/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-bitabs-dcfa08f [2020-12-23 13:00:23,820 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 13:00:23,823 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 13:00:23,858 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 13:00:23,859 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 13:00:23,861 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 13:00:23,862 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 13:00:23,865 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 13:00:23,880 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 13:00:23,883 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 13:00:23,885 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 13:00:23,886 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 13:00:23,887 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 13:00:23,888 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 13:00:23,889 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 13:00:23,890 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 13:00:23,892 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 13:00:23,893 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 13:00:23,895 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 13:00:23,897 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 13:00:23,899 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 13:00:23,902 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 13:00:23,905 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 13:00:23,907 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 13:00:23,915 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 13:00:23,916 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 13:00:23,918 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 13:00:23,919 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 13:00:23,920 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 13:00:23,925 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 13:00:23,926 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 13:00:23,927 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 13:00:23,928 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 13:00:23,929 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 13:00:23,932 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 13:00:23,932 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 13:00:23,933 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 13:00:23,933 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 13:00:23,937 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 13:00:23,938 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 13:00:23,943 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 13:00:23,944 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-23 13:00:23,992 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 13:00:23,992 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 13:00:23,997 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 13:00:23,997 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 13:00:23,997 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 13:00:23,998 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 13:00:23,998 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 13:00:23,998 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 13:00:23,998 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 13:00:23,999 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 13:00:24,000 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 13:00:24,000 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 13:00:24,000 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 13:00:24,000 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 13:00:24,001 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 13:00:24,001 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 13:00:24,001 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 13:00:24,001 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 13:00:24,002 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 13:00:24,002 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 13:00:24,002 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 13:00:24,002 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 13:00:24,003 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 13:00:24,003 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 13:00:24,003 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 13:00:24,003 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 13:00:24,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 13:00:24,439 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 13:00:24,442 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 13:00:24,443 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 13:00:24,444 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 13:00:24,445 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_bench_longest-1.i [2020-12-23 13:00:24,535 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cc5d87bb9/c6bc7130f65c4deab3e29c78f1b15f9d/FLAG4ec5c8edd [2020-12-23 13:00:25,315 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 13:00:25,315 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-1.i [2020-12-23 13:00:25,340 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cc5d87bb9/c6bc7130f65c4deab3e29c78f1b15f9d/FLAG4ec5c8edd [2020-12-23 13:00:25,559 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/cc5d87bb9/c6bc7130f65c4deab3e29c78f1b15f9d [2020-12-23 13:00:25,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 13:00:25,563 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 13:00:25,567 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 13:00:25,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 13:00:25,571 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 13:00:25,572 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:00:25" (1/1) ... [2020-12-23 13:00:25,573 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@379e0fba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:25, skipping insertion in model container [2020-12-23 13:00:25,573 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:00:25" (1/1) ... [2020-12-23 13:00:25,582 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 13:00:25,646 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-23 13:00:25,971 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-1.i[30286,30299] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~1,] [2020-12-23 13:00:25,990 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-1.i[31038,31051] [2020-12-23 13:00:25,992 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 13:00:26,000 INFO L203 MainTranslator]: Completed pre-run [2020-12-23 13:00:26,037 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-1.i[30286,30299] left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~1,] [2020-12-23 13:00:26,043 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longest-1.i[31038,31051] [2020-12-23 13:00:26,044 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 13:00:26,188 INFO L208 MainTranslator]: Completed translation [2020-12-23 13:00:26,189 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:26 WrapperNode [2020-12-23 13:00:26,189 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 13:00:26,191 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 13:00:26,191 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 13:00:26,192 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 13:00:26,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:26" (1/1) ... [2020-12-23 13:00:26,215 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:26" (1/1) ... [2020-12-23 13:00:26,235 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 13:00:26,236 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 13:00:26,236 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 13:00:26,237 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 13:00:26,245 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:26" (1/1) ... [2020-12-23 13:00:26,246 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:26" (1/1) ... [2020-12-23 13:00:26,249 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:26" (1/1) ... [2020-12-23 13:00:26,249 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:26" (1/1) ... [2020-12-23 13:00:26,255 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:26" (1/1) ... [2020-12-23 13:00:26,259 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:26" (1/1) ... [2020-12-23 13:00:26,261 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:26" (1/1) ... [2020-12-23 13:00:26,264 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 13:00:26,265 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 13:00:26,265 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 13:00:26,265 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 13:00:26,266 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:26" (1/1) ... No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 13:00:26,352 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-23 13:00:26,353 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-23 13:00:26,353 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-23 13:00:26,353 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-23 13:00:26,354 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 13:00:26,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-23 13:00:26,355 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 13:00:26,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 13:00:26,355 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 13:00:26,355 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-23 13:00:26,355 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 13:00:26,356 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 13:00:26,357 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-23 13:00:26,809 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 13:00:26,810 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-23 13:00:26,812 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:00:26 BoogieIcfgContainer [2020-12-23 13:00:26,812 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 13:00:26,813 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 13:00:26,813 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 13:00:26,817 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 13:00:26,817 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:00:25" (1/3) ... [2020-12-23 13:00:26,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74da8142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:00:26, skipping