has length 13 [2020-12-22 10:28:53,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:53,465 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 411 transitions. [2020-12-22 10:28:53,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:53,466 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 411 transitions. [2020-12-22 10:28:53,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:53,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:53,466 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:53,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:53,681 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:53,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:53,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1951482845, now seen corresponding path program 50 times [2020-12-22 10:28:53,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:53,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483347459] [2020-12-22 10:28:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:53,772 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:53,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483347459] [2020-12-22 10:28:53,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247313340] [2020-12-22 10:28:53,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:53,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:53,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:53,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:53,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:53,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:53,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:53,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:53,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375065432] [2020-12-22 10:28:53,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:53,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:53,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:53,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:53,970 INFO L87 Difference]: Start difference. First operand 153 states and 411 transitions. Second operand 16 states. [2020-12-22 10:28:54,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:54,167 INFO L93 Difference]: Finished difference Result 202 states and 511 transitions. [2020-12-22 10:28:54,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:28:54,168 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:54,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:54,170 INFO L225 Difference]: With dead ends: 202 [2020-12-22 10:28:54,170 INFO L226 Difference]: Without dead ends: 200 [2020-12-22 10:28:54,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:28:54,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-22 10:28:54,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 155. [2020-12-22 10:28:54,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-22 10:28:54,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 416 transitions. [2020-12-22 10:28:54,177 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 416 transitions. Word has length 13 [2020-12-22 10:28:54,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:54,177 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 416 transitions. [2020-12-22 10:28:54,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:54,177 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 416 transitions. [2020-12-22 10:28:54,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:54,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:54,178 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:54,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-22 10:28:54,393 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:54,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:54,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1951485728, now seen corresponding path program 51 times [2020-12-22 10:28:54,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:54,394 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092253391] [2020-12-22 10:28:54,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:54,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:54,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:54,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092253391] [2020-12-22 10:28:54,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158505246] [2020-12-22 10:28:54,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:54,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:28:54,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:54,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:54,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:54,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:54,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:54,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:54,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893839565] [2020-12-22 10:28:54,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:54,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:54,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:54,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:54,705 INFO L87 Difference]: Start difference. First operand 155 states and 416 transitions. Second operand 16 states. [2020-12-22 10:28:54,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:54,972 INFO L93 Difference]: Finished difference Result 210 states and 528 transitions. [2020-12-22 10:28:54,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:28:54,973 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:54,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:54,975 INFO L225 Difference]: With dead ends: 210 [2020-12-22 10:28:54,975 INFO L226 Difference]: Without dead ends: 208 [2020-12-22 10:28:54,975 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=303, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:28:54,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-22 10:28:54,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 158. [2020-12-22 10:28:54,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-22 10:28:54,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 424 transitions. [2020-12-22 10:28:54,979 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 424 transitions. Word has length 13 [2020-12-22 10:28:54,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:54,979 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 424 transitions. [2020-12-22 10:28:54,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:54,980 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 424 transitions. [2020-12-22 10:28:54,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:54,980 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:54,981 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:55,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:55,194 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:55,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:55,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1951572218, now seen corresponding path program 52 times [2020-12-22 10:28:55,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:55,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1627200779] [2020-12-22 10:28:55,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:55,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:55,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:55,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1627200779] [2020-12-22 10:28:55,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837619891] [2020-12-22 10:28:55,298 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:55,371 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:28:55,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:55,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:55,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:55,521 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:55,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:55,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:55,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549135537] [2020-12-22 10:28:55,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:55,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:55,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:55,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:55,524 INFO L87 Difference]: Start difference. First operand 158 states and 424 transitions. Second operand 16 states. [2020-12-22 10:28:55,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:55,750 INFO L93 Difference]: Finished difference Result 208 states and 524 transitions. [2020-12-22 10:28:55,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:28:55,751 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:55,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:55,753 INFO L225 Difference]: With dead ends: 208 [2020-12-22 10:28:55,753 INFO L226 Difference]: Without dead ends: 206 [2020-12-22 10:28:55,753 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:28:55,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-22 10:28:55,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 159. [2020-12-22 10:28:55,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-22 10:28:55,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 426 transitions. [2020-12-22 10:28:55,758 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 426 transitions. Word has length 13 [2020-12-22 10:28:55,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:55,759 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 426 transitions. [2020-12-22 10:28:55,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:55,759 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 426 transitions. [2020-12-22 10:28:55,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:55,760 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:55,760 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:55,973 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:55,974 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:55,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:55,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1531586955, now seen corresponding path program 53 times [2020-12-22 10:28:55,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:55,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535800633] [2020-12-22 10:28:55,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:56,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:56,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535800633] [2020-12-22 10:28:56,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040270149] [2020-12-22 10:28:56,063 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:56,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:28:56,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:56,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:56,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:56,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:56,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:56,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160317395] [2020-12-22 10:28:56,277 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:56,277 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:56,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:56,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:56,278 INFO L87 Difference]: Start difference. First operand 159 states and 426 transitions. Second operand 16 states. [2020-12-22 10:28:56,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:56,520 INFO L93 Difference]: Finished difference Result 217 states and 541 transitions. [2020-12-22 10:28:56,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:28:56,520 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:56,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:56,524 INFO L225 Difference]: With dead ends: 217 [2020-12-22 10:28:56,524 INFO L226 Difference]: Without dead ends: 215 [2020-12-22 10:28:56,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:28:56,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-22 10:28:56,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 159. [2020-12-22 10:28:56,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-22 10:28:56,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 426 transitions. [2020-12-22 10:28:56,528 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 426 transitions. Word has length 13 [2020-12-22 10:28:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:56,529 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 426 transitions. [2020-12-22 10:28:56,529 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:56,529 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 426 transitions. [2020-12-22 10:28:56,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:56,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:56,530 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:56,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-22 10:28:56,736 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:56,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:56,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1531584072, now seen corresponding path program 54 times [2020-12-22 10:28:56,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:56,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428188626] [2020-12-22 10:28:56,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:56,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:56,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428188626] [2020-12-22 10:28:56,828 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966488093] [2020-12-22 10:28:56,828 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:56,905 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:28:56,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:56,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:56,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:57,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:57,096 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:57,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:57,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052930698] [2020-12-22 10:28:57,097 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:57,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:57,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:57,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:57,098 INFO L87 Difference]: Start difference. First operand 159 states and 426 transitions. Second operand 16 states. [2020-12-22 10:28:57,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:57,479 INFO L93 Difference]: Finished difference Result 227 states and 562 transitions. [2020-12-22 10:28:57,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:28:57,479 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:57,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:57,481 INFO L225 Difference]: With dead ends: 227 [2020-12-22 10:28:57,482 INFO L226 Difference]: Without dead ends: 225 [2020-12-22 10:28:57,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:57,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-22 10:28:57,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 161. [2020-12-22 10:28:57,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-22 10:28:57,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 431 transitions. [2020-12-22 10:28:57,487 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 431 transitions. Word has length 13 [2020-12-22 10:28:57,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:57,488 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 431 transitions. [2020-12-22 10:28:57,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:57,488 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 431 transitions. [2020-12-22 10:28:57,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:57,489 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:57,489 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:57,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:57,705 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:57,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:57,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1531497582, now seen corresponding path program 55 times [2020-12-22 10:28:57,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:57,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014051331] [2020-12-22 10:28:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:57,797 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:57,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014051331] [2020-12-22 10:28:57,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904015041] [2020-12-22 10:28:57,797 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:57,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:57,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:58,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:58,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:58,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265085081] [2020-12-22 10:28:58,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:58,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:58,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:58,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:58,008 INFO L87 Difference]: Start difference. First operand 161 states and 431 transitions. Second operand 16 states. [2020-12-22 10:28:58,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:58,312 INFO L93 Difference]: Finished difference Result 221 states and 550 transitions. [2020-12-22 10:28:58,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:28:58,313 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:58,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:58,315 INFO L225 Difference]: With dead ends: 221 [2020-12-22 10:28:58,315 INFO L226 Difference]: Without dead ends: 219 [2020-12-22 10:28:58,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:28:58,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-22 10:28:58,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 157. [2020-12-22 10:28:58,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 10:28:58,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 421 transitions. [2020-12-22 10:28:58,318 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 421 transitions. Word has length 13 [2020-12-22 10:28:58,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:58,319 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 421 transitions. [2020-12-22 10:28:58,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:58,319 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 421 transitions. [2020-12-22 10:28:58,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:58,320 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:58,320 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:58,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:58,533 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:58,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:58,534 INFO L82 PathProgramCache]: Analyzing trace with hash -949768725, now seen corresponding path program 56 times [2020-12-22 10:28:58,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:58,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585125552] [2020-12-22 10:28:58,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:58,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:58,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585125552] [2020-12-22 10:28:58,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903351356] [2020-12-22 10:28:58,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:58,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:28:58,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:58,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:58,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:58,877 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:58,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:58,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:58,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530102599] [2020-12-22 10:28:58,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:58,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:58,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:58,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:58,879 INFO L87 Difference]: Start difference. First operand 157 states and 421 transitions. Second operand 16 states. [2020-12-22 10:28:59,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:28:59,164 INFO L93 Difference]: Finished difference Result 215 states and 535 transitions. [2020-12-22 10:28:59,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:28:59,165 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:28:59,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:28:59,166 INFO L225 Difference]: With dead ends: 215 [2020-12-22 10:28:59,166 INFO L226 Difference]: Without dead ends: 213 [2020-12-22 10:28:59,166 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:28:59,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-22 10:28:59,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 157. [2020-12-22 10:28:59,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 10:28:59,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 421 transitions. [2020-12-22 10:28:59,171 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 421 transitions. Word has length 13 [2020-12-22 10:28:59,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:28:59,171 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 421 transitions. [2020-12-22 10:28:59,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:28:59,171 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 421 transitions. [2020-12-22 10:28:59,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:28:59,172 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:28:59,172 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:28:59,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-22 10:28:59,385 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:28:59,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:28:59,386 INFO L82 PathProgramCache]: Analyzing trace with hash -949765842, now seen corresponding path program 57 times [2020-12-22 10:28:59,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:28:59,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902193415] [2020-12-22 10:28:59,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:28:59,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:28:59,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:59,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902193415] [2020-12-22 10:28:59,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816719374] [2020-12-22 10:28:59,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:28:59,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:28:59,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:28:59,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:28:59,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:28:59,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:28:59,712 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:28:59,712 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:28:59,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961972955] [2020-12-22 10:28:59,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:28:59,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:28:59,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:28:59,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:28:59,713 INFO L87 Difference]: Start difference. First operand 157 states and 421 transitions. Second operand 16 states. [2020-12-22 10:29:00,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:00,065 INFO L93 Difference]: Finished difference Result 230 states and 563 transitions. [2020-12-22 10:29:00,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:29:00,066 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:00,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:00,068 INFO L225 Difference]: With dead ends: 230 [2020-12-22 10:29:00,068 INFO L226 Difference]: Without dead ends: 228 [2020-12-22 10:29:00,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:29:00,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-12-22 10:29:00,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 157. [2020-12-22 10:29:00,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 10:29:00,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 421 transitions. [2020-12-22 10:29:00,072 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 421 transitions. Word has length 13 [2020-12-22 10:29:00,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:00,072 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 421 transitions. [2020-12-22 10:29:00,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:00,072 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 421 transitions. [2020-12-22 10:29:00,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:00,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:00,073 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:00,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:00,288 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:00,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:00,288 INFO L82 PathProgramCache]: Analyzing trace with hash -949679352, now seen corresponding path program 58 times [2020-12-22 10:29:00,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:00,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812660384] [2020-12-22 10:29:00,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:00,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:00,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:00,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812660384] [2020-12-22 10:29:00,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571193662] [2020-12-22 10:29:00,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:00,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:00,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:00,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:00,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:00,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:00,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:00,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:00,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200640721] [2020-12-22 10:29:00,625 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:00,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:00,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:00,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:00,626 INFO L87 Difference]: Start difference. First operand 157 states and 421 transitions. Second operand 16 states. [2020-12-22 10:29:00,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:00,950 INFO L93 Difference]: Finished difference Result 228 states and 560 transitions. [2020-12-22 10:29:00,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:29:00,951 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:00,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:00,953 INFO L225 Difference]: With dead ends: 228 [2020-12-22 10:29:00,953 INFO L226 Difference]: Without dead ends: 226 [2020-12-22 10:29:00,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:29:00,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-22 10:29:00,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 155. [2020-12-22 10:29:00,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-22 10:29:00,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 416 transitions. [2020-12-22 10:29:00,960 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 416 transitions. Word has length 13 [2020-12-22 10:29:00,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:00,961 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 416 transitions. [2020-12-22 10:29:00,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:00,961 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 416 transitions. [2020-12-22 10:29:00,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:00,962 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:00,962 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:01,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-12-22 10:29:01,177 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:01,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:01,177 INFO L82 PathProgramCache]: Analyzing trace with hash -931000395, now seen corresponding path program 59 times [2020-12-22 10:29:01,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:01,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832024794] [2020-12-22 10:29:01,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:01,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:01,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:01,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832024794] [2020-12-22 10:29:01,262 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344578579] [2020-12-22 10:29:01,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:01,327 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:01,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:01,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:01,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:01,486 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:01,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:01,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:01,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481644669] [2020-12-22 10:29:01,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:01,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:01,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:01,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:01,488 INFO L87 Difference]: Start difference. First operand 155 states and 416 transitions. Second operand 16 states. [2020-12-22 10:29:01,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:01,806 INFO L93 Difference]: Finished difference Result 226 states and 552 transitions. [2020-12-22 10:29:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:29:01,807 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:01,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:01,809 INFO L225 Difference]: With dead ends: 226 [2020-12-22 10:29:01,809 INFO L226 Difference]: Without dead ends: 224 [2020-12-22 10:29:01,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:29:01,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-22 10:29:01,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 155. [2020-12-22 10:29:01,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-22 10:29:01,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 416 transitions. [2020-12-22 10:29:01,813 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 416 transitions. Word has length 13 [2020-12-22 10:29:01,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:01,814 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 416 transitions. [2020-12-22 10:29:01,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:01,814 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 416 transitions. [2020-12-22 10:29:01,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:01,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:01,815 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:02,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-22 10:29:02,030 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:02,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:02,031 INFO L82 PathProgramCache]: Analyzing trace with hash -930997512, now seen corresponding path program 60 times [2020-12-22 10:29:02,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:02,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546245186] [2020-12-22 10:29:02,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:02,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:02,115 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:02,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546245186] [2020-12-22 10:29:02,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502787062] [2020-12-22 10:29:02,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:02,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:02,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:02,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:02,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:02,341 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:02,341 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:02,341 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:02,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982544756] [2020-12-22 10:29:02,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:02,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:02,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:02,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:02,343 INFO L87 Difference]: Start difference. First operand 155 states and 416 transitions. Second operand 16 states. [2020-12-22 10:29:02,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:02,820 INFO L93 Difference]: Finished difference Result 240 states and 583 transitions. [2020-12-22 10:29:02,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:29:02,820 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:02,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:02,822 INFO L225 Difference]: With dead ends: 240 [2020-12-22 10:29:02,822 INFO L226 Difference]: Without dead ends: 238 [2020-12-22 10:29:02,823 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=537, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:29:02,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-22 10:29:02,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 157. [2020-12-22 10:29:02,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-22 10:29:02,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 423 transitions. [2020-12-22 10:29:02,826 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 423 transitions. Word has length 13 [2020-12-22 10:29:02,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:02,827 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 423 transitions. [2020-12-22 10:29:02,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:02,827 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 423 transitions. [2020-12-22 10:29:02,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:02,827 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:02,827 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:03,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-22 10:29:03,038 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:03,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:03,039 INFO L82 PathProgramCache]: Analyzing trace with hash -930394965, now seen corresponding path program 61 times [2020-12-22 10:29:03,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:03,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796062372] [2020-12-22 10:29:03,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:03,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:03,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796062372] [2020-12-22 10:29:03,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586799725] [2020-12-22 10:29:03,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:03,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:03,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:03,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:03,351 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:03,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:03,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:03,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676916974] [2020-12-22 10:29:03,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:03,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:03,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:03,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:03,353 INFO L87 Difference]: Start difference. First operand 157 states and 423 transitions. Second operand 16 states. [2020-12-22 10:29:03,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:03,749 INFO L93 Difference]: Finished difference Result 222 states and 545 transitions. [2020-12-22 10:29:03,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:29:03,750 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:03,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:03,752 INFO L225 Difference]: With dead ends: 222 [2020-12-22 10:29:03,752 INFO L226 Difference]: Without dead ends: 220 [2020-12-22 10:29:03,752 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:29:03,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-22 10:29:03,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 159. [2020-12-22 10:29:03,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-22 10:29:03,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 430 transitions. [2020-12-22 10:29:03,756 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 430 transitions. Word has length 13 [2020-12-22 10:29:03,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:03,756 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 430 transitions. [2020-12-22 10:29:03,756 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:03,756 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 430 transitions. [2020-12-22 10:29:03,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:03,756 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:03,756 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:03,957 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:03,957 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:03,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:03,958 INFO L82 PathProgramCache]: Analyzing trace with hash -930375528, now