insertion in model container [2020-12-23 13:00:26,818 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:26" (2/3) ... [2020-12-23 13:00:26,818 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74da8142 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:00:26, skipping insertion in model container [2020-12-23 13:00:26,819 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:00:26" (3/3) ... [2020-12-23 13:00:26,820 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-12-23 13:00:26,827 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-23 13:00:26,827 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 13:00:26,833 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 13:00:26,834 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-23 13:00:26,865 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,865 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,866 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,866 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,866 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,866 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,866 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,867 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,867 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,867 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,867 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,868 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,868 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,868 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,868 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,868 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,869 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,869 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,869 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,869 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,870 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,870 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,870 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,870 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,870 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,871 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,871 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,871 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,871 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,871 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,872 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,872 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,872 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,872 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,873 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,873 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,873 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,873 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,873 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,874 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,874 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,874 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,874 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,875 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,875 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,875 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,875 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,875 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,876 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,876 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,876 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,876 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,877 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,877 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,877 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,877 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,877 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,878 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,878 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,878 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,880 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,881 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,881 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,881 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,881 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,882 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,887 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,888 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,888 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,888 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,888 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,888 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:26,891 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-23 13:00:26,911 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-23 13:00:26,934 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 13:00:26,935 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 13:00:26,935 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 13:00:26,935 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 13:00:26,935 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 13:00:26,935 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 13:00:26,935 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 13:00:26,936 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 13:00:26,948 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-23 13:00:26,950 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 62 transitions, 134 flow [2020-12-23 13:00:26,954 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 62 transitions, 134 flow [2020-12-23 13:00:26,956 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 64 places, 62 transitions, 134 flow [2020-12-23 13:00:26,997 INFO L129 PetriNetUnfolder]: 5/60 cut-off events. [2020-12-23 13:00:26,997 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-23 13:00:27,002 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. [2020-12-23 13:00:27,008 INFO L116 LiptonReduction]: Number of co-enabled transitions 1080 [2020-12-23 13:00:29,136 WARN L197 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-23 13:00:29,928 WARN L197 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-12-23 13:00:30,069 WARN L197 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-23 13:00:30,382 WARN L197 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-12-23 13:00:30,504 WARN L197 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-23 13:00:30,510 INFO L131 LiptonReduction]: Checked pairs total: 1148 [2020-12-23 13:00:30,510 INFO L133 LiptonReduction]: Total number of compositions: 55 [2020-12-23 13:00:30,517 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-12-23 13:00:30,526 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-12-23 13:00:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-23 13:00:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 13:00:30,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:30,534 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 13:00:30,534 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:30,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:30,540 INFO L82 PathProgramCache]: Analyzing trace with hash -1040753464, now seen corresponding path program 1 times [2020-12-23 13:00:30,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:30,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731890497] [2020-12-23 13:00:30,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:30,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:30,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:30,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731890497] [2020-12-23 13:00:30,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:30,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 13:00:30,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667387159] [2020-12-23 13:00:30,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 13:00:30,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:30,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 13:00:30,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 13:00:30,832 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-12-23 13:00:30,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:30,895 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-12-23 13:00:30,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 13:00:30,897 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 13:00:30,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:30,908 INFO L225 Difference]: With dead ends: 83 [2020-12-23 13:00:30,908 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 13:00:30,909 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 [2020-12-23 13:00:30,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 13:00:30,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-12-23 13:00:30,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 13:00:30,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-12-23 13:00:30,951 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-12-23 13:00:30,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:30,952 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-12-23 13:00:30,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 13:00:30,952 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-12-23 13:00:30,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 13:00:30,953 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:30,953 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:30,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 13:00:30,954 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:30,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:30,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1204102091, now seen corresponding path program 1 times [2020-12-23 13:00:30,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:30,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760216796] [2020-12-23 13:00:30,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:30,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:31,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:31,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760216796] [2020-12-23 13:00:31,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:31,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:00:31,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616516065] [2020-12-23 13:00:31,085 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 13:00:31,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:31,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 13:00:31,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:00:31,089 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-12-23 13:00:31,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:31,162 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-12-23 13:00:31,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:00:31,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 13:00:31,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:31,169 INFO L225 Difference]: With dead ends: 80 [2020-12-23 13:00:31,169 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 13:00:31,170 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 [2020-12-23 13:00:31,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 13:00:31,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-12-23 13:00:31,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 13:00:31,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-12-23 13:00:31,196 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-12-23 13:00:31,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:31,197 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-12-23 13:00:31,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 13:00:31,201 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-12-23 13:00:31,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 13:00:31,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:31,203 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:31,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 13:00:31,203 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:31,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:31,205 INFO L82 PathProgramCache]: Analyzing trace with hash 563301308, now seen corresponding path program 1 times [2020-12-23 13:00:31,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:31,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118159115] [2020-12-23 13:00:31,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:31,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:31,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:31,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118159115] [2020-12-23 13:00:31,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:31,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:00:31,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370981042] [2020-12-23 13:00:31,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 13:00:31,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:31,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 13:00:31,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:00:31,297 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-12-23 13:00:31,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:31,321 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-12-23 13:00:31,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 13:00:31,322 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 13:00:31,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:31,323 INFO L225 Difference]: With dead ends: 73 [2020-12-23 13:00:31,323 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 13:00:31,324 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 [2020-12-23 13:00:31,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 13:00:31,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-12-23 13:00:31,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 13:00:31,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-12-23 13:00:31,332 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-12-23 13:00:31,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:31,333 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-12-23 13:00:31,333 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 13:00:31,333 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-12-23 13:00:31,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 13:00:31,334 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:31,334 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:31,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 13:00:31,335 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:31,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:31,335 INFO L82 PathProgramCache]: Analyzing trace with hash 563669588, now seen corresponding path program 2 times [2020-12-23 13:00:31,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:31,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109570098] [2020-12-23 13:00:31,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:31,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:31,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109570098] [2020-12-23 13:00:31,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:31,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:00:31,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283819858] [2020-12-23 13:00:31,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 13:00:31,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:31,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 13:00:31,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:00:31,460 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-12-23 13:00:31,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:31,525 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-12-23 13:00:31,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:00:31,526 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 13:00:31,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:31,528 INFO L225 Difference]: With dead ends: 86 [2020-12-23 13:00:31,528 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 13:00:31,528 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 [2020-12-23 13:00:31,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 13:00:31,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-12-23 13:00:31,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 13:00:31,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-12-23 13:00:31,550 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-12-23 13:00:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:31,550 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-12-23 13:00:31,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 13:00:31,551 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-12-23 13:00:31,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 13:00:31,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:31,552 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:31,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 13:00:31,553 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:31,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:31,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1304831828, now seen corresponding path program 2 times [2020-12-23 13:00:31,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:31,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568433437] [2020-12-23 13:00:31,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:31,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:31,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:31,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568433437] [2020-12-23 13:00:31,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091328585] [2020-12-23 13:00:31,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:31,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:31,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:31,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:00:31,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:31,835 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:31,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:31,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:31,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-12-23 13:00:31,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416005525] [2020-12-23 13:00:31,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 13:00:31,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:31,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 13:00:31,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:00:31,859 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-12-23 13:00:31,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:31,970 INFO L93 Difference]: Finished difference Result 121 states and 281 transitions. [2020-12-23 13:00:31,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:00:31,970 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-12-23 13:00:31,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:31,972 INFO L225 Difference]: With dead ends: 121 [2020-12-23 13:00:31,972 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 13:00:31,972 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 [2020-12-23 13:00:31,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 13:00:31,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 76. [2020-12-23 13:00:31,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 13:00:31,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-12-23 13:00:31,980 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 9 [2020-12-23 13:00:31,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:31,980 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-12-23 13:00:31,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 13:00:31,980 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-12-23 13:00:31,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 13:00:31,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:31,982 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:32,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:32,196 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:32,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:32,197 INFO L82 PathProgramCache]: Analyzing trace with hash 282471732, now seen corresponding path program 3 times [2020-12-23 13:00:32,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:32,198 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443493684] [2020-12-23 13:00:32,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:32,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:32,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:32,315 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443493684] [2020-12-23 