seen corresponding path program 62 times [2020-12-22 10:29:03,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:03,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82685778] [2020-12-22 10:29:03,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:03,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:04,068 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:04,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82685778] [2020-12-22 10:29:04,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530358740] [2020-12-22 10:29:04,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:04,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:04,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:04,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:04,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:04,245 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:04,266 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:04,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:04,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:04,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005719479] [2020-12-22 10:29:04,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:04,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:04,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:04,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:04,268 INFO L87 Difference]: Start difference. First operand 159 states and 430 transitions. Second operand 16 states. [2020-12-22 10:29:04,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:04,778 INFO L93 Difference]: Finished difference Result 264 states and 639 transitions. [2020-12-22 10:29:04,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:29:04,779 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:04,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:04,781 INFO L225 Difference]: With dead ends: 264 [2020-12-22 10:29:04,781 INFO L226 Difference]: Without dead ends: 252 [2020-12-22 10:29:04,782 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:29:04,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-22 10:29:04,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 159. [2020-12-22 10:29:04,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-22 10:29:04,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 427 transitions. [2020-12-22 10:29:04,786 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 427 transitions. Word has length 13 [2020-12-22 10:29:04,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:04,786 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 427 transitions. [2020-12-22 10:29:04,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:04,786 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 427 transitions. [2020-12-22 10:29:04,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:04,787 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:04,787 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:05,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:05,001 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:05,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:05,002 INFO L82 PathProgramCache]: Analyzing trace with hash -930305592, now seen corresponding path program 63 times [2020-12-22 10:29:05,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:05,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85399308] [2020-12-22 10:29:05,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:05,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:05,113 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:05,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85399308] [2020-12-22 10:29:05,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790888162] [2020-12-22 10:29:05,114 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:05,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:05,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:05,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:29:05,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:05,332 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:05,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:05,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-12-22 10:29:05,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369656444] [2020-12-22 10:29:05,333 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:29:05,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:05,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:29:05,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:29:05,334 INFO L87 Difference]: Start difference. First operand 159 states and 427 transitions. Second operand 15 states. [2020-12-22 10:29:06,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:06,068 INFO L93 Difference]: Finished difference Result 266 states and 648 transitions. [2020-12-22 10:29:06,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 10:29:06,071 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-12-22 10:29:06,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:06,073 INFO L225 Difference]: With dead ends: 266 [2020-12-22 10:29:06,073 INFO L226 Difference]: Without dead ends: 262 [2020-12-22 10:29:06,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=267, Invalid=789, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:29:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-22 10:29:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 162. [2020-12-22 10:29:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-22 10:29:06,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 439 transitions. [2020-12-22 10:29:06,077 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 439 transitions. Word has length 13 [2020-12-22 10:29:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:06,077 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 439 transitions. [2020-12-22 10:29:06,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:29:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 439 transitions. [2020-12-22 10:29:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:06,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:06,078 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:06,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:06,289 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:06,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:06,290 INFO L82 PathProgramCache]: Analyzing trace with hash -930283272, now seen corresponding path program 64 times [2020-12-22 10:29:06,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:06,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439047173] [2020-12-22 10:29:06,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:06,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:06,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439047173] [2020-12-22 10:29:06,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356989773] [2020-12-22 10:29:06,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:06,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:06,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:06,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:06,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:06,604 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:06,607 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:29:06,609 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:06,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:06,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:06,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:06,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260839152] [2020-12-22 10:29:06,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:06,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:06,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:06,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:06,636 INFO L87 Difference]: Start difference. First operand 162 states and 439 transitions. Second operand 16 states. [2020-12-22 10:29:07,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:07,566 INFO L93 Difference]: Finished difference Result 303 states and 727 transitions. [2020-12-22 10:29:07,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 10:29:07,566 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:07,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:07,569 INFO L225 Difference]: With dead ends: 303 [2020-12-22 10:29:07,569 INFO L226 Difference]: Without dead ends: 291 [2020-12-22 10:29:07,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:29:07,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-22 10:29:07,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 159. [2020-12-22 10:29:07,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-22 10:29:07,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 428 transitions. [2020-12-22 10:29:07,574 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 428 transitions. Word has length 13 [2020-12-22 10:29:07,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:07,574 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 428 transitions. [2020-12-22 10:29:07,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:07,574 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 428 transitions. [2020-12-22 10:29:07,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:07,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:07,575 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:07,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:07,790 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:07,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:07,791 INFO L82 PathProgramCache]: Analyzing trace with hash -928229832, now seen corresponding path program 65 times [2020-12-22 10:29:07,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:07,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316437792] [2020-12-22 10:29:07,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:07,885 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:07,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316437792] [2020-12-22 10:29:07,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775330929] [2020-12-22 10:29:07,885 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:07,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:07,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:07,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:07,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:08,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:08,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:08,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:08,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603990379] [2020-12-22 10:29:08,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:08,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:08,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:08,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:08,093 INFO L87 Difference]: Start difference. First operand 159 states and 428 transitions. Second operand 16 states. [2020-12-22 10:29:08,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:08,506 INFO L93 Difference]: Finished difference Result 246 states and 601 transitions. [2020-12-22 10:29:08,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:29:08,507 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:08,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:08,509 INFO L225 Difference]: With dead ends: 246 [2020-12-22 10:29:08,509 INFO L226 Difference]: Without dead ends: 244 [2020-12-22 10:29:08,510 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:29:08,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-22 10:29:08,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 159. [2020-12-22 10:29:08,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-22 10:29:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 431 transitions. [2020-12-22 10:29:08,513 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 431 transitions. Word has length 13 [2020-12-22 10:29:08,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:08,513 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 431 transitions. [2020-12-22 10:29:08,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:08,513 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 431 transitions. [2020-12-22 10:29:08,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:08,514 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:08,514 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:08,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-12-22 10:29:08,719 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:08,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:08,720 INFO L82 PathProgramCache]: Analyzing trace with hash -927624402, now seen corresponding path program 66 times [2020-12-22 10:29:08,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:08,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42850879] [2020-12-22 10:29:08,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:08,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:08,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:08,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42850879] [2020-12-22 10:29:08,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970036063] [2020-12-22 10:29:08,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:08,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:08,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:08,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:08,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:09,037 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:09,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:09,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:09,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359204831] [2020-12-22 10:29:09,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:09,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:09,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:09,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:09,039 INFO L87 Difference]: Start difference. First operand 159 states and 431 transitions. Second operand 16 states. [2020-12-22 10:29:09,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:09,576 INFO L93 Difference]: Finished difference Result 243 states and 596 transitions. [2020-12-22 10:29:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:29:09,577 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:09,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:09,579 INFO L225 Difference]: With dead ends: 243 [2020-12-22 10:29:09,579 INFO L226 Difference]: Without dead ends: 241 [2020-12-22 10:29:09,579 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:29:09,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-22 10:29:09,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 161. [2020-12-22 10:29:09,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-22 10:29:09,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 438 transitions. [2020-12-22 10:29:09,584 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 438 transitions. Word has length 13 [2020-12-22 10:29:09,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:09,584 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 438 transitions. [2020-12-22 10:29:09,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:09,584 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 438 transitions. [2020-12-22 10:29:09,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:09,585 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:09,585 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:09,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:09,787 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:09,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:09,787 INFO L82 PathProgramCache]: Analyzing trace with hash -927604965, now seen corresponding path program 67 times [2020-12-22 10:29:09,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:09,788 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51311948] [2020-12-22 10:29:09,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:09,878 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51311948] [2020-12-22 10:29:09,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624226463] [2020-12-22 10:29:09,879 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:09,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:29:09,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:10,063 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:10,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:10,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:10,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-22 10:29:10,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611250817] [2020-12-22 10:29:10,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:10,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:10,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:10,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:10,092 INFO L87 Difference]: Start difference. First operand 161 states and 438 transitions. Second operand 16 states. [2020-12-22 10:29:10,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:10,853 INFO L93 Difference]: Finished difference Result 291 states and 706 transitions. [2020-12-22 10:29:10,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-22 10:29:10,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-22 10:29:10,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:10,856 INFO L225 Difference]: With dead ends: 291 [2020-12-22 10:29:10,857 INFO L226 Difference]: Without dead ends: 279 [2020-12-22 10:29:10,857 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=998, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:29:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-22 10:29:10,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 158. [2020-12-22 10:29:10,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-22 10:29:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 426 transitions. [2020-12-22 10:29:10,862 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 426 transitions. Word has length 13 [2020-12-22 10:29:10,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:10,863 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 426 transitions. [2020-12-22 10:29:10,863 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:10,863 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 426 transitions. [2020-12-22 10:29:10,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:10,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:10,864 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:11,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:11,078 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:11,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:11,078 INFO L82 PathProgramCache]: Analyzing trace with hash -841628139, now seen corresponding path program 68 times [2020-12-22 10:29:11,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:11,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18062472] [2020-12-22 10:29:11,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:11,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:11,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18062472] [2020-12-22 10:29:11,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081323151] [2020-12-22 10:29:11,171 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:11,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:11,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:11,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:29:11,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:11,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:11,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:11,293 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-22 10:29:11,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775218874] [2020-12-22 10:29:11,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:29:11,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:11,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:29:11,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:29:11,294 INFO L87 Difference]: Start difference. First operand 158 states and 426 transitions. Second operand 12 states. [2020-12-22 10:29:11,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:11,572 INFO L93 Difference]: Finished difference Result 268 states and 657 transitions. [2020-12-22 10:29:11,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:29:11,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2020-12-22 10:29:11,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:11,576 INFO L225 Difference]: With dead ends: 268 [2020-12-22 10:29:11,576 INFO L226 Difference]: Without dead ends: 256 [2020-12-22 10:29:11,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=123, Invalid=257, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:29:11,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-22 10:29:11,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 158. [2020-12-22 10:29:11,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-22 10:29:11,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 424 transitions. [2020-12-22 10:29:11,581 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 424 transitions. Word has length 13 [2020-12-22 10:29:11,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:11,582 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 424 transitions. [2020-12-22 10:29:11,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:29:11,582 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 424 transitions. [2020-12-22 10:29:11,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:11,582 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:11,582 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:11,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:11,783 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:11,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:11,784 INFO L82 PathProgramCache]: Analyzing trace with hash 864112436, now seen corresponding path program 15 times [2020-12-22 10:29:11,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:11,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [122697233] [2020-12-22 10:29:11,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:11,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:11,909 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:11,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [122697233] [2020-12-22 10:29:11,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425391641] [2020-12-22 10:29:11,909 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:11,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 10:29:11,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:11,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:11,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:12,164 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:12,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:12,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:12,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095350830] [2020-12-22 10:29:12,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:12,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:12,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:12,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:12,166 INFO L87 Difference]: Start difference. First operand 158 states and 424 transitions. Second operand 17 states. [2020-12-22 10:29:12,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:12,225 INFO L93 Difference]: Finished difference Result 203 states and 520 transitions. [2020-12-22 10:29:12,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:29:12,226 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-22 10:29:12,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:12,228 INFO L225 Difference]: With dead ends: 203 [2020-12-22 10:29:12,228 INFO L226 Difference]: Without dead ends: 200 [2020-12-22 10:29:12,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:12,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-22 10:29:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2020-12-22 10:29:12,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-22 10:29:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 444 transitions. [2020-12-22 10:29:12,233 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 444 transitions. Word has length 13 [2020-12-22 10:29:12,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:12,233 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 444 transitions. [2020-12-22 10:29:12,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:12,233 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 444 transitions. [2020-12-22 10:29:12,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:12,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:12,233 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:12,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:12,434 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:12,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:12,435 INFO L82 PathProgramCache]: Analyzing trace with hash 263131036, now seen corresponding path program 16 times [2020-12-22 10:29:12,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:12,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963586244] [2020-12-22 10:29:12,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:12,552 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:12,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963586244] [2020-12-22 10:29:12,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802994569] [2020-12-22 10:29:12,553 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:12,614 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:12,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:12,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:12,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:12,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:12,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:12,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580520507] [2020-12-22 10:29:12,802 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:12,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:12,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:12,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:12,803 INFO L87 Difference]: Start difference. First operand 167 states and 444 transitions. Second operand 17 states. [2020-12-22 10:29:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:12,910 INFO L93 Difference]: Finished difference Result 219 states and 550 transitions. [2020-12-22 10:29:12,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:29:12,911 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-22 10:29:12,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:12,913 INFO L225 Difference]: With dead ends: 219 [2020-12-22 10:29:12,913 INFO L226 Difference]: Without dead ends: 216 [2020-12-22 10:29:12,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:29:12,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-22 10:29:12,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-12-22 10:29:12,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-22 10:29:12,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 441 transitions. [2020-12-22 10:29:12,917 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 441 transitions. Word has length 13 [2020-12-22 10:29:12,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:12,917 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 441 transitions. [2020-12-22 10:29:12,917 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:12,917 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 441 transitions. [2020-12-22 10:29:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:12,918 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:12,918 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:13,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-12-22 10:29:13,119 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:13,120 INFO L82 PathProgramCache]: Analyzing trace with hash -598716724, now seen corresponding path program 17 times [2020-12-22 10:29:13,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:13,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348490881] [2020-12-22 10:29:13,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:13,233 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:13,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348490881] [2020-12-22 10:29:13,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765698043] [2020-12-22 10:29:13,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:13,296 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 10:29:13,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:13,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:13,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:13,468 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:13,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:13,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:13,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166994149] [2020-12-22 10:29:13,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:13,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:13,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:13,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:13,471 INFO L87 Difference]: Start difference. First operand 166 states and 441 transitions. Second operand 17 states. [2020-12-22 10:29:13,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:13,587 INFO L93 Difference]: Finished difference Result 216 states and 542 transitions. [2020-12-22 10:29:13,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:29:13,588 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-22 10:29:13,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:13,590 INFO L225 Difference]: With dead ends: 216 [2020-12-22 10:29:13,590 INFO L226 Difference]: Without dead ends: 213 [2020-12-22 10:29:13,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:29:13,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-22 10:29:13,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 165. [2020-12-22 10:29:13,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-22 10:29:13,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 438 transitions. [2020-12-22 10:29:13,596 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 438 transitions. Word has length 13 [2020-12-22 10:29:13,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:13,596 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 438 transitions. [2020-12-22 10:29:13,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 438 transitions. [2020-12-22 10:29:13,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:13,597 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:13,597 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:13,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-12-22 10:29:13,811 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:13,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:13,811 INFO L82 PathProgramCache]: Analyzing trace with hash 66218396, now seen corresponding path program 18 times [2020-12-22 10:29:13,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:13,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271349200] [2020-12-22 10:29:13,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:13,920 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:13,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271349200] [2020-12-22 10:29:13,920 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [870209708] [2020-12-22 10:29:13,920 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:13,983 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 10:29:13,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:13,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:13,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:14,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:14,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:14,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478251021] [2020-12-22 10:29:14,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:14,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:14,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:14,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:14,160 INFO L87 Difference]: Start difference. First operand 165 states and 438 transitions. Second operand 17 states. [2020-12-22 10:29:14,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:14,295 INFO L93 Difference]: Finished difference Result 214 states and 535 transitions. [2020-12-22 10:29:14,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:29:14,295 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-22 10:29:14,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:14,297 INFO L225 Difference]: With dead ends: 214 [2020-12-22 10:29:14,297 INFO L226 Difference]: Without dead ends: 211 [2020-12-22 10:29:14,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:29:14,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-22 10:29:14,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 164. [2020-12-22 10:29:14,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-22 10:29:14,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 435 transitions. [2020-12-22 10:29:14,302 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 435 transitions. Word has length 13 [2020-12-22 10:29:14,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:14,302 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 435 transitions. [2020-12-22 10:29:14,302 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:14,302 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 435 transitions. [2020-12-22 10:29:14,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:14,303 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:14,303 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:14,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:14,516 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:14,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:14,517 INFO L82 PathProgramCache]: Analyzing trace with hash 87667916, now seen corresponding path program 19 times [2020-12-22 10:29:14,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:14,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759491081] [2020-12-22 10:29:14,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:14,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759491081] [2020-12-22 10:29:14,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963494645] [2020-12-22 10:29:14,622 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:14,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:14,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:14,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:14,886 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:14,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:14,887 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:14,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484519386] [2020-12-22 10:29:14,887 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:14,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:14,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:14,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:14,888 INFO L87 Difference]: Start difference. First operand 164 states and 435 transitions. Second operand 17 states. [2020-12-22 10:29:15,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:15,096 INFO L93 Difference]: Finished difference Result 213 states and 535 transitions. [2020-12-22 10:29:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:29:15,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-22 10:29:15,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:15,098 INFO L225 Difference]: With dead ends: 213 [2020-12-22 10:29:15,098 INFO L226 Difference]: Without dead ends: 210 [2020-12-22 10:29:15,098 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:29:15,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-22 10:29:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2020-12-22 10:29:15,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-22 10:29:15,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 440 transitions. [2020-12-22 10:29:15,101 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 440 transitions. Word has length 13 [2020-12-22 10:29:15,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:15,102 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 440 transitions. [2020-12-22 10:29:15,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:15,102 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 440 transitions. [2020-12-22 10:29:15,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:15,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:15,102 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:15,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:15,303 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:15,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:15,304 INFO L82 PathProgramCache]: Analyzing trace with hash 88359836, now seen corresponding path program 20 times [2020-12-22 10:29:15,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:15,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582868712] [2020-12-22 10:29:15,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:15,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582868712] [2020-12-22 10:29:15,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866810426] [2020-12-22 10:29:15,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:15,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:15,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:15,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:15,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:15,662 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:15,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:15,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:15,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829231161] [2020-12-22 10:29:15,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:15,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:15,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:15,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:15,664 INFO L87 Difference]: Start difference. First operand 165 states and 440 transitions. Second operand 17 states. [2020-12-22 10:29:15,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:15,887 INFO L93 Difference]: Finished difference Result 212 states and 535 transitions. [2020-12-22 10:29:15,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:29:15,888 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-22 10:29:15,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:15,889 INFO L225 Difference]: With dead ends: 212 [2020-12-22 10:29:15,889 INFO L226 Difference]: Without dead ends: 209 [2020-12-22 10:29:15,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:29:15,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-22 10:29:15,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 167. [2020-12-22 10:29:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-22 10:29:15,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 447 transitions. [2020-12-22 10:29:15,893 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 447 transitions. Word has length 13 [2020-12-22 10:29:15,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:15,893 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 447 transitions. [2020-12-22 10:29:15,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:15,893 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 447 transitions. [2020-12-22 10:29:15,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:29:15,894 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:15,894 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:16,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:16,095 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:16,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:16,095 INFO L82 PathProgramCache]: Analyzing trace with hash 88382156, now seen corresponding path program 21 times [2020-12-22 10:29:16,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:16,096 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140907380] [2020-12-22 10:29:16,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:16,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:16,213 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:16,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140907380] [2020-12-22 10:29:16,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1033291452] [2020-12-22 10:29:16,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:16,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 10:29:16,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:16,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:16,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:16,488 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:16,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:16,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:16,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015272798] [2020-12-22 10:29:16,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:16,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:16,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:16,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:16,491 INFO L87 Difference]: Start difference. First operand 167 states and 447 transitions. Second operand 17 states. [2020-12-22 10:29:16,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:16,752 INFO L93 Difference]: Finished difference Result 221 states and 559 transitions. [2020-12-22 10:29:16,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:29:16,753 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-22 10:29:16,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:16,755 INFO L225 Difference]: With dead ends: 221 [2020-12-22 10:29:16,755 INFO L226 Difference]: Without dead ends: 215 [2020-12-22 10:29:16,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:29:16,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-22 10:29:16,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-12-22 10:29:16,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-22 10:29:16,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 443 transitions. [2020-12-22 10:29:16,758 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 443 transitions. Word has length 13 [2020-12-22 10:29:16,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:16,758 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 443 transitions. [2020-12-22 10:29:16,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:16,758 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 443 transitions. [2020-12-22 10:29:16,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:16,759 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:16,759 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:16,959 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:16,960 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:16,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:16,960 INFO L82 PathProgramCache]: Analyzing trace with hash 437714495, now seen corresponding path program 69 times [2020-12-22 10:29:16,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:16,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663681874] [2020-12-22 10:29:16,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:16,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:17,079 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:17,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663681874] [2020-12-22 10:29:17,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139014976] [2020-12-22 10:29:17,080 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:17,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:17,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:17,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:29:17,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:17,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:17,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:17,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249078213] [2020-12-22 10:29:17,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:17,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:17,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:17,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:17,372 INFO L87 Difference]: Start difference. First operand 164 states and 443 transitions. Second operand 17 states. [2020-12-22 10:29:17,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:17,593 INFO L93 Difference]: Finished difference Result 210 states and 527 transitions. [2020-12-22 10:29:17,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:29:17,593 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:17,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:17,595 INFO L225 Difference]: With dead ends: 210 [2020-12-22 10:29:17,595 INFO L226 Difference]: Without dead ends: 208 [2020-12-22 10:29:17,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:29:17,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-22 10:29:17,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 170. [2020-12-22 10:29:17,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-22 10:29:17,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 453 transitions. [2020-12-22 10:29:17,601 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 453 transitions. Word has length 14 [2020-12-22 10:29:17,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:17,601 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 453 transitions. [2020-12-22 10:29:17,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:17,601 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 453 transitions. [2020-12-22 10:29:17,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:17,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:17,602 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:17,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:17,817 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:17,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:17,817 INFO L82 PathProgramCache]: Analyzing trace with hash 438082775, now seen corresponding path program 70 times [2020-12-22 10:29:17,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:17,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208306840] [2020-12-22 10:29:17,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:17,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:17,944 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:17,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208306840] [2020-12-22 10:29:17,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539376478] [2020-12-22 10:29:17,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:18,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:18,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:18,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:18,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:18,180 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:18,181 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:29:18,182 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:18,205 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:18,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:18,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:29:18,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602064015] [2020-12-22 10:29:18,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:29:18,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:18,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:29:18,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:29:18,207 INFO L87 Difference]: Start difference. First operand 170 states and 453 transitions. Second operand 18 states. [2020-12-22 10:29:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:18,853 INFO L93 Difference]: Finished difference Result 285 states and 693 transitions. [2020-12-22 10:29:18,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:29:18,854 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:29:18,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:18,857 INFO L225 Difference]: With dead ends: 285 [2020-12-22 10:29:18,857 INFO L226 Difference]: Without dead ends: 273 [2020-12-22 10:29:18,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=298, Invalid=694, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:29:18,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-12-22 10:29:18,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 166. [2020-12-22 10:29:18,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-22 10:29:18,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 449 transitions. [2020-12-22 10:29:18,863 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 449 transitions. Word has length 14 [2020-12-22 10:29:18,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:18,864 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 449 transitions. [2020-12-22 10:29:18,864 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:29:18,864 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 449 transitions. [2020-12-22 10:29:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:18,864 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:18,865 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:19,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:19,068 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:19,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:19,068 INFO L82 PathProgramCache]: Analyzing trace with hash -2124969700, now seen corresponding path program 71 times [2020-12-22 10:29:19,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:19,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369909163] [2020-12-22 10:29:19,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:19,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:19,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369909163] [2020-12-22 10:29:19,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889667375] [2020-12-22 10:29:19,183 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:19,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:19,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:19,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:19,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:19,522 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:19,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:19,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:19,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694896137] [2020-12-22 10:29:19,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:19,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:19,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:19,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:19,524 INFO L87 Difference]: Start difference. First operand 166 states and 449 transitions. Second operand 17 states. [2020-12-22 10:29:19,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:19,930 INFO L93 Difference]: Finished difference Result 241 states and 597 transitions. [2020-12-22 10:29:19,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:29:19,931 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:19,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:19,933 INFO L225 Difference]: With dead ends: 241 [2020-12-22 10:29:19,933 INFO L226 Difference]: Without dead ends: 239 [2020-12-22 10:29:19,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:29:19,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-12-22 10:29:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 170. [2020-12-22 10:29:19,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-22 10:29:19,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 455 transitions. [2020-12-22 10:29:19,938 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 455 transitions. Word has length 14 [2020-12-22 10:29:19,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:19,938 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 455 transitions. [2020-12-22 10:29:19,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:19,939 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 455 transitions. [2020-12-22 10:29:19,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:19,939 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:19,939 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:20,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:20,151 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:20,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:20,151 INFO L82 PathProgramCache]: Analyzing trace with hash -1771052620, now seen corresponding path program 72 times [2020-12-22 10:29:20,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:20,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437368031] [2020-12-22 10:29:20,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:20,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:20,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437368031] [2020-12-22 10:29:20,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664917104] [2020-12-22 10:29:20,260 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:20,339 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:20,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:20,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:20,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:20,616 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:20,616 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:20,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:20,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272327625] [2020-12-22 10:29:20,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:20,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:20,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:20,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:20,617 INFO L87 Difference]: Start difference. First operand 170 states and 455 transitions. Second operand 17 states. [2020-12-22 10:29:21,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:21,106 INFO L93 Difference]: Finished difference Result 252 states and 619 transitions. [2020-12-22 10:29:21,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:29:21,107 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:21,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:21,110 INFO L225 Difference]: With dead ends: 252 [2020-12-22 10:29:21,110 INFO L226 Difference]: Without dead ends: 250 [2020-12-22 10:29:21,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:29:21,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-22 10:29:21,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 172. [2020-12-22 10:29:21,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-22 10:29:21,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 462 transitions. [2020-12-22 10:29:21,115 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 462 transitions. Word has length 14 [2020-12-22 10:29:21,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:21,116 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 462 transitions. [2020-12-22 10:29:21,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:21,116 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 462 transitions. [2020-12-22 10:29:21,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:21,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:21,117 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:21,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-12-22 10:29:21,321 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:21,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:21,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1770447190, now seen corresponding path program 73 times [2020-12-22 10:29:21,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:21,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424836265] [2020-12-22 10:29:21,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:21,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:21,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424836265] [2020-12-22 10:29:21,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918136537] [2020-12-22 10:29:21,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:21,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:21,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:21,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:21,751 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:21,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:21,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:21,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785918529] [2020-12-22 10:29:21,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:21,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:21,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:21,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:21,752 INFO L87 Difference]: Start difference. First operand 172 states and 462 transitions. Second operand 17 states. [2020-12-22 10:29:22,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:22,330 INFO L93 Difference]: Finished difference Result 255 states and 633 transitions. [2020-12-22 10:29:22,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:29:22,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:22,333 INFO L225 Difference]: With dead ends: 255 [2020-12-22 10:29:22,333 INFO L226 Difference]: Without dead ends: 253 [2020-12-22 10:29:22,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:29:22,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-22 10:29:22,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 174. [2020-12-22 10:29:22,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-22 10:29:22,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 469 transitions. [2020-12-22 10:29:22,339 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 469 transitions. Word has length 14 [2020-12-22 10:29:22,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:22,339 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 469 transitions. [2020-12-22 10:29:22,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:22,339 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 469 transitions. [2020-12-22 10:29:22,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:22,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:22,340 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:22,540 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:22,541 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:22,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:22,541 INFO L82 PathProgramCache]: Analyzing trace with hash -1770427753, now seen corresponding path program 74 times [2020-12-22 10:29:22,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:22,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713552415] [2020-12-22 10:29:22,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:22,656 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:22,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713552415] [2020-12-22 10:29:22,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [395850176] [2020-12-22 10:29:22,657 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:22,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:22,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:22,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:22,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:22,931 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:22,933 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:22,934 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:22,948 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:22,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:22,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103192958] [2020-12-22 10:29:22,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:22,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:22,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:22,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:22,949 INFO L87 Difference]: Start difference. First operand 174 states and 469 transitions. Second operand 17 states. [2020-12-22 10:29:23,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:23,716 INFO L93 Difference]: Finished difference Result 265 states and 653 transitions. [2020-12-22 10:29:23,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:29:23,717 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:23,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:23,719 INFO L225 Difference]: With dead ends: 265 [2020-12-22 10:29:23,719 INFO L226 Difference]: Without dead ends: 257 [2020-12-22 10:29:23,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:29:23,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-22 10:29:23,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 175. [2020-12-22 10:29:23,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 10:29:23,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 474 transitions. [2020-12-22 10:29:23,724 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 474 transitions. Word has length 14 [2020-12-22 10:29:23,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:23,725 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 474 transitions. [2020-12-22 10:29:23,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:23,725 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 474 transitions. [2020-12-22 10:29:23,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:23,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:23,726 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:23,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-12-22 10:29:23,929 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:23,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:23,929 INFO L82 PathProgramCache]: Analyzing trace with hash -1770424870, now seen corresponding path program 75 times [2020-12-22 10:29:23,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:23,930 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818100917] [2020-12-22 10:29:23,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:23,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:24,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:24,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818100917] [2020-12-22 10:29:24,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008120711] [2020-12-22 10:29:24,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:24,107 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:24,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:24,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:24,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:24,332 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:29:24,335 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:29:24,337 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:24,375 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:24,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:24,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:29:24,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915685355] [2020-12-22 10:29:24,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:29:24,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:24,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:29:24,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:29:24,377 INFO L87 Difference]: Start difference. First operand 175 states and 474 transitions. Second operand 18 states. [2020-12-22 10:29:25,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:25,303 INFO L93 Difference]: Finished difference Result 318 states and 777 transitions. [2020-12-22 10:29:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:29:25,304 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:29:25,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:25,306 INFO L225 Difference]: With dead ends: 318 [2020-12-22 10:29:25,306 INFO L226 Difference]: Without dead ends: 306 [2020-12-22 10:29:25,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=417, Invalid=989, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:29:25,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-12-22 10:29:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 168. [2020-12-22 10:29:25,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-12-22 10:29:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 457 transitions. [2020-12-22 10:29:25,311 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 457 transitions. Word has length 14 [2020-12-22 10:29:25,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:25,311 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 457 transitions. [2020-12-22 10:29:25,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:29:25,311 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 457 transitions. [2020-12-22 10:29:25,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:25,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:25,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:25,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:25,515 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:25,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:25,515 INFO L82 PathProgramCache]: Analyzing trace with hash -2044516979, now seen corresponding path program 76 times [2020-12-22 10:29:25,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:25,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396552290] [2020-12-22 10:29:25,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:25,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:25,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:25,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396552290] [2020-12-22 10:29:25,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550505198] [2020-12-22 10:29:25,635 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:25,709 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:25,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:25,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:25,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:25,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:25,972 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:25,972 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:25,972 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499837975] [2020-12-22 10:29:25,973 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:25,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:25,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:25,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:25,974 INFO L87 Difference]: Start difference. First operand 168 states and 457 transitions. Second operand 17 states. [2020-12-22 10:29:26,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:26,512 INFO L93 Difference]: Finished difference Result 251 states and 623 transitions. [2020-12-22 10:29:26,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:29:26,513 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:26,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:26,515 INFO L225 Difference]: With dead ends: 251 [2020-12-22 10:29:26,515 INFO L226 Difference]: Without dead ends: 249 [2020-12-22 10:29:26,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:29:26,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-22 10:29:26,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 173. [2020-12-22 10:29:26,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-22 10:29:26,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 466 transitions. [2020-12-22 10:29:26,526 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 466 transitions. Word has length 14 [2020-12-22 10:29:26,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:26,526 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 466 transitions. [2020-12-22 10:29:26,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:26,526 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 466 transitions. [2020-12-22 10:29:26,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:26,527 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:26,527 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:26,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-12-22 10:29:26,739 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:26,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:26,740 INFO L82 PathProgramCache]: Analyzing trace with hash 336977909, now seen corresponding path program 77 times [2020-12-22 10:29:26,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:26,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365714298] [2020-12-22 10:29:26,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:26,836 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:26,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365714298] [2020-12-22 10:29:26,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826355558] [2020-12-22 10:29:26,836 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:26,905 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:26,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:26,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:26,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:27,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:27,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:27,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:27,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068227135] [2020-12-22 10:29:27,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:27,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:27,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:27,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:27,180 INFO L87 Difference]: Start difference. First operand 173 states and 466 transitions. Second operand 17 states. [2020-12-22 10:29:27,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:27,700 INFO L93 Difference]: Finished difference Result 252 states and 623 transitions. [2020-12-22 10:29:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:29:27,701 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:27,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:27,702 INFO L225 Difference]: With dead ends: 252 [2020-12-22 10:29:27,702 INFO L226 Difference]: Without dead ends: 250 [2020-12-22 10:29:27,703 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:29:27,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-22 10:29:27,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 173. [2020-12-22 10:29:27,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-22 10:29:27,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 465 transitions. [2020-12-22 10:29:27,707 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 465 transitions. Word has length 14 [2020-12-22 10:29:27,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:27,707 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 465 transitions. [2020-12-22 10:29:27,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:27,707 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 465 transitions. [2020-12-22 10:29:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:27,707 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:27,707 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:27,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-12-22 10:29:27,908 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:27,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:27,909 INFO L82 PathProgramCache]: Analyzing trace with hash 358427429, now seen corresponding path program 78 times [2020-12-22 10:29:27,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:27,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797336347] [2020-12-22 10:29:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:27,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:28,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:28,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797336347] [2020-12-22 10:29:28,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240427571] [2020-12-22 10:29:28,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:28,073 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:28,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:28,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:28,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:28,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:28,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:28,311 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:28,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288835417] [2020-12-22 10:29:28,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:28,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:28,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:28,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:28,312 INFO L87 Difference]: Start difference. First operand 173 states and 465 transitions. Second operand 17 states. [2020-12-22 10:29:28,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:28,983 INFO L93 Difference]: Finished difference Result 271 states and 671 transitions. [2020-12-22 10:29:28,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:29:28,984 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:28,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:28,985 INFO L225 Difference]: With dead ends: 271 [2020-12-22 10:29:28,985 INFO L226 Difference]: Without dead ends: 269 [2020-12-22 10:29:28,985 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=280, Invalid=712, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:29:28,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-22 10:29:28,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 175. [2020-12-22 10:29:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 10:29:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 472 transitions. [2020-12-22 10:29:28,989 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 472 transitions. Word has length 14 [2020-12-22 10:29:28,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:28,989 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 472 transitions. [2020-12-22 10:29:28,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:28,989 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 472 transitions. [2020-12-22 10:29:28,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:28,990 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:28,990 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:29,190 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-12-22 10:29:29,191 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:29,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:29,192 INFO L82 PathProgramCache]: Analyzing trace with hash 359032859, now seen corresponding path program 79 times [2020-12-22 10:29:29,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:29,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129314848] [2020-12-22 10:29:29,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:29,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:29,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129314848] [2020-12-22 10:29:29,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637864634] [2020-12-22 10:29:29,310 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:29,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:29,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:29,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:29,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:29,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:29,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:29,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918168842] [2020-12-22 