13:00:32,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471422584] [2020-12-23 13:00:32,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:32,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:32,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:32,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:00:32,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:32,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:32,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:32,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-23 13:00:32,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772735812] [2020-12-23 13:00:32,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:00:32,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:32,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:00:32,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:00:32,459 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 9 states. [2020-12-23 13:00:32,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:32,517 INFO L93 Difference]: Finished difference Result 89 states and 215 transitions. [2020-12-23 13:00:32,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 13:00:32,518 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-23 13:00:32,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:32,519 INFO L225 Difference]: With dead ends: 89 [2020-12-23 13:00:32,519 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 13:00:32,519 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 [2020-12-23 13:00:32,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 13:00:32,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2020-12-23 13:00:32,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 13:00:32,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-12-23 13:00:32,543 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 9 [2020-12-23 13:00:32,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:32,543 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-12-23 13:00:32,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:00:32,544 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-12-23 13:00:32,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 13:00:32,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:32,545 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:32,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:32,761 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:32,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:32,763 INFO L82 PathProgramCache]: Analyzing trace with hash 293888412, now seen corresponding path program 4 times [2020-12-23 13:00:32,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:32,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549894629] [2020-12-23 13:00:32,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:32,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:32,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:32,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549894629] [2020-12-23 13:00:32,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676923676] [2020-12-23 13:00:32,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:32,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:32,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:32,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:00:32,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:33,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:33,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:33,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-23 13:00:33,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520901355] [2020-12-23 13:00:33,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:00:33,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:33,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:00:33,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:00:33,016 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 9 states. [2020-12-23 13:00:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:33,075 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-12-23 13:00:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:00:33,076 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-23 13:00:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:33,077 INFO L225 Difference]: With dead ends: 95 [2020-12-23 13:00:33,077 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 13:00:33,077 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 [2020-12-23 13:00:33,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 13:00:33,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-12-23 13:00:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 13:00:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 202 transitions. [2020-12-23 13:00:33,083 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 202 transitions. Word has length 9 [2020-12-23 13:00:33,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:33,083 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 202 transitions. [2020-12-23 13:00:33,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:00:33,083 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 202 transitions. [2020-12-23 13:00:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 13:00:33,084 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:33,085 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:33,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:33,298 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:33,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:33,299 INFO L82 PathProgramCache]: Analyzing trace with hash 293910732, now seen corresponding path program 5 times [2020-12-23 13:00:33,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:33,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497273350] [2020-12-23 13:00:33,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:33,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:33,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:33,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497273350] [2020-12-23 13:00:33,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255307829] [2020-12-23 13:00:33,386 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:33,461 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:33,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:33,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:00:33,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:33,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:33,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:33,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-23 13:00:33,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922612910] [2020-12-23 13:00:33,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:00:33,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:33,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:00:33,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:00:33,546 INFO L87 Difference]: Start difference. First operand 81 states and 202 transitions. Second operand 9 states. [2020-12-23 13:00:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:33,635 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-12-23 13:00:33,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:33,636 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-23 13:00:33,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:33,637 INFO L225 Difference]: With dead ends: 104 [2020-12-23 13:00:33,637 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 13:00:33,638 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 [2020-12-23 13:00:33,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 13:00:33,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-12-23 13:00:33,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 13:00:33,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 206 transitions. [2020-12-23 13:00:33,643 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 206 transitions. Word has length 9 [2020-12-23 13:00:33,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:33,643 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 206 transitions. [2020-12-23 13:00:33,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:00:33,643 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 206 transitions. [2020-12-23 13:00:33,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:33,644 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:33,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:33,858 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:33,859 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:33,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:33,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1795907071, now seen corresponding path program 1 times [2020-12-23 13:00:33,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:33,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067820668] [2020-12-23 13:00:33,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:33,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:33,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:33,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067820668] [2020-12-23 13:00:33,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:33,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:00:33,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379787940] [2020-12-23 13:00:33,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:00:33,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:33,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:00:33,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:00:33,962 INFO L87 Difference]: Start difference. First operand 82 states and 206 transitions. Second operand 6 states. [2020-12-23 13:00:34,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:34,018 INFO L93 Difference]: Finished difference Result 101 states and 242 transitions. [2020-12-23 13:00:34,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:00:34,019 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:00:34,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:34,020 INFO L225 Difference]: With dead ends: 101 [2020-12-23 13:00:34,020 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 13:00:34,020 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 [2020-12-23 13:00:34,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 13:00:34,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2020-12-23 13:00:34,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 