10:29:29,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:29,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:29,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:29,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:29,621 INFO L87 Difference]: Start difference. First operand 175 states and 472 transitions. Second operand 17 states. [2020-12-22 10:29:30,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:30,316 INFO L93 Difference]: Finished difference Result 269 states and 664 transitions. [2020-12-22 10:29:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:29:30,316 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:30,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:30,317 INFO L225 Difference]: With dead ends: 269 [2020-12-22 10:29:30,317 INFO L226 Difference]: Without dead ends: 267 [2020-12-22 10:29:30,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:29:30,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-22 10:29:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 177. [2020-12-22 10:29:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 10:29:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 479 transitions. [2020-12-22 10:29:30,322 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 479 transitions. Word has length 14 [2020-12-22 10:29:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:30,322 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 479 transitions. [2020-12-22 10:29:30,322 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 479 transitions. [2020-12-22 10:29:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:30,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:30,322 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:30,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:30,524 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:30,525 INFO L82 PathProgramCache]: Analyzing trace with hash 359052296, now seen corresponding path program 80 times [2020-12-22 10:29:30,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:30,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958171737] [2020-12-22 10:29:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:30,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:30,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958171737] [2020-12-22 10:29:30,626 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716216879] [2020-12-22 10:29:30,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:30,686 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:30,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:30,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:30,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:30,914 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:30,915 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:30,916 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:30,932 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:30,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:30,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:30,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316461170] [2020-12-22 10:29:30,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:30,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:30,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:30,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:30,935 INFO L87 Difference]: Start difference. First operand 177 states and 479 transitions. Second operand 17 states. [2020-12-22 10:29:32,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:32,095 INFO L93 Difference]: Finished difference Result 286 states and 713 transitions. [2020-12-22 10:29:32,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:29:32,096 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:32,097 INFO L225 Difference]: With dead ends: 286 [2020-12-22 10:29:32,097 INFO L226 Difference]: Without dead ends: 278 [2020-12-22 10:29:32,097 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:29:32,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-22 10:29:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 178. [2020-12-22 10:29:32,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-22 10:29:32,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 484 transitions. [2020-12-22 10:29:32,102 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 484 transitions. Word has length 14 [2020-12-22 10:29:32,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:32,103 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 484 transitions. [2020-12-22 10:29:32,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:32,103 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 484 transitions. [2020-12-22 10:29:32,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:32,103 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:32,103 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:32,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-12-22 10:29:32,304 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:32,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:32,305 INFO L82 PathProgramCache]: Analyzing trace with hash 359055179, now seen corresponding path program 81 times [2020-12-22 10:29:32,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:32,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209542848] [2020-12-22 10:29:32,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:32,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:32,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209542848] [2020-12-22 10:29:32,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518418962] [2020-12-22 10:29:32,436 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:32,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:32,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:32,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:32,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:32,725 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:29:32,728 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:29:32,730 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:29:32,732 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:32,733 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:32,735 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:32,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:32,740 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:32,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:32,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:29:32,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638602197] [2020-12-22 10:29:32,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:29:32,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:32,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:29:32,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:29:32,821 INFO L87 Difference]: Start difference. First operand 178 states and 484 transitions. Second operand 18 states. [2020-12-22 10:29:34,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:34,102 INFO L93 Difference]: Finished difference Result 329 states and 812 transitions. [2020-12-22 10:29:34,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:29:34,103 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:29:34,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:34,104 INFO L225 Difference]: With dead ends: 329 [2020-12-22 10:29:34,105 INFO L226 Difference]: Without dead ends: 317 [2020-12-22 10:29:34,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=477, Invalid=1163, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:29:34,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-12-22 10:29:34,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 170. [2020-12-22 10:29:34,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-22 10:29:34,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 465 transitions. [2020-12-22 10:29:34,110 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 465 transitions. Word has length 14 [2020-12-22 10:29:34,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:34,110 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 465 transitions. [2020-12-22 10:29:34,110 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:29:34,110 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 465 transitions. [2020-12-22 10:29:34,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:34,110 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:34,110 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:34,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:34,311 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:34,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:34,312 INFO L82 PathProgramCache]: Analyzing trace with hash 446657436, now seen corresponding path program 82 times [2020-12-22 10:29:34,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:34,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72535013] [2020-12-22 10:29:34,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:34,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:34,455 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:34,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72535013] [2020-12-22 10:29:34,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31406482] [2020-12-22 10:29:34,456 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:34,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:34,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:34,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:34,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:34,760 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:34,761 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:34,761 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:34,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481619318] [2020-12-22 10:29:34,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:34,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:34,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:34,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:34,762 INFO L87 Difference]: Start difference. First operand 170 states and 465 transitions. Second operand 17 states. [2020-12-22 10:29:35,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:35,237 INFO L93 Difference]: Finished difference Result 244 states and 616 transitions. [2020-12-22 10:29:35,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:29:35,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:35,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:35,239 INFO L225 Difference]: With dead ends: 244 [2020-12-22 10:29:35,239 INFO L226 Difference]: Without dead ends: 242 [2020-12-22 10:29:35,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:29:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-12-22 10:29:35,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 171. [2020-12-22 10:29:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-22 10:29:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 468 transitions. [2020-12-22 10:29:35,247 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 468 transitions. Word has length 14 [2020-12-22 10:29:35,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:35,248 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 468 transitions. [2020-12-22 10:29:35,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:35,248 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 468 transitions. [2020-12-22 10:29:35,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:35,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:35,248 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:35,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-12-22 10:29:35,460 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:35,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:35,460 INFO L82 PathProgramCache]: Analyzing trace with hash 446660319, now seen corresponding path program 83 times [2020-12-22 10:29:35,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:35,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320758741] [2020-12-22 10:29:35,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:35,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:35,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320758741] [2020-12-22 10:29:35,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21475359] [2020-12-22 10:29:35,591 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:35,652 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:35,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:35,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:35,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:35,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:35,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:35,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409641846] [2020-12-22 10:29:35,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:35,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:35,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:35,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:35,871 INFO L87 Difference]: Start difference. First operand 171 states and 468 transitions. Second operand 17 states. [2020-12-22 10:29:36,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:36,443 INFO L93 Difference]: Finished difference Result 251 states and 630 transitions. [2020-12-22 10:29:36,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:29:36,445 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:36,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:36,446 INFO L225 Difference]: With dead ends: 251 [2020-12-22 10:29:36,446 INFO L226 Difference]: Without dead ends: 249 [2020-12-22 10:29:36,446 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:29:36,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-22 10:29:36,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 172. [2020-12-22 10:29:36,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-22 10:29:36,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 471 transitions. [2020-12-22 10:29:36,450 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 471 transitions. Word has length 14 [2020-12-22 10:29:36,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:36,450 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 471 transitions. [2020-12-22 10:29:36,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:36,450 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 471 transitions. [2020-12-22 10:29:36,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:36,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:36,451 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:36,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:36,652 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:36,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:36,652 INFO L82 PathProgramCache]: Analyzing trace with hash 446746809, now seen corresponding path program 84 times [2020-12-22 10:29:36,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:36,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343371791] [2020-12-22 10:29:36,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:36,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:36,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:36,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343371791] [2020-12-22 10:29:36,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [255184370] [2020-12-22 10:29:36,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:36,852 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:36,852 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:36,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:36,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:37,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:37,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:37,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552860009] [2020-12-22 10:29:37,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:37,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:37,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:37,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:37,048 INFO L87 Difference]: Start difference. First operand 172 states and 471 transitions. Second operand 17 states. [2020-12-22 10:29:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:37,477 INFO L93 Difference]: Finished difference Result 251 states and 628 transitions. [2020-12-22 10:29:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:29:37,478 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:37,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:37,479 INFO L225 Difference]: With dead ends: 251 [2020-12-22 10:29:37,479 INFO L226 Difference]: Without dead ends: 249 [2020-12-22 10:29:37,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:29:37,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-22 10:29:37,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 173. [2020-12-22 10:29:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-22 10:29:37,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 474 transitions. [2020-12-22 10:29:37,483 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 474 transitions. Word has length 14 [2020-12-22 10:29:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:37,483 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 474 transitions. [2020-12-22 10:29:37,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 474 transitions. [2020-12-22 10:29:37,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:37,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:37,484 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:37,684 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:37,685 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:37,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:37,685 INFO L82 PathProgramCache]: Analyzing trace with hash 449520255, now seen corresponding path program 85 times [2020-12-22 10:29:37,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:37,686 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289776838] [2020-12-22 10:29:37,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:37,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:37,830 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:37,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289776838] [2020-12-22 10:29:37,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026871533] [2020-12-22 10:29:37,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:37,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:37,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:37,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:38,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:38,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:38,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:38,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875285699] [2020-12-22 10:29:38,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:38,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:38,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:38,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:38,091 INFO L87 Difference]: Start difference. First operand 173 states and 474 transitions. Second operand 17 states. [2020-12-22 10:29:38,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:38,468 INFO L93 Difference]: Finished difference Result 242 states and 612 transitions. [2020-12-22 10:29:38,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:29:38,469 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:38,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:38,470 INFO L225 Difference]: With dead ends: 242 [2020-12-22 10:29:38,470 INFO L226 Difference]: Without dead ends: 240 [2020-12-22 10:29:38,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:29:38,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-22 10:29:38,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 177. [2020-12-22 10:29:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 10:29:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 478 transitions. [2020-12-22 10:29:38,475 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 478 transitions. Word has length 14 [2020-12-22 10:29:38,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:38,475 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 478 transitions. [2020-12-22 10:29:38,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 478 transitions. [2020-12-22 10:29:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:38,475 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:38,475 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:38,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-12-22 10:29:38,679 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:38,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:38,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1258554932, now seen corresponding path program 86 times [2020-12-22 10:29:38,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:38,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201337016] [2020-12-22 10:29:38,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:38,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:38,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201337016] [2020-12-22 10:29:38,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133325374] [2020-12-22 10:29:38,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:38,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:38,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:38,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:38,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:39,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:39,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:39,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:39,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625428039] [2020-12-22 10:29:39,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:39,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:39,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:39,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:39,068 INFO L87 Difference]: Start difference. First operand 177 states and 478 transitions. Second operand 17 states. [2020-12-22 10:29:39,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:39,553 INFO L93 Difference]: Finished difference Result 264 states and 654 transitions. [2020-12-22 10:29:39,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:29:39,554 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:39,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:39,555 INFO L225 Difference]: With dead ends: 264 [2020-12-22 10:29:39,555 INFO L226 Difference]: Without dead ends: 262 [2020-12-22 10:29:39,555 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:29:39,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-22 10:29:39,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 177. [2020-12-22 10:29:39,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 10:29:39,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 478 transitions. [2020-12-22 10:29:39,559 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 478 transitions. Word has length 14 [2020-12-22 10:29:39,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:39,560 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 478 transitions. [2020-12-22 10:29:39,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:39,560 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 478 transitions. [2020-12-22 10:29:39,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:39,560 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:39,560 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:39,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-12-22 10:29:39,761 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:39,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:39,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1258557815, now seen corresponding path program 87 times [2020-12-22 10:29:39,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:39,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673140127] [2020-12-22 10:29:39,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:39,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:39,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673140127] [2020-12-22 10:29:39,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247819105] [2020-12-22 10:29:39,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:39,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:29:39,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:39,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:39,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:40,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:40,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:40,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151026217] [2020-12-22 10:29:40,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:40,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:40,177 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:40,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:40,177 INFO L87 Difference]: Start difference. First operand 177 states and 478 transitions. Second operand 17 states. [2020-12-22 10:29:40,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:40,688 INFO L93 Difference]: Finished difference Result 268 states and 663 transitions. [2020-12-22 10:29:40,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:29:40,689 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:40,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:40,690 INFO L225 Difference]: With dead ends: 268 [2020-12-22 10:29:40,690 INFO L226 Difference]: Without dead ends: 266 [2020-12-22 10:29:40,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:29:40,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-22 10:29:40,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 178. [2020-12-22 10:29:40,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-22 10:29:40,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 481 transitions. [2020-12-22 10:29:40,695 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 481 transitions. Word has length 14 [2020-12-22 10:29:40,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:40,695 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 481 transitions. [2020-12-22 10:29:40,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:40,695 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 481 transitions. [2020-12-22 10:29:40,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:40,696 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:40,696 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:40,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:40,910 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:40,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:40,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1258644305, now seen corresponding path program 88 times [2020-12-22 10:29:40,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:40,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668793669] [2020-12-22 10:29:40,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:40,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:41,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668793669] [2020-12-22 10:29:41,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110784123] [2020-12-22 10:29:41,033 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:41,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:41,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:41,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:41,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:41,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:41,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:41,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:41,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277183148] [2020-12-22 10:29:41,296 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:41,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:41,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:41,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:41,297 INFO L87 Difference]: Start difference. First operand 178 states and 481 transitions. Second operand 17 states. [2020-12-22 10:29:41,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:41,739 INFO L93 Difference]: Finished difference Result 262 states and 651 transitions. [2020-12-22 10:29:41,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:29:41,740 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:41,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:41,741 INFO L225 Difference]: With dead ends: 262 [2020-12-22 10:29:41,741 INFO L226 Difference]: Without dead ends: 260 [2020-12-22 10:29:41,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:29:41,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-22 10:29:41,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 178. [2020-12-22 10:29:41,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-22 10:29:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 481 transitions. [2020-12-22 10:29:41,744 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 481 transitions. Word has length 14 [2020-12-22 10:29:41,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:41,745 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 481 transitions. [2020-12-22 10:29:41,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:41,745 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 481 transitions. [2020-12-22 10:29:41,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:41,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:41,745 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:41,946 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-12-22 10:29:41,946 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:41,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:41,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1261417751, now seen corresponding path program 89 times [2020-12-22 10:29:41,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:41,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645311014] [2020-12-22 10:29:41,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:42,080 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:42,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645311014] [2020-12-22 10:29:42,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708033026] [2020-12-22 10:29:42,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:42,158 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:42,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:42,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:42,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:42,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:42,384 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:42,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933037504] [2020-12-22 10:29:42,384 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:42,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:42,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:42,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:42,385 INFO L87 Difference]: Start difference. First operand 178 states and 481 transitions. Second operand 17 states. [2020-12-22 10:29:42,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:42,763 INFO L93 Difference]: Finished difference Result 248 states and 621 transitions. [2020-12-22 10:29:42,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:29:42,764 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:42,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:42,765 INFO L225 Difference]: With dead ends: 248 [2020-12-22 10:29:42,765 INFO L226 Difference]: Without dead ends: 246 [2020-12-22 10:29:42,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:29:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-22 10:29:42,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 177. [2020-12-22 10:29:42,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 10:29:42,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 477 transitions. [2020-12-22 10:29:42,769 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 477 transitions. Word has length 14 [2020-12-22 10:29:42,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:42,769 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 477 transitions. [2020-12-22 10:29:42,769 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:42,769 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 477 transitions. [2020-12-22 10:29:42,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:42,769 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:42,769 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:42,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-12-22 10:29:42,970 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:42,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:42,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1840373162, now seen corresponding path program 90 times [2020-12-22 10:29:42,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:42,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335548600] [2020-12-22 10:29:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:43,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335548600] [2020-12-22 10:29:43,092 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359438712] [2020-12-22 10:29:43,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:43,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:43,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:43,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:43,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:43,377 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:43,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:43,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:43,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113194519] [2020-12-22 10:29:43,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:43,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:43,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:43,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:43,380 INFO L87 Difference]: Start difference. First operand 177 states and 477 transitions. Second operand 17 states. [2020-12-22 10:29:44,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:44,111 INFO L93 Difference]: Finished difference Result 267 states and 657 transitions. [2020-12-22 10:29:44,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:29:44,112 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:44,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:44,113 INFO L225 Difference]: With dead ends: 267 [2020-12-22 10:29:44,113 INFO L226 Difference]: Without dead ends: 265 [2020-12-22 10:29:44,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:29:44,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-22 10:29:44,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 176. [2020-12-22 10:29:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-22 10:29:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 474 transitions. [2020-12-22 10:29:44,121 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 474 transitions. Word has length 14 [2020-12-22 10:29:44,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:44,121 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 474 transitions. [2020-12-22 10:29:44,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:44,121 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 474 transitions. [2020-12-22 10:29:44,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:44,121 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:44,122 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:44,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-12-22 10:29:44,334 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:44,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:44,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1840376045, now seen corresponding path program 91 times [2020-12-22 10:29:44,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:44,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712056560] [2020-12-22 10:29:44,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:44,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:44,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712056560] [2020-12-22 10:29:44,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815315365] [2020-12-22 10:29:44,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:44,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:44,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:44,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:44,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:44,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:44,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:44,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195651275] [2020-12-22 10:29:44,748 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:44,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:44,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:44,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:44,749 INFO L87 Difference]: Start difference. First operand 176 states and 474 transitions. Second operand 17 states. [2020-12-22 10:29:45,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:45,452 INFO L93 Difference]: Finished difference Result 269 states and 659 transitions. [2020-12-22 10:29:45,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:29:45,453 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:45,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:45,454 INFO L225 Difference]: With dead ends: 269 [2020-12-22 10:29:45,454 INFO L226 Difference]: Without dead ends: 267 [2020-12-22 10:29:45,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=281, Invalid=711, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:29:45,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-22 10:29:45,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 177. [2020-12-22 10:29:45,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 10:29:45,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 477 transitions. [2020-12-22 10:29:45,459 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 477 transitions. Word has length 14 [2020-12-22 10:29:45,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:45,459 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 477 transitions. [2020-12-22 10:29:45,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:45,459 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 477 transitions. [2020-12-22 10:29:45,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:45,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:45,459 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:45,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:45,660 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:45,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:45,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1840462535, now seen corresponding path program 92 times [2020-12-22 10:29:45,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:45,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422630154] [2020-12-22 10:29:45,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:45,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:45,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422630154] [2020-12-22 10:29:45,792 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020136733] [2020-12-22 10:29:45,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:45,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:45,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:45,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:45,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:46,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:46,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:46,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187046519] [2020-12-22 10:29:46,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:46,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:46,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:46,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:46,073 INFO L87 Difference]: Start difference. First operand 177 states and 477 transitions. Second operand 17 states. [2020-12-22 10:29:46,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:46,673 INFO L93 Difference]: Finished difference Result 262 states and 644 transitions. [2020-12-22 10:29:46,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:29:46,674 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:46,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:46,675 INFO L225 Difference]: With dead ends: 262 [2020-12-22 10:29:46,675 INFO L226 Difference]: Without dead ends: 260 [2020-12-22 10:29:46,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=622, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:29:46,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-22 10:29:46,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 176. [2020-12-22 10:29:46,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-22 10:29:46,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 474 transitions. [2020-12-22 10:29:46,679 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 474 transitions. Word has length 14 [2020-12-22 10:29:46,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:46,679 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 474 transitions. [2020-12-22 10:29:46,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:46,679 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 474 transitions. [2020-12-22 10:29:46,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:46,679 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:46,679 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:46,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-12-22 10:29:46,880 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:46,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:46,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1859141492, now seen corresponding path program 93 times [2020-12-22 10:29:46,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:46,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524222176] [2020-12-22 10:29:46,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:46,997 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:46,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524222176] [2020-12-22 10:29:46,998 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771542691] [2020-12-22 10:29:46,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:47,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:47,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:47,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:29:47,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:47,258 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:47,259 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:47,259 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-22 10:29:47,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007954826] [2020-12-22 10:29:47,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:29:47,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:47,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:29:47,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:29:47,260 INFO L87 Difference]: Start difference. First operand 176 states and 474 transitions. Second operand 16 states. [2020-12-22 10:29:47,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:47,935 INFO L93 Difference]: Finished difference Result 268 states and 659 transitions. [2020-12-22 10:29:47,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:29:47,936 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-12-22 10:29:47,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:47,937 INFO L225 Difference]: With dead ends: 268 [2020-12-22 10:29:47,937 INFO L226 Difference]: Without dead ends: 266 [2020-12-22 10:29:47,938 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:29:47,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-22 10:29:47,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 177. [2020-12-22 10:29:47,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 10:29:47,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 479 transitions. [2020-12-22 10:29:47,945 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 479 transitions. Word has length 14 [2020-12-22 10:29:47,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:47,945 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 479 transitions. [2020-12-22 10:29:47,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:29:47,946 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 479 transitions. [2020-12-22 10:29:47,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:47,946 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:47,946 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:48,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-12-22 10:29:48,160 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:48,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:48,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1859144375, now seen corresponding path program 94 times [2020-12-22 10:29:48,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:48,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1460688881] [2020-12-22 10:29:48,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:48,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:48,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1460688881] [2020-12-22 10:29:48,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1522916564] [2020-12-22 10:29:48,279 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:48,359 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:48,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:48,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:48,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:48,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:48,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:48,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:48,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607948902] [2020-12-22 10:29:48,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:48,569 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:48,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:48,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:48,570 INFO L87 Difference]: Start difference. First operand 177 states and 479 transitions. Second operand 17 states. [2020-12-22 10:29:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:49,442 INFO L93 Difference]: Finished difference Result 274 states and 670 transitions. [2020-12-22 10:29:49,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:29:49,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:49,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:49,444 INFO L225 Difference]: With dead ends: 274 [2020-12-22 10:29:49,444 INFO L226 Difference]: Without dead ends: 272 [2020-12-22 10:29:49,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=346, Invalid=844, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 10:29:49,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-22 10:29:49,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 178. [2020-12-22 10:29:49,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-22 10:29:49,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 481 transitions. [2020-12-22 10:29:49,452 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 481 transitions. Word has length 14 [2020-12-22 10:29:49,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:49,452 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 481 transitions. [2020-12-22 10:29:49,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:49,452 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 481 transitions. [2020-12-22 10:29:49,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:49,453 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:49,453 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:49,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:49,669 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:49,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:49,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1859746922, now seen corresponding path program 95 times [2020-12-22 10:29:49,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:49,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712376780] [2020-12-22 10:29:49,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:49,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:49,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:49,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712376780] [2020-12-22 10:29:49,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10764268] [2020-12-22 10:29:49,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:49,870 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:49,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:49,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:49,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:50,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:50,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:50,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:50,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923978489] [2020-12-22 10:29:50,068 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:50,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:50,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:50,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:50,068 INFO L87 Difference]: Start difference. First operand 178 states and 481 transitions. Second operand 17 states. [2020-12-22 10:29:50,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:50,916 INFO L93 Difference]: Finished difference Result 265 states and 661 transitions. [2020-12-22 10:29:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:29:50,917 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:50,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:50,918 INFO L225 Difference]: With dead ends: 265 [2020-12-22 10:29:50,918 INFO L226 Difference]: Without dead ends: 263 [2020-12-22 10:29:50,919 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:29:50,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-22 10:29:50,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 180. [2020-12-22 10:29:50,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-22 10:29:50,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 488 transitions. [2020-12-22 10:29:50,923 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 488 transitions. Word has length 14 [2020-12-22 10:29:50,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:50,924 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 488 transitions. [2020-12-22 10:29:50,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:50,924 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 488 transitions. [2020-12-22 10:29:50,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:50,924 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:50,924 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:51,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:51,125 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:51,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:51,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1859766359, now seen corresponding path program 96 times [2020-12-22 10:29:51,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:51,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17848802] [2020-12-22 10:29:51,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:51,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17848802] [2020-12-22 10:29:51,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254597140] [2020-12-22 10:29:51,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:51,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:29:51,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:51,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:29:51,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:51,501 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:51,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:51,516 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:51,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:51,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901034334] [2020-12-22 10:29:51,517 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:51,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:51,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:51,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:51,518 INFO L87 Difference]: Start difference. First operand 180 states and 488 transitions. Second operand 17 states. [2020-12-22 10:29:52,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:52,316 INFO L93 Difference]: Finished difference Result 263 states and 658 transitions. [2020-12-22 10:29:52,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:29:52,317 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:52,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:52,318 INFO L225 Difference]: With dead ends: 263 [2020-12-22 10:29:52,318 INFO L226 Difference]: Without dead ends: 255 [2020-12-22 10:29:52,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:29:52,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-22 10:29:52,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 180. [2020-12-22 10:29:52,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-22 10:29:52,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 488 transitions. [2020-12-22 10:29:52,323 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 488 transitions. Word has length 14 [2020-12-22 10:29:52,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:52,323 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 488 transitions. [2020-12-22 10:29:52,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:52,324 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 488 transitions. [2020-12-22 10:29:52,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:52,324 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:52,324 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:52,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:52,525 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:52,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:52,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1859769242, now seen corresponding path program 97 times [2020-12-22 10:29:52,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:52,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939825758] [2020-12-22 10:29:52,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:52,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:52,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939825758] [2020-12-22 10:29:52,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072572254] [2020-12-22 10:29:52,654 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:52,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:52,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:52,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:52,908 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:29:52,909 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:29:52,910 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:52,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:52,940 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:29:52,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052583399] [2020-12-22 10:29:52,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:29:52,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:52,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:29:52,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:29:52,941 INFO L87 Difference]: Start difference. First operand 180 states and 488 transitions. Second operand 18 states. [2020-12-22 10:29:54,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:54,240 INFO L93 Difference]: Finished difference Result 332 states and 817 transitions. [2020-12-22 10:29:54,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 10:29:54,241 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:29:54,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:54,242 INFO L225 Difference]: With dead ends: 332 [2020-12-22 10:29:54,242 INFO L226 Difference]: Without dead ends: 320 [2020-12-22 10:29:54,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=541, Invalid=1351, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:29:54,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-22 10:29:54,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 177. [2020-12-22 10:29:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 10:29:54,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 477 transitions. [2020-12-22 10:29:54,246 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 477 transitions. Word has length 14 [2020-12-22 10:29:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:54,246 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 477 transitions. [2020-12-22 10:29:54,246 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:29:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 477 transitions. [2020-12-22 10:29:54,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:54,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:54,246 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:54,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:54,447 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:54,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:54,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1861912055, now seen corresponding path program 98 times [2020-12-22 10:29:54,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:54,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69125258] [2020-12-22 10:29:54,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:54,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:54,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69125258] [2020-12-22 10:29:54,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680977312] [2020-12-22 10:29:54,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:54,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:29:54,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:54,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:54,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:54,821 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:54,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:54,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:54,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866744414] [2020-12-22 10:29:54,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:54,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:54,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:54,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:54,823 INFO L87 Difference]: Start difference. First operand 177 states and 477 transitions. Second operand 17 states. [2020-12-22 10:29:55,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:55,604 INFO L93 Difference]: Finished difference Result 271 states and 671 transitions. [2020-12-22 10:29:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:29:55,610 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:55,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:55,611 INFO L225 Difference]: With dead ends: 271 [2020-12-22 10:29:55,611 INFO L226 Difference]: Without dead ends: 269 [2020-12-22 10:29:55,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:29:55,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-22 10:29:55,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 179. [2020-12-22 10:29:55,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-22 10:29:55,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 487 transitions. [2020-12-22 10:29:55,615 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 487 transitions. Word has length 14 [2020-12-22 10:29:55,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:55,615 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 487 transitions. [2020-12-22 10:29:55,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:55,615 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 487 transitions. [2020-12-22 10:29:55,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:55,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:55,616 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:55,816 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-12-22 10:29:55,816 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:55,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:55,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1862517485, now seen corresponding path program 99 times [2020-12-22 10:29:55,817 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:55,818 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886005610] [2020-12-22 10:29:55,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:55,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:55,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:55,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886005610] [2020-12-22 10:29:55,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846714252] [2020-12-22 10:29:55,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:56,033 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:29:56,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:56,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:56,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:56,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:56,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:56,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:56,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180711153] [2020-12-22 10:29:56,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:56,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:56,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:56,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:56,256 INFO L87 Difference]: Start difference. First operand 179 states and 487 transitions. Second operand 17 states. [2020-12-22 10:29:57,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:57,147 INFO L93 Difference]: Finished difference Result 282 states and 693 transitions. [2020-12-22 10:29:57,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:29:57,148 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:57,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:57,149 INFO L225 Difference]: With dead ends: 282 [2020-12-22 10:29:57,149 INFO L226 Difference]: Without dead ends: 280 [2020-12-22 10:29:57,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=380, Invalid=880, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:29:57,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-12-22 10:29:57,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 181. [2020-12-22 10:29:57,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-22 10:29:57,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 494 transitions. [2020-12-22 10:29:57,154 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 494 transitions. Word has length 14 [2020-12-22 10:29:57,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:57,154 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 494 transitions. [2020-12-22 10:29:57,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:57,154 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 494 transitions. [2020-12-22 10:29:57,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:57,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:57,155 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:57,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-12-22 10:29:57,357 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:57,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:57,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1862536922, now seen corresponding path program 100 times [2020-12-22 10:29:57,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:57,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759190581] [2020-12-22 10:29:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:57,494 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:57,494 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759190581] [2020-12-22 10:29:57,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687604177] [2020-12-22 10:29:57,495 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:57,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:29:57,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:57,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:57,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:57,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:29:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:57,748 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:57,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:29:57,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408773332] [2020-12-22 10:29:57,749 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:29:57,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:57,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:29:57,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:29:57,750 INFO L87 Difference]: Start difference. First operand 181 states and 494 transitions. Second operand 17 states. [2020-12-22 10:29:58,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:29:58,872 INFO L93 Difference]: Finished difference Result 304 states and 753 transitions. [2020-12-22 10:29:58,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 10:29:58,873 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:29:58,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:29:58,874 INFO L225 Difference]: With dead ends: 304 [2020-12-22 10:29:58,874 INFO L226 Difference]: Without dead ends: 296 [2020-12-22 10:29:58,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:29:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-12-22 10:29:58,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 182. [2020-12-22 10:29:58,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 10:29:58,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 499 transitions. [2020-12-22 10:29:58,879 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 499 transitions. Word has length 14 [2020-12-22 10:29:58,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:29:58,879 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 499 transitions. [2020-12-22 10:29:58,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:29:58,879 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 499 transitions. [2020-12-22 10:29:58,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:29:58,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:29:58,880 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:29:59,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-12-22 10:29:59,081 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:29:59,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:29:59,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1862539805, now seen corresponding path program 101 times [2020-12-22 10:29:59,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:29:59,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044803454] [2020-12-22 10:29:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:29:59,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:29:59,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:59,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044803454] [2020-12-22 10:29:59,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633314932] [2020-12-22 10:29:59,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:29:59,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:29:59,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:29:59,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:29:59,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:29:59,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:29:59,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:29:59,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:29:59,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030837825] [2020-12-22 10:29:59,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:29:59,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:29:59,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:29:59,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:29:59,471 INFO L87 Difference]: Start difference. First operand 182 states and 499 transitions. Second operand 18 states. [2020-12-22 10:30:00,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:00,680 INFO L93 Difference]: Finished difference Result 330 states and 814 transitions. [2020-12-22 10:30:00,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 10:30:00,681 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:30:00,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:00,682 INFO L225 Difference]: With dead ends: 330 [2020-12-22 10:30:00,682 INFO L226 Difference]: Without dead ends: 318 [2020-12-22 10:30:00,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=540, Invalid=1352, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:30:00,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-22 10:30:00,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 175. [2020-12-22 10:30:00,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 10:30:00,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 469 transitions. [2020-12-22 10:30:00,686 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 469 transitions. Word has length 14 [2020-12-22 10:30:00,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:00,686 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 469 transitions. [2020-12-22 10:30:00,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:30:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 469 transitions. [2020-12-22 10:30:00,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:00,687 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:00,687 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:00,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:00,891 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:00,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:00,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1926352871, now seen corresponding path program 102 times [2020-12-22 10:30:00,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:00,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7947737] [2020-12-22 10:30:00,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:00,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:01,022 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:01,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7947737] [2020-12-22 10:30:01,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361605098] [2020-12-22 10:30:01,024 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:01,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:30:01,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:01,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:30:01,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:01,321 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:01,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:01,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:01,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [973175024] [2020-12-22 10:30:01,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:01,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:01,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:01,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:01,324 INFO L87 Difference]: Start difference. First operand 175 states and 469 transitions. Second operand 17 states. [2020-12-22 10:30:01,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:01,871 INFO L93 Difference]: Finished difference Result 253 states and 624 transitions. [2020-12-22 10:30:01,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:30:01,873 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:01,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:01,874 INFO L225 Difference]: With dead ends: 253 [2020-12-22 10:30:01,874 INFO L226 Difference]: Without dead ends: 251 [2020-12-22 10:30:01,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:30:01,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-22 10:30:01,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 175. [2020-12-22 10:30:01,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 10:30:01,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 468 transitions. [2020-12-22 10:30:01,879 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 468 transitions. Word has length 14 [2020-12-22 10:30:01,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:01,880 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 468 transitions. [2020-12-22 10:30:01,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:01,880 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 468 transitions. [2020-12-22 10:30:01,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:01,880 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:01,881 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:02,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-12-22 10:30:02,083 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:02,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:02,084 INFO L82 PathProgramCache]: Analyzing trace with hash 1947802391, now seen corresponding path program 103 times [2020-12-22 10:30:02,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:02,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950194600] [2020-12-22 10:30:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:02,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:02,222 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:02,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950194600] [2020-12-22 10:30:02,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849955907] [2020-12-22 10:30:02,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:02,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:02,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:02,473 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:02,474 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:02,474 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:02,474 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611674431] [2020-12-22 10:30:02,474 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:02,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:02,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:02,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:02,475 INFO L87 Difference]: Start difference. First operand 175 states and 468 transitions. Second operand 17 states. [2020-12-22 10:30:03,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:03,169 INFO L93 Difference]: Finished difference Result 252 states and 616 transitions. [2020-12-22 10:30:03,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:30:03,170 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:03,171 INFO L225 Difference]: With dead ends: 252 [2020-12-22 10:30:03,171 INFO L226 Difference]: Without dead ends: 250 [2020-12-22 10:30:03,172 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:30:03,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-22 10:30:03,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 175. [2020-12-22 10:30:03,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 10:30:03,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 467 transitions. [2020-12-22 10:30:03,175 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 467 transitions. Word has length 14 [2020-12-22 10:30:03,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:03,175 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 467 transitions. [2020-12-22 10:30:03,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:03,176 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 467 transitions. [2020-12-22 10:30:03,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:03,176 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:03,176 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:03,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:03,377 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:03,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:03,378 INFO L82 PathProgramCache]: Analyzing trace with hash 1948494311, now seen corresponding path program 104 times [2020-12-22 10:30:03,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:03,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315217129] [2020-12-22 10:30:03,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:03,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:03,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315217129] [2020-12-22 10:30:03,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767207834] [2020-12-22 10:30:03,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:03,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:03,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:03,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:03,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:03,779 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:03,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:03,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:03,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513949901] [2020-12-22 10:30:03,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:03,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:03,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:03,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:03,782 INFO L87 Difference]: Start difference. First operand 175 states and 467 transitions. Second operand 17 states. [2020-12-22 10:30:04,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:04,466 INFO L93 Difference]: Finished difference Result 247 states and 611 transitions. [2020-12-22 10:30:04,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:30:04,467 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:04,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:04,468 INFO L225 Difference]: With dead ends: 247 [2020-12-22 10:30:04,468 INFO L226 Difference]: Without dead ends: 245 [2020-12-22 10:30:04,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=310, Invalid=746, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:30:04,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-12-22 10:30:04,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 177. [2020-12-22 10:30:04,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 10:30:04,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 474 transitions. [2020-12-22 10:30:04,472 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 474 transitions. Word has length 14 [2020-12-22 10:30:04,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:04,472 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 474 transitions. [2020-12-22 10:30:04,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:04,472 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 474 transitions. [2020-12-22 10:30:04,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:04,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:04,473 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:04,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-12-22 10:30:04,681 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:04,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:04,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1948513748, now seen corresponding path program 105 times [2020-12-22 10:30:04,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:04,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481284524] [2020-12-22 10:30:04,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:04,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:04,838 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:04,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481284524] [2020-12-22 10:30:04,838 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569721828] [2020-12-22 10:30:04,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:04,916 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 10:30:04,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:04,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:30:04,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:05,091 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:05,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:05,092 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:05,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416719450] [2020-12-22 10:30:05,092 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:05,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:05,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:05,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:05,093 INFO L87 Difference]: Start difference. First operand 177 states and 474 transitions. Second operand 17 states. [2020-12-22 10:30:06,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:06,384 INFO L93 Difference]: Finished difference Result 330 states and 792 transitions. [2020-12-22 10:30:06,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 10:30:06,385 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:06,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:06,387 INFO L225 Difference]: With dead ends: 330 [2020-12-22 10:30:06,387 INFO L226 Difference]: Without dead ends: 318 [2020-12-22 10:30:06,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 10:30:06,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-22 10:30:06,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 174. [2020-12-22 10:30:06,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-22 10:30:06,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 470 transitions. [2020-12-22 10:30:06,391 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 470 transitions. Word has length 14 [2020-12-22 10:30:06,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:06,391 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 470 transitions. [2020-12-22 10:30:06,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:06,391 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 470 transitions. [2020-12-22 10:30:06,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:06,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:06,392 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:06,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:06,606 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:06,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:06,606 INFO L82 PathProgramCache]: Analyzing trace with hash 366512909, now seen corresponding path program 106 times [2020-12-22 10:30:06,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:06,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780449517] [2020-12-22 10:30:06,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780449517] [2020-12-22 10:30:06,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976554527] [2020-12-22 10:30:06,752 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:06,821 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:30:06,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:06,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:06,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:07,080 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:07,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:07,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:07,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251751397] [2020-12-22 10:30:07,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:07,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:07,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:07,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:07,084 INFO L87 Difference]: Start difference. First operand 174 states and 470 transitions. Second operand 17 states. [2020-12-22 10:30:07,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:07,581 INFO L93 Difference]: Finished difference Result 247 states and 621 transitions. [2020-12-22 10:30:07,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:30:07,582 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:07,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:07,583 INFO L225 Difference]: With dead ends: 247 [2020-12-22 10:30:07,583 INFO L226 Difference]: Without dead ends: 245 [2020-12-22 10:30:07,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:30:07,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-12-22 10:30:07,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 181. [2020-12-22 10:30:07,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-22 10:30:07,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 489 transitions. [2020-12-22 10:30:07,588 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 489 transitions. Word has length 14 [2020-12-22 10:30:07,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:07,588 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 489 transitions. [2020-12-22 10:30:07,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:07,588 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 489 transitions. [2020-12-22 10:30:07,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:07,588 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:07,589 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:07,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-12-22 10:30:07,790 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:07,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:07,791 INFO L82 PathProgramCache]: Analyzing trace with hash 369286355, now seen corresponding path program 107 times [2020-12-22 10:30:07,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:07,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056705126] [2020-12-22 10:30:07,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:07,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:07,940 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:07,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056705126] [2020-12-22 10:30:07,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [290710463] [2020-12-22 10:30:07,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:08,003 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:30:08,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:08,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:08,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:08,236 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:08,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:08,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:08,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133720758] [2020-12-22 10:30:08,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:08,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:08,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:08,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:08,239 INFO L87 Difference]: Start difference. First operand 181 states and 489 transitions. Second operand 17 states. [2020-12-22 10:30:08,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:08,695 INFO L93 Difference]: Finished difference Result 242 states and 612 transitions. [2020-12-22 10:30:08,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:30:08,696 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:08,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:08,697 INFO L225 Difference]: With dead ends: 242 [2020-12-22 10:30:08,697 INFO L226 Difference]: Without dead ends: 240 [2020-12-22 10:30:08,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:30:08,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-22 10:30:08,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 180. [2020-12-22 10:30:08,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-22 10:30:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 486 transitions. [2020-12-22 10:30:08,701 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 486 transitions. Word has length 14 [2020-12-22 10:30:08,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:08,701 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 486 transitions. [2020-12-22 10:30:08,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:08,701 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 486 transitions. [2020-12-22 10:30:08,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:08,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:08,702 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:08,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:08,902 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:08,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:08,903 INFO L82 PathProgramCache]: Analyzing trace with hash 452310989, now seen corresponding path program 108 times [2020-12-22 10:30:08,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:08,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632491953] [2020-12-22 10:30:08,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:08,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:09,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:09,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632491953] [2020-12-22 10:30:09,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969312843] [2020-12-22 10:30:09,043 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:09,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:30:09,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:09,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:09,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:09,318 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:09,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:09,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:09,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772768362] [2020-12-22 10:30:09,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:09,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:09,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:09,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:09,320 INFO L87 Difference]: Start difference. First operand 180 states and 486 transitions. Second operand 17 states. [2020-12-22 10:30:09,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:09,713 INFO L93 Difference]: Finished difference Result 239 states and 605 transitions. [2020-12-22 10:30:09,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:30:09,715 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:09,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:09,716 INFO L225 Difference]: With dead ends: 239 [2020-12-22 10:30:09,716 INFO L226 Difference]: Without dead ends: 237 [2020-12-22 10:30:09,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:30:09,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-22 10:30:09,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 183. [2020-12-22 10:30:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-22 10:30:09,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 494 transitions. [2020-12-22 10:30:09,720 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 494 transitions. Word has length 14 [2020-12-22 10:30:09,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:09,720 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 494 transitions. [2020-12-22 10:30:09,720 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:09,721 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 494 transitions. [2020-12-22 10:30:09,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:09,721 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:09,721 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:09,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-12-22 10:30:09,922 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:09,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:09,923 INFO L82 PathProgramCache]: Analyzing trace with hash 452313872, now seen corresponding path program 109 times [2020-12-22 10:30:09,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:09,923 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784389675] [2020-12-22 10:30:09,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:10,067 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:10,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784389675] [2020-12-22 10:30:10,068 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356828671] [2020-12-22 10:30:10,068 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:10,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:10,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:10,393 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:10,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:10,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:10,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354754266] [2020-12-22 10:30:10,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:10,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:10,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:10,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:10,395 INFO L87 Difference]: Start difference. First operand 183 states and 494 transitions. Second operand 17 states. [2020-12-22 10:30:10,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:10,790 INFO L93 Difference]: Finished difference Result 246 states and 619 transitions. [2020-12-22 10:30:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:30:10,791 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:10,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:10,792 INFO L225 Difference]: With dead ends: 246 [2020-12-22 10:30:10,792 INFO L226 Difference]: Without dead ends: 244 [2020-12-22 10:30:10,793 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:30:10,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-22 10:30:10,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 180. [2020-12-22 10:30:10,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-22 10:30:10,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 485 transitions. [2020-12-22 10:30:10,796 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 485 transitions. Word has length 14 [2020-12-22 10:30:10,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:10,796 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 485 transitions. [2020-12-22 10:30:10,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:10,796 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 485 transitions. [2020-12-22 10:30:10,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:10,796 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:10,796 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:10,997 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-12-22 10:30:10,997 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:10,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:10,998 INFO L82 PathProgramCache]: Analyzing trace with hash -234468491, now seen corresponding path program 110 times [2020-12-22 10:30:10,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:10,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404068694] [2020-12-22 10:30:10,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:11,132 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:11,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404068694] [2020-12-22 10:30:11,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294813339] [2020-12-22 10:30:11,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:11,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:11,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:11,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:11,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:11,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:11,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:11,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518716949] [2020-12-22 10:30:11,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:11,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:11,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:11,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:11,461 INFO L87 Difference]: Start difference. First operand 180 states and 485 transitions. Second operand 17 states. [2020-12-22 10:30:12,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:12,114 INFO L93 Difference]: Finished difference Result 265 states and 658 transitions. [2020-12-22 10:30:12,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:30:12,116 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:12,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:12,117 INFO L225 Difference]: With dead ends: 265 [2020-12-22 10:30:12,117 INFO L226 Difference]: Without dead ends: 263 [2020-12-22 10:30:12,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:30:12,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-22 10:30:12,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 184. [2020-12-22 10:30:12,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-22 10:30:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 496 transitions. [2020-12-22 10:30:12,121 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 496 transitions. Word has length 14 [2020-12-22 10:30:12,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:12,122 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 496 transitions. [2020-12-22 10:30:12,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:12,122 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 496 transitions. [2020-12-22 10:30:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:12,122 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:12,122 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:12,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-12-22 10:30:12,334 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:12,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:12,335 INFO L82 PathProgramCache]: Analyzing trace with hash -231695045, now seen corresponding path program 111 times [2020-12-22 10:30:12,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:12,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144583227] [2020-12-22 10:30:12,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:12,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:12,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144583227] [2020-12-22 10:30:12,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480401594] [2020-12-22 10:30:12,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:12,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:30:12,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:12,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:12,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:12,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:12,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:12,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240342432] [2020-12-22 10:30:12,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:12,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:12,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:12,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:12,817 INFO L87 Difference]: Start difference. First operand 184 states and 496 transitions. Second operand 17 states. [2020-12-22 10:30:13,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:13,382 INFO L93 Difference]: Finished difference Result 258 states and 645 transitions. [2020-12-22 10:30:13,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:30:13,383 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:13,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:13,385 INFO L225 Difference]: With dead ends: 258 [2020-12-22 10:30:13,385 INFO L226 Difference]: Without dead ends: 256 [2020-12-22 10:30:13,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:30:13,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-22 10:30:13,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 182. [2020-12-22 10:30:13,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 10:30:13,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 490 transitions. [2020-12-22 10:30:13,389 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 490 transitions. Word has length 14 [2020-12-22 10:30:13,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:13,389 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 490 transitions. [2020-12-22 10:30:13,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:13,389 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 490 transitions. [2020-12-22 10:30:13,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:13,389 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:13,390 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:13,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:13,596 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:13,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:13,597 INFO L82 PathProgramCache]: Analyzing trace with hash -148670411, now seen corresponding path program 112 times [2020-12-22 10:30:13,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:13,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949449982] [2020-12-22 10:30:13,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:13,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:13,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:13,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949449982] [2020-12-22 10:30:13,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848765287] [2020-12-22 10:30:13,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:13,800 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:30:13,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:13,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:13,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:14,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:14,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:14,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509591188] [2020-12-22 10:30:14,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:14,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:14,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:14,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:14,040 INFO L87 Difference]: Start difference. First operand 182 states and 490 transitions. Second operand 17 states. [2020-12-22 10:30:14,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:14,497 INFO L93 Difference]: Finished difference Result 262 states and 651 transitions. [2020-12-22 10:30:14,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:30:14,498 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:14,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:14,499 INFO L225 Difference]: With dead ends: 262 [2020-12-22 10:30:14,499 INFO L226 Difference]: Without dead ends: 260 [2020-12-22 10:30:14,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:30:14,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-22 10:30:14,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 185. [2020-12-22 10:30:14,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-22 10:30:14,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 498 transitions. [2020-12-22 10:30:14,503 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 498 transitions. Word has length 14 [2020-12-22 10:30:14,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:14,503 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 498 transitions. [2020-12-22 10:30:14,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:14,503 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 498 transitions. [2020-12-22 10:30:14,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:14,504 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:14,504 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:14,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:14,705 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:14,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:14,705 INFO L82 PathProgramCache]: Analyzing trace with hash -148667528, now seen corresponding path program 113 times [2020-12-22 10:30:14,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:14,706 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817037628] [2020-12-22 10:30:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:14,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:14,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:14,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817037628] [2020-12-22 10:30:14,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422843873] [2020-12-22 10:30:14,843 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:14,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 10:30:14,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:14,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:14,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:15,143 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:15,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:15,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:15,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698129264] [2020-12-22 10:30:15,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:15,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:15,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:15,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:15,145 INFO L87 Difference]: Start difference. First operand 185 states and 498 transitions. Second operand 17 states. [2020-12-22 10:30:15,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:15,689 INFO L93 Difference]: Finished difference Result 266 states and 658 transitions. [2020-12-22 10:30:15,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:30:15,690 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:15,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:15,691 INFO L225 Difference]: With dead ends: 266 [2020-12-22 10:30:15,691 INFO L226 Difference]: Without dead ends: 264 [2020-12-22 10:30:15,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:30:15,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-22 10:30:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 178. [2020-12-22 10:30:15,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-22 10:30:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 480 transitions. [2020-12-22 10:30:15,695 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 480 transitions. Word has length 14 [2020-12-22 10:30:15,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:15,695 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 480 transitions. [2020-12-22 10:30:15,695 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:15,695 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 480 transitions. [2020-12-22 10:30:15,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:15,695 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:15,695 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:15,896 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-12-22 10:30:15,896 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:15,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:15,897 INFO L82 PathProgramCache]: Analyzing trace with hash 622027455, now seen corresponding path program 114 times [2020-12-22 10:30:15,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:15,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860427068] [2020-12-22 10:30:15,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:16,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:16,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860427068] [2020-12-22 10:30:16,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332227794] [2020-12-22 10:30:16,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:16,116 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:30:16,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:16,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:16,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:16,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:16,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:16,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:16,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193321369] [2020-12-22 10:30:16,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:16,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:16,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:16,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:16,407 INFO L87 Difference]: Start difference. First operand 178 states and 480 transitions. Second operand 17 states. [2020-12-22 10:30:17,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:17,047 INFO L93 Difference]: Finished difference Result 267 states and 657 transitions. [2020-12-22 10:30:17,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:30:17,049 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:17,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:17,050 INFO L225 Difference]: With dead ends: 267 [2020-12-22 10:30:17,050 INFO L226 Difference]: Without dead ends: 265 [2020-12-22 10:30:17,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:30:17,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-22 10:30:17,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 179. [2020-12-22 10:30:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-22 10:30:17,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 483 transitions. [2020-12-22 10:30:17,053 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 483 transitions. Word has length 14 [2020-12-22 10:30:17,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:17,053 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 483 transitions. [2020-12-22 10:30:17,053 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:17,053 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 483 transitions. [2020-12-22 10:30:17,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:17,054 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:17,054 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:17,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-12-22 10:30:17,255 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:17,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:17,255 INFO L82 PathProgramCache]: Analyzing trace with hash 624800901, now seen corresponding path program 115 times [2020-12-22 10:30:17,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:17,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731251199] [2020-12-22 10:30:17,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:17,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:17,395 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:17,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731251199] [2020-12-22 10:30:17,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924749467] [2020-12-22 10:30:17,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:17,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:17,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:17,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:17,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:17,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469190652] [2020-12-22 10:30:17,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:17,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:17,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:17,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:17,690 INFO L87 Difference]: Start difference. First operand 179 states and 483 transitions. Second operand 17 states. [2020-12-22 10:30:18,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:18,283 INFO L93 Difference]: Finished difference Result 267 states and 656 transitions. [2020-12-22 10:30:18,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:30:18,284 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:18,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:18,286 INFO L225 Difference]: With dead ends: 267 [2020-12-22 10:30:18,286 INFO L226 Difference]: Without dead ends: 265 [2020-12-22 10:30:18,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:30:18,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-22 10:30:18,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 178. [2020-12-22 10:30:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-22 10:30:18,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 479 transitions. [2020-12-22 10:30:18,292 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 479 transitions. Word has length 14 [2020-12-22 10:30:18,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:18,292 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 479 transitions. [2020-12-22 10:30:18,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:18,293 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 479 transitions. [2020-12-22 10:30:18,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:18,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:18,293 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:18,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:18,508 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:18,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:18,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1203845685, now seen corresponding path program 116 times [2020-12-22 10:30:18,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:18,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959683037] [2020-12-22 10:30:18,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:18,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959683037] [2020-12-22 10:30:18,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092238363] [2020-12-22 10:30:18,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:18,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:18,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:18,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:18,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:19,029 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:19,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:19,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:19,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809032951] [2020-12-22 10:30:19,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:19,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:19,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:19,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:19,031 INFO L87 Difference]: Start difference. First operand 178 states and 479 transitions. Second operand 17 states. [2020-12-22 10:30:19,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:19,870 INFO L93 Difference]: Finished difference Result 278 states and 678 transitions. [2020-12-22 10:30:19,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:30:19,871 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:19,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:19,872 INFO L225 Difference]: With dead ends: 278 [2020-12-22 10:30:19,872 INFO L226 Difference]: Without dead ends: 276 [2020-12-22 10:30:19,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=292, Invalid=764, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:30:19,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-12-22 10:30:19,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 178. [2020-12-22 10:30:19,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-22 10:30:19,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 481 transitions. [2020-12-22 10:30:19,876 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 481 transitions. Word has length 14 [2020-12-22 10:30:19,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:19,877 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 481 transitions. [2020-12-22 10:30:19,877 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:19,877 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 481 transitions. [2020-12-22 10:30:19,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:19,877 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:19,877 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:20,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:20,078 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:20,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:20,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1225295205, now seen corresponding path program 117 times [2020-12-22 10:30:20,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:20,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953448155] [2020-12-22 10:30:20,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:20,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:20,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953448155] [2020-12-22 10:30:20,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309426484] [2020-12-22 10:30:20,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:20,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:30:20,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:20,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:20,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:20,566 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:20,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:20,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:20,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063043756] [2020-12-22 10:30:20,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:20,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:20,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:20,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:20,567 INFO L87 Difference]: Start difference. First operand 178 states and 481 transitions. Second operand 17 states. [2020-12-22 10:30:21,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:21,647 INFO L93 Difference]: Finished difference Result 286 states and 691 transitions. [2020-12-22 10:30:21,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:30:21,649 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:21,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:21,650 INFO L225 Difference]: With dead ends: 286 [2020-12-22 10:30:21,650 INFO L226 Difference]: Without dead ends: 284 [2020-12-22 10:30:21,650 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:30:21,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-12-22 10:30:21,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 179. [2020-12-22 10:30:21,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-22 10:30:21,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 486 transitions. [2020-12-22 10:30:21,654 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 486 transitions. Word has length 14 [2020-12-22 10:30:21,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:21,654 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 486 transitions. [2020-12-22 10:30:21,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:21,654 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 486 transitions. [2020-12-22 10:30:21,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:21,655 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:21,655 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:21,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:21,855 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:21,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:21,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1225900635, now seen corresponding path program 118 times [2020-12-22 10:30:21,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:21,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098646686] [2020-12-22 10:30:21,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:22,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:22,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098646686] [2020-12-22 10:30:22,003 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684923554] [2020-12-22 10:30:22,003 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:22,065 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:30:22,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:22,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:22,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:22,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:22,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:22,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246997962] [2020-12-22 10:30:22,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:22,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:22,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:22,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:22,304 INFO L87 Difference]: Start difference. First operand 179 states and 486 transitions. Second operand 17 states. [2020-12-22 10:30:23,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:23,520 INFO L93 Difference]: Finished difference Result 301 states and 729 transitions. [2020-12-22 10:30:23,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:30:23,521 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:23,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:23,522 INFO L225 Difference]: With dead ends: 301 [2020-12-22 10:30:23,523 INFO L226 Difference]: Without dead ends: 299 [2020-12-22 10:30:23,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=381, Invalid=879, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:30:23,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-12-22 10:30:23,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 181. [2020-12-22 10:30:23,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-22 10:30:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 493 transitions. [2020-12-22 10:30:23,528 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 493 transitions. Word has length 14 [2020-12-22 10:30:23,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:23,528 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 493 transitions. [2020-12-22 10:30:23,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:23,528 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 493 transitions. [2020-12-22 10:30:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:23,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:23,529 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:23,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-12-22 10:30:23,729 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:23,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:23,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1225920072, now seen corresponding path program 119 times [2020-12-22 10:30:23,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:23,731 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547116964] [2020-12-22 10:30:23,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:23,849 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:23,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547116964] [2020-12-22 10:30:23,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203101823] [2020-12-22 10:30:23,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:23,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:30:23,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:23,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:23,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:24,142 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:24,144 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:30:24,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:24,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:24,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:24,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:24,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639471624] [2020-12-22 10:30:24,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:24,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:24,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:24,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:24,167 INFO L87 Difference]: Start difference. First operand 181 states and 493 transitions. Second operand 17 states. [2020-12-22 10:30:25,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:25,640 INFO L93 Difference]: Finished difference Result 333 states and 816 transitions. [2020-12-22 10:30:25,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-22 10:30:25,641 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:25,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:25,643 INFO L225 Difference]: With dead ends: 333 [2020-12-22 10:30:25,643 INFO L226 Difference]: Without dead ends: 325 [2020-12-22 10:30:25,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 10:30:25,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-12-22 10:30:25,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 185. [2020-12-22 10:30:25,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-22 10:30:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 513 transitions. [2020-12-22 10:30:25,648 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 513 transitions. Word has length 14 [2020-12-22 10:30:25,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:25,648 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 513 transitions. [2020-12-22 10:30:25,648 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:25,649 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 513 transitions. [2020-12-22 10:30:25,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:25,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:25,649 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:25,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-12-22 10:30:25,858 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:25,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:25,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1225922955, now seen corresponding path program 120 times [2020-12-22 10:30:25,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:25,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675017905] [2020-12-22 10:30:25,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:26,039 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:26,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675017905] [2020-12-22 10:30:26,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893546318] [2020-12-22 10:30:26,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:26,119 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:30:26,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:26,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:26,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:26,413 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:30:26,415 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:30:26,417 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:26,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:26,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:26,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:30:26,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451312733] [2020-12-22 10:30:26,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:30:26,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:26,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:30:26,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:30:26,470 INFO L87 Difference]: Start difference. First operand 185 states and 513 transitions. Second operand 18 states. [2020-12-22 10:30:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:28,196 INFO L93 Difference]: Finished difference Result 369 states and 900 transitions. [2020-12-22 10:30:28,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 10:30:28,198 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:30:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:28,199 INFO L225 Difference]: With dead ends: 369 [2020-12-22 10:30:28,200 INFO L226 Difference]: Without dead ends: 357 [2020-12-22 10:30:28,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=571, Invalid=1409, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 10:30:28,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-12-22 10:30:28,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 178. [2020-12-22 10:30:28,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-22 10:30:28,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 477 transitions. [2020-12-22 10:30:28,204 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 477 transitions. Word has length 14 [2020-12-22 10:30:28,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:28,204 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 477 transitions. [2020-12-22 10:30:28,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:30:28,204 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 477 transitions. [2020-12-22 10:30:28,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:28,204 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:28,204 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:28,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-12-22 10:30:28,405 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:28,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:28,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1289736021, now seen corresponding path program 121 times [2020-12-22 10:30:28,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:28,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145287006] [2020-12-22 10:30:28,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:28,558 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:28,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145287006] [2020-12-22 10:30:28,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113573484] [2020-12-22 10:30:28,558 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:28,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:28,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:28,880 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:28,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:28,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:28,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497512526] [2020-12-22 10:30:28,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:28,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:28,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:28,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:28,882 INFO L87 Difference]: Start difference. First operand 178 states and 477 transitions. Second operand 17 states. [2020-12-22 10:30:29,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:29,809 INFO L93 Difference]: Finished difference Result 278 states and 670 transitions. [2020-12-22 10:30:29,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:30:29,811 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:29,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:29,812 INFO L225 Difference]: With dead ends: 278 [2020-12-22 10:30:29,812 INFO L226 Difference]: Without dead ends: 276 [2020-12-22 10:30:29,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:30:29,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-12-22 10:30:29,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 178. [2020-12-22 10:30:29,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-22 10:30:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 476 transitions. [2020-12-22 10:30:29,816 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 476 transitions. Word has length 14 [2020-12-22 10:30:29,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:29,816 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 476 transitions. [2020-12-22 10:30:29,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:29,816 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 476 transitions. [2020-12-22 10:30:29,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:29,816 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:29,816 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:30,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-12-22 10:30:30,017 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:30,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:30,018 INFO L82 PathProgramCache]: Analyzing trace with hash 1311185541, now seen corresponding path program 122 times [2020-12-22 10:30:30,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:30,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099221782] [2020-12-22 10:30:30,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:30,172 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:30,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099221782] [2020-12-22 10:30:30,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408432299] [2020-12-22 10:30:30,172 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:30,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:30,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:30,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:30,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:30,502 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:30,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:30,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:30,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128531428] [2020-12-22 10:30:30,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:30,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:30,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:30,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:30,504 INFO L87 Difference]: Start difference. First operand 178 states and 476 transitions. Second operand 17 states. [2020-12-22 10:30:31,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:31,569 INFO L93 Difference]: Finished difference Result 287 states and 690 transitions. [2020-12-22 10:30:31,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-22 10:30:31,571 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:31,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:31,572 INFO L225 Difference]: With dead ends: 287 [2020-12-22 10:30:31,572 INFO L226 Difference]: Without dead ends: 285 [2020-12-22 10:30:31,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:30:31,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-12-22 10:30:31,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 180. [2020-12-22 10:30:31,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-22 10:30:31,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 483 transitions. [2020-12-22 10:30:31,576 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 483 transitions. Word has length 14 [2020-12-22 10:30:31,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:31,576 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 483 transitions. [2020-12-22 10:30:31,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:31,576 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 483 transitions. [2020-12-22 10:30:31,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:31,576 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:31,576 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:31,777 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-12-22 10:30:31,777 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:31,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:31,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1311877461, now seen corresponding path program 123 times [2020-12-22 10:30:31,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:31,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [89935471] [2020-12-22 10:30:31,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:31,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:31,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [89935471] [2020-12-22 10:30:31,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023498767] [2020-12-22 10:30:31,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:31,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:30:31,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:31,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:31,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:32,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:32,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:32,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986943376] [2020-12-22 10:30:32,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:32,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:32,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:32,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:32,257 INFO L87 Difference]: Start difference. First operand 180 states and 483 transitions. Second operand 17 states. [2020-12-22 10:30:33,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:33,273 INFO L93 Difference]: Finished difference Result 283 states and 690 transitions. [2020-12-22 10:30:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:30:33,274 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:33,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:33,277 INFO L225 Difference]: With dead ends: 283 [2020-12-22 10:30:33,277 INFO L226 Difference]: Without dead ends: 281 [2020-12-22 10:30:33,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:30:33,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-12-22 10:30:33,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 182. [2020-12-22 10:30:33,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 10:30:33,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 490 transitions. [2020-12-22 10:30:33,284 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 490 transitions. Word has length 14 [2020-12-22 10:30:33,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:33,284 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 490 transitions. [2020-12-22 10:30:33,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:33,284 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 490 transitions. [2020-12-22 10:30:33,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:33,285 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:33,285 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:33,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-12-22 10:30:33,498 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:33,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:33,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1311896898, now seen corresponding path program 124 times [2020-12-22 10:30:33,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:33,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522274829] [2020-12-22 10:30:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:33,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:33,666 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:33,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522274829] [2020-12-22 10:30:33,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778675181] [2020-12-22 10:30:33,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:33,731 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:30:33,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:33,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:33,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:33,966 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:34,006 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:34,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:34,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:30:34,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588016705] [2020-12-22 10:30:34,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:30:34,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:34,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:30:34,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:30:34,008 INFO L87 Difference]: Start difference. First operand 182 states and 490 transitions. Second operand 18 states. [2020-12-22 10:30:35,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:35,523 INFO L93 Difference]: Finished difference Result 351 states and 843 transitions. [2020-12-22 10:30:35,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 10:30:35,524 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:30:35,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:35,525 INFO L225 Difference]: With dead ends: 351 [2020-12-22 10:30:35,526 INFO L226 Difference]: Without dead ends: 339 [2020-12-22 10:30:35,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=541, Invalid=1351, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:30:35,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-12-22 10:30:35,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 174. [2020-12-22 10:30:35,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-22 10:30:35,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 458 transitions. [2020-12-22 10:30:35,536 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 458 transitions. Word has length 14 [2020-12-22 10:30:35,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:35,537 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 458 transitions. [2020-12-22 10:30:35,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:30:35,537 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 458 transitions. [2020-12-22 10:30:35,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:35,537 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:35,537 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:35,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:35,738 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:35,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:35,739 INFO L82 PathProgramCache]: Analyzing trace with hash -1010518171, now seen corresponding path program 125 times [2020-12-22 10:30:35,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:35,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623775351] [2020-12-22 10:30:35,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:35,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:35,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623775351] [2020-12-22 10:30:35,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1481109453] [2020-12-22 10:30:35,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:35,960 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:30:35,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:35,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:35,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:36,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:36,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:36,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:36,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235079862] [2020-12-22 10:30:36,176 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:36,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:36,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:36,177 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:36,177 INFO L87 Difference]: Start difference. First operand 174 states and 458 transitions. Second operand 17 states. [2020-12-22 10:30:36,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:36,800 INFO L93 Difference]: Finished difference Result 264 states and 642 transitions. [2020-12-22 10:30:36,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:30:36,802 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:36,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:36,803 INFO L225 Difference]: With dead ends: 264 [2020-12-22 10:30:36,803 INFO L226 Difference]: Without dead ends: 262 [2020-12-22 10:30:36,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:30:36,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-22 10:30:36,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 177. [2020-12-22 10:30:36,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 10:30:36,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 466 transitions. [2020-12-22 10:30:36,807 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 466 transitions. Word has length 14 [2020-12-22 10:30:36,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:36,807 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 466 transitions. [2020-12-22 10:30:36,807 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:36,807 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 466 transitions. [2020-12-22 10:30:36,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:36,808 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:36,808 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:37,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-12-22 10:30:37,009 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:37,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:37,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1010425915, now seen corresponding path program 126 times [2020-12-22 10:30:37,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:37,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440979124] [2020-12-22 10:30:37,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:37,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:37,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:37,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440979124] [2020-12-22 10:30:37,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206443167] [2020-12-22 10:30:37,164 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:37,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:30:37,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:37,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:37,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:37,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:37,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:37,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:37,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784841308] [2020-12-22 10:30:37,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:37,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:37,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:37,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:37,562 INFO L87 Difference]: Start difference. First operand 177 states and 466 transitions. Second operand 17 states. [2020-12-22 10:30:38,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:38,212 INFO L93 Difference]: Finished difference Result 259 states and 631 transitions. [2020-12-22 10:30:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:30:38,213 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:38,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:38,215 INFO L225 Difference]: With dead ends: 259 [2020-12-22 10:30:38,215 INFO L226 Difference]: Without dead ends: 257 [2020-12-22 10:30:38,216 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:30:38,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-22 10:30:38,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 176. [2020-12-22 10:30:38,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-22 10:30:38,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 463 transitions. [2020-12-22 10:30:38,220 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 463 transitions. Word has length 14 [2020-12-22 10:30:38,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:38,220 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 463 transitions. [2020-12-22 10:30:38,220 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:38,220 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 463 transitions. [2020-12-22 10:30:38,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:38,221 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:38,221 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:38,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:38,422 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:38,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:38,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1007744725, now seen corresponding path program 127 times [2020-12-22 10:30:38,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:38,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641077202] [2020-12-22 10:30:38,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:38,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:38,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641077202] [2020-12-22 10:30:38,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194877662] [2020-12-22 10:30:38,567 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:38,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:38,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:38,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:38,897 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:38,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:38,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:38,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825131757] [2020-12-22 10:30:38,898 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:38,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:38,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:38,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:38,899 INFO L87 Difference]: Start difference. First operand 176 states and 463 transitions. Second operand 17 states. [2020-12-22 10:30:39,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:39,385 INFO L93 Difference]: Finished difference Result 253 states and 618 transitions. [2020-12-22 10:30:39,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:30:39,386 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:39,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:39,387 INFO L225 Difference]: With dead ends: 253 [2020-12-22 10:30:39,387 INFO L226 Difference]: Without dead ends: 251 [2020-12-22 10:30:39,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:30:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-22 10:30:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 172. [2020-12-22 10:30:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-22 10:30:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 453 transitions. [2020-12-22 10:30:39,392 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 453 transitions. Word has length 14 [2020-12-22 10:30:39,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:39,392 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 453 transitions. [2020-12-22 10:30:39,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:39,392 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 453 transitions. [2020-12-22 10:30:39,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:39,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:39,393 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:39,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:39,594 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:39,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:39,594 INFO L82 PathProgramCache]: Analyzing trace with hash -428699941, now seen corresponding path program 128 times [2020-12-22 10:30:39,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:39,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141067522] [2020-12-22 10:30:39,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:39,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:39,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141067522] [2020-12-22 10:30:39,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973488046] [2020-12-22 10:30:39,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:39,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:30:39,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:39,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:39,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:40,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:40,087 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:40,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:40,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193885573] [2020-12-22 10:30:40,088 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:40,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:40,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:40,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:40,089 INFO L87 Difference]: Start difference. First operand 172 states and 453 transitions. Second operand 17 states. [2020-12-22 10:30:40,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:40,724 INFO L93 Difference]: Finished difference Result 261 states and 626 transitions. [2020-12-22 10:30:40,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:30:40,726 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:40,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:40,727 INFO L225 Difference]: With dead ends: 261 [2020-12-22 10:30:40,727 INFO L226 Difference]: Without dead ends: 259 [2020-12-22 10:30:40,727 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:30:40,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-22 10:30:40,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 172. [2020-12-22 10:30:40,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-22 10:30:40,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 453 transitions. [2020-12-22 10:30:40,732 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 453 transitions. Word has length 14 [2020-12-22 10:30:40,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:40,732 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 453 transitions. [2020-12-22 10:30:40,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:40,732 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 453 transitions. [2020-12-22 10:30:40,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:40,732 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:40,733 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:40,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:40,948 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:40,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:40,948 INFO L82 PathProgramCache]: Analyzing trace with hash -428607685, now seen corresponding path program 129 times [2020-12-22 10:30:40,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:40,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117135682] [2020-12-22 10:30:40,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:40,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:41,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117135682] [2020-12-22 10:30:41,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877843200] [2020-12-22 10:30:41,104 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:41,169 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:30:41,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:41,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:41,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:41,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:41,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:41,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:41,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975287743] [2020-12-22 10:30:41,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:41,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:41,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:41,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:41,516 INFO L87 Difference]: Start difference. First operand 172 states and 453 transitions. Second operand 17 states. [2020-12-22 10:30:42,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:42,242 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-12-22 10:30:42,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:30:42,243 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:42,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:42,244 INFO L225 Difference]: With dead ends: 262 [2020-12-22 10:30:42,245 INFO L226 Difference]: Without dead ends: 260 [2020-12-22 10:30:42,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:30:42,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-22 10:30:42,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 172. [2020-12-22 10:30:42,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-22 10:30:42,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 452 transitions. [2020-12-22 10:30:42,250 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 452 transitions. Word has length 14 [2020-12-22 10:30:42,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:42,250 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 452 transitions. [2020-12-22 10:30:42,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:42,250 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 452 transitions. [2020-12-22 10:30:42,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:42,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:42,251 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:42,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:42,467 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:42,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:42,467 INFO L82 PathProgramCache]: Analyzing trace with hash -409931611, now seen corresponding path program 130 times [2020-12-22 10:30:42,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:42,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507378763] [2020-12-22 10:30:42,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:42,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:42,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:42,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507378763] [2020-12-22 10:30:42,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706308043] [2020-12-22 10:30:42,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:42,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:30:42,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:42,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:42,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:42,965 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:42,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:42,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65365619] [2020-12-22 10:30:42,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:42,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:42,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:42,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:42,967 INFO L87 Difference]: Start difference. First operand 172 states and 452 transitions. Second operand 17 states. [2020-12-22 10:30:43,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:43,851 INFO L93 Difference]: Finished difference Result 272 states and 651 transitions. [2020-12-22 10:30:43,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:30:43,853 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:43,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:43,854 INFO L225 Difference]: With dead ends: 272 [2020-12-22 10:30:43,854 INFO L226 Difference]: Without dead ends: 270 [2020-12-22 10:30:43,854 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=282, Invalid=710, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:30:43,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-12-22 10:30:43,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 174. [2020-12-22 10:30:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-22 10:30:43,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 462 transitions. [2020-12-22 10:30:43,858 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 462 transitions. Word has length 14 [2020-12-22 10:30:43,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:43,858 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 462 transitions. [2020-12-22 10:30:43,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:43,858 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 462 transitions. [2020-12-22 10:30:43,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:43,859 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:43,859 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:44,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-12-22 10:30:44,060 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:44,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:44,061 INFO L82 PathProgramCache]: Analyzing trace with hash -409326181, now seen corresponding path program 131 times [2020-12-22 10:30:44,061 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:44,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507232548] [2020-12-22 10:30:44,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:44,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:44,221 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507232548] [2020-12-22 10:30:44,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144118943] [2020-12-22 10:30:44,222 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:44,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:30:44,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:44,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:44,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:44,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:44,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:30:44,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944456526] [2020-12-22 10:30:44,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:30:44,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:44,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:30:44,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:30:44,595 INFO L87 Difference]: Start difference. First operand 174 states and 462 transitions. Second operand 17 states. [2020-12-22 10:30:45,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:30:45,599 INFO L93 Difference]: Finished difference Result 273 states and 666 transitions. [2020-12-22 10:30:45,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:30:45,601 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:30:45,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:30:45,605 INFO L225 Difference]: With dead ends: 273 [2020-12-22 10:30:45,605 INFO L226 Difference]: Without dead ends: 271 [2020-12-22 10:30:45,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:30:45,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-12-22 10:30:45,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 177. [2020-12-22 10:30:45,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 10:30:45,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 474 transitions. [2020-12-22 10:30:45,611 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 474 transitions. Word has length 14 [2020-12-22 10:30:45,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:30:45,612 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 474 transitions. [2020-12-22 10:30:45,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:30:45,612 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 474 transitions. [2020-12-22 10:30:45,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:30:45,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:30:45,613 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:30:45,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-12-22 10:30:45,829 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:30:45,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:30:45,829 INFO L82 PathProgramCache]: Analyzing trace with hash -409303861, now seen corresponding path program 132 times [2020-12-22 10:30:45,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:30:45,830 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636203944] [2020-12-22 10:30:45,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:30:45,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:30:46,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:46,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636203944] [2020-12-22 10:30:46,006 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148838793] [2020-12-22 10:30:46,006 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:30:46,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:30:46,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:30:46,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:30:46,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:30:46,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-22 10:30:46,350 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:30:46,352 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:46,354 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:30:46,357 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:30:46,359 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-22 10:30:46,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:30:46,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:30:46,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:30:46,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097146738] [2020-12-22 10:30:46,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:30:46,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:30:46,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:30:46,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:30:46,469 INFO L87 Difference]: Start difference. First operand 177 states and 474 transitions. Second operand 18 states. [2020-12-22 10:30:55,258 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 10:31:06,241 WARN L197 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 29 [2020-12-22 10:31:18,517 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 46 [2020-12-22 10:32:09,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:09,148 INFO L93 Difference]: Finished difference Result 387 states and 925 transitions. [2020-12-22 10:32:09,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-22 10:32:09,150 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:32:09,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:09,151 INFO L225 Difference]: With dead ends: 387 [2020-12-22 10:32:09,151 INFO L226 Difference]: Without dead ends: 375 [2020-12-22 10:32:09,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=494, Invalid=1296, Unknown=16, NotChecked=0, Total=1806 [2020-12-22 10:32:09,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-12-22 10:32:09,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 178. [2020-12-22 10:32:09,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-22 10:32:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 472 transitions. [2020-12-22 10:32:09,156 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 472 transitions. Word has length 14 [2020-12-22 10:32:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:09,156 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 472 transitions. [2020-12-22 10:32:09,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:32:09,156 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 472 transitions. [2020-12-22 10:32:09,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:32:09,156 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:09,156 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:09,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-12-22 10:32:09,357 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:09,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:09,358 INFO L82 PathProgramCache]: Analyzing trace with hash -407158165, now seen corresponding path program 133 times [2020-12-22 10:32:09,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:09,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825477603] [2020-12-22 10:32:09,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:09,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:09,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:09,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825477603] [2020-12-22 10:32:09,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657871183] [2020-12-22 10:32:09,516 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:09,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:32:09,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:09,902 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:09,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:09,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:32:09,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470081824] [2020-12-22 10:32:09,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:32:09,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:09,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:32:09,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:32:09,904 INFO L87 Difference]: Start difference. First operand 178 states and 472 transitions. Second operand 17 states. [2020-12-22 10:32:10,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:10,864 INFO L93 Difference]: Finished difference Result 277 states and 671 transitions. [2020-12-22 10:32:10,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:32:10,865 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:32:10,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:10,866 INFO L225 Difference]: With dead ends: 277 [2020-12-22 10:32:10,866 INFO L226 Difference]: Without dead ends: 275 [2020-12-22 10:32:10,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:32:10,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-22 10:32:10,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 180. [2020-12-22 10:32:10,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-22 10:32:10,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 479 transitions. [2020-12-22 10:32:10,871 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 479 transitions. Word has length 14 [2020-12-22 10:32:10,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:10,871 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 479 transitions. [2020-12-22 10:32:10,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:32:10,871 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 479 transitions. [2020-12-22 10:32:10,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:32:10,872 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:10,872 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:11,074 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-12-22 10:32:11,075 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:11,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:11,075 INFO L82 PathProgramCache]: Analyzing trace with hash -406466245, now seen corresponding path program 134 times [2020-12-22 10:32:11,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:11,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276009515] [2020-12-22 10:32:11,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:11,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:11,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276009515] [2020-12-22 10:32:11,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669533896] [2020-12-22 10:32:11,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:11,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:32:11,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:11,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:32:11,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:11,594 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:11,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:11,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:32:11,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946411168] [2020-12-22 10:32:11,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:32:11,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:11,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:32:11,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:32:11,596 INFO L87 Difference]: Start difference. First operand 180 states and 479 transitions. Second operand 17 states. [2020-12-22 10:32:12,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:12,545 INFO L93 Difference]: Finished difference Result 279 states and 685 transitions. [2020-12-22 10:32:12,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:32:12,546 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:32:12,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:12,547 INFO L225 Difference]: With dead ends: 279 [2020-12-22 10:32:12,547 INFO L226 Difference]: Without dead ends: 277 [2020-12-22 10:32:12,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:32:12,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-12-22 10:32:12,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 182. [2020-12-22 10:32:12,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-22 10:32:12,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 486 transitions. [2020-12-22 10:32:12,552 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 486 transitions. Word has length 14 [2020-12-22 10:32:12,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:12,552 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 486 transitions. [2020-12-22 10:32:12,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:32:12,552 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 486 transitions. [2020-12-22 10:32:12,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:32:12,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:12,553 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:12,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:12,768 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:12,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:12,768 INFO L82 PathProgramCache]: Analyzing trace with hash -406446808, now seen corresponding path program 135 times [2020-12-22 10:32:12,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:12,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750640640] [2020-12-22 10:32:12,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:12,951 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:12,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750640640] [2020-12-22 10:32:12,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409762549] [2020-12-22 10:32:12,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:13,015 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:32:13,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:13,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:32:13,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:13,277 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:32:13,279 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:32:13,280 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:32:13,330 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:13,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:13,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:32:13,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342359994] [2020-12-22 10:32:13,331 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:32:13,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:13,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:32:13,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:32:13,332 INFO L87 Difference]: Start difference. First operand 182 states and 486 transitions. Second operand 18 states. [2020-12-22 10:32:14,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:14,739 INFO L93 Difference]: Finished difference Result 346 states and 844 transitions. [2020-12-22 10:32:14,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:32:14,740 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:32:14,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:14,741 INFO L225 Difference]: With dead ends: 346 [2020-12-22 10:32:14,741 INFO L226 Difference]: Without dead ends: 334 [2020-12-22 10:32:14,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=459, Invalid=1101, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:32:14,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-12-22 10:32:14,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 177. [2020-12-22 10:32:14,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 10:32:14,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 470 transitions. [2020-12-22 10:32:14,750 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 470 transitions. Word has length 14 [2020-12-22 10:32:14,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:14,751 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 470 transitions. [2020-12-22 10:32:14,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:32:14,751 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 470 transitions. [2020-12-22 10:32:14,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:32:14,751 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:14,751 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:14,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-12-22 10:32:14,952 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:14,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:14,953 INFO L82 PathProgramCache]: Analyzing trace with hash -342809605, now seen corresponding path program 136 times [2020-12-22 10:32:14,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:14,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771986107] [2020-12-22 10:32:14,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:14,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:15,112 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:15,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771986107] [2020-12-22 10:32:15,112 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232660163] [2020-12-22 10:32:15,113 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:15,176 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:32:15,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:15,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:32:15,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:15,487 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:15,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:15,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:32:15,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774131073] [2020-12-22 10:32:15,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:32:15,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:15,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:32:15,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:32:15,489 INFO L87 Difference]: Start difference. First operand 177 states and 470 transitions. Second operand 17 states. [2020-12-22 10:32:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:16,091 INFO L93 Difference]: Finished difference Result 257 states and 631 transitions. [2020-12-22 10:32:16,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:32:16,093 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:32:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:16,093 INFO L225 Difference]: With dead ends: 257 [2020-12-22 10:32:16,093 INFO L226 Difference]: Without dead ends: 255 [2020-12-22 10:32:16,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:32:16,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-22 10:32:16,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 175. [2020-12-22 10:32:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 10:32:16,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 465 transitions. [2020-12-22 10:32:16,097 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 465 transitions. Word has length 14 [2020-12-22 10:32:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:16,097 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 465 transitions. [2020-12-22 10:32:16,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:32:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 465 transitions. [2020-12-22 10:32:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:32:16,098 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:16,098 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:16,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:16,299 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:16,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:16,299 INFO L82 PathProgramCache]: Analyzing trace with hash -324041275, now seen corresponding path program 137 times [2020-12-22 10:32:16,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:16,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423657171] [2020-12-22 10:32:16,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:16,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:16,457 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:16,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423657171] [2020-12-22 10:32:16,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558130349] [2020-12-22 10:32:16,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:16,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:32:16,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:16,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:32:16,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:16,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:16,865 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:16,865 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:32:16,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374723181] [2020-12-22 10:32:16,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:32:16,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:16,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:32:16,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:32:16,867 INFO L87 Difference]: Start difference. First operand 175 states and 465 transitions. Second operand 17 states. [2020-12-22 10:32:17,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:17,564 INFO L93 Difference]: Finished difference Result 264 states and 645 transitions. [2020-12-22 10:32:17,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:32:17,566 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:32:17,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:17,567 INFO L225 Difference]: With dead ends: 264 [2020-12-22 10:32:17,567 INFO L226 Difference]: Without dead ends: 262 [2020-12-22 10:32:17,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:32:17,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-22 10:32:17,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 177. [2020-12-22 10:32:17,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-22 10:32:17,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 472 transitions. [2020-12-22 10:32:17,570 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 472 transitions. Word has length 14 [2020-12-22 10:32:17,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:17,570 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 472 transitions. [2020-12-22 10:32:17,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:32:17,570 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 472 transitions. [2020-12-22 10:32:17,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:32:17,571 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:17,571 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:17,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:17,772 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:17,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:17,772 INFO L82 PathProgramCache]: Analyzing trace with hash -323349355, now seen corresponding path program 138 times [2020-12-22 10:32:17,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:17,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802510268] [2020-12-22 10:32:17,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:17,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:17,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:17,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802510268] [2020-12-22 10:32:17,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [916839418] [2020-12-22 10:32:17,930 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:17,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:32:17,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:32:17,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:32:17,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:18,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:18,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:18,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-22 10:32:18,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163283196] [2020-12-22 10:32:18,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:32:18,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:18,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:32:18,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:32:18,324 INFO L87 Difference]: Start difference. First operand 177 states and 472 transitions. Second operand 17 states. [2020-12-22 10:32:19,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:19,132 INFO L93 Difference]: Finished difference Result 272 states and 668 transitions. [2020-12-22 10:32:19,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:32:19,134 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-22 10:32:19,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:19,135 INFO L225 Difference]: With dead ends: 272 [2020-12-22 10:32:19,135 INFO L226 Difference]: Without dead ends: 270 [2020-12-22 10:32:19,135 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:32:19,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-12-22 10:32:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 179. [2020-12-22 10:32:19,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-22 10:32:19,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 479 transitions. [2020-12-22 10:32:19,140 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 479 transitions. Word has length 14 [2020-12-22 10:32:19,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:19,141 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 479 transitions. [2020-12-22 10:32:19,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:32:19,141 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 479 transitions. [2020-12-22 10:32:19,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:32:19,141 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:19,141 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:32:19,353 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:19,354 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:32:19,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:32:19,354 INFO L82 PathProgramCache]: Analyzing trace with hash -323329918, now seen corresponding path program 139 times [2020-12-22 10:32:19,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:32:19,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297381926] [2020-12-22 10:32:19,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:32:19,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:19,510 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:19,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297381926] [2020-12-22 10:32:19,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305021566] [2020-12-22 10:32:19,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:32:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:32:19,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:32:19,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:32:19,866 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:32:19,868 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-22 10:32:19,868 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:32:19,926 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:32:19,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:32:19,926 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-22 10:32:19,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366366135] [2020-12-22 10:32:19,926 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:32:19,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:32:19,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:32:19,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:32:19,927 INFO L87 Difference]: Start difference. First operand 179 states and 479 transitions. Second operand 18 states. [2020-12-22 10:32:21,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:32:21,262 INFO L93 Difference]: Finished difference Result 344 states and 844 transitions. [2020-12-22 10:32:21,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:32:21,264 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-22 10:32:21,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:32:21,265 INFO L225 Difference]: With dead ends: 344 [2020-12-22 10:32:21,265 INFO L226 Difference]: Without dead ends: 332 [2020-12-22 10:32:21,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=417, Invalid=989, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:32:21,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-12-22 10:32:21,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 175. [2020-12-22 10:32:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-22 10:32:21,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 465 transitions. [2020-12-22 10:32:21,269 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 465 transitions. Word has length 14 [2020-12-22 10:32:21,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:32:21,269 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 465 transitions. [2020-12-22 10:32:21,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:32:21,269 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 465 transitions. [2020-12-22 10:32:21,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:32:21,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:32:21,270 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1]