13:00:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 216 transitions. [2020-12-23 13:00:34,026 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 216 transitions. Word has length 10 [2020-12-23 13:00:34,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:34,026 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 216 transitions. [2020-12-23 13:00:34,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:00:34,026 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 216 transitions. [2020-12-23 13:00:34,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:34,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:34,028 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:34,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 13:00:34,028 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:34,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:34,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1796275351, now seen corresponding path program 2 times [2020-12-23 13:00:34,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:34,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165387745] [2020-12-23 13:00:34,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:34,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:34,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165387745] [2020-12-23 13:00:34,086 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:34,086 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:00:34,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456322608] [2020-12-23 13:00:34,086 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:00:34,086 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:34,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:00:34,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:00:34,087 INFO L87 Difference]: Start difference. First operand 88 states and 216 transitions. Second operand 6 states. [2020-12-23 13:00:34,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:34,186 INFO L93 Difference]: Finished difference Result 116 states and 272 transitions. [2020-12-23 13:00:34,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:34,187 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:00:34,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:34,189 INFO L225 Difference]: With dead ends: 116 [2020-12-23 13:00:34,189 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 13:00:34,190 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 [2020-12-23 13:00:34,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 13:00:34,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2020-12-23 13:00:34,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 13:00:34,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 214 transitions. [2020-12-23 13:00:34,194 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 214 transitions. Word has length 10 [2020-12-23 13:00:34,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:34,195 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 214 transitions. [2020-12-23 13:00:34,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:00:34,195 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 214 transitions. [2020-12-23 13:00:34,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:34,196 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:34,196 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:34,196 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 13:00:34,196 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:34,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:34,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1458823941, now seen corresponding path program 3 times [2020-12-23 13:00:34,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:34,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554680649] [2020-12-23 13:00:34,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:34,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:34,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554680649] [2020-12-23 13:00:34,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:34,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:00:34,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381631210] [2020-12-23 13:00:34,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:00:34,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:34,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:00:34,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:00:34,254 INFO L87 Difference]: Start difference. First operand 87 states and 214 transitions. Second operand 6 states. [2020-12-23 13:00:34,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:34,335 INFO L93 Difference]: Finished difference Result 110 states and 262 transitions. [2020-12-23 13:00:34,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:34,335 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:00:34,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:34,337 INFO L225 Difference]: With dead ends: 110 [2020-12-23 13:00:34,337 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 13:00:34,337 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 [2020-12-23 13:00:34,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 13:00:34,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2020-12-23 13:00:34,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 13:00:34,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-12-23 13:00:34,341 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-12-23 13:00:34,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:34,342 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-12-23 13:00:34,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:00:34,342 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-12-23 13:00:34,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:34,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:34,343 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:34,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 13:00:34,343 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:34,344 INFO L82 PathProgramCache]: Analyzing trace with hash 166689468, now seen corresponding path program 6 times [2020-12-23 13:00:34,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:34,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204049091] [2020-12-23 13:00:34,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:34,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:34,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204049091] [2020-12-23 13:00:34,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247353337] [2020-12-23 13:00:34,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:34,487 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:34,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:34,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:34,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:34,584 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:34,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:34,584 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:34,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738598027] [2020-12-23 13:00:34,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:34,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:34,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:34,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:34,586 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-12-23 13:00:34,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:34,623 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-12-23 13:00:34,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:00:34,624 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-12-23 13:00:34,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:34,625 INFO L225 Difference]: With dead ends: 108 [2020-12-23 13:00:34,625 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 13:00:34,626 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 [2020-12-23 13:00:34,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 13:00:34,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-12-23 13:00:34,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 13:00:34,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-12-23 13:00:34,630 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-12-23 13:00:34,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:34,630 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-12-23 13:00:34,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:34,630 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-12-23 13:00:34,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:34,631 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:34,631 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:34,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 13:00:34,846 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:34,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:34,847 INFO L82 PathProgramCache]: Analyzing trace with hash 520606548, now seen corresponding path program 7 times [2020-12-23 13:00:34,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:34,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484556264] [2020-12-23 13:00:34,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:34,916 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:34,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484556264] [2020-12-23 13:00:34,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1278799350] [2020-12-23 13:00:34,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:34,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:34,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:34,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:35,072 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:35,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:35,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:35,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601380220] [2020-12-23 13:00:35,073 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:35,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:35,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:35,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:35,074 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-12-23 13:00:35,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:35,121 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-12-23 13:00:35,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:00:35,121 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-12-23 13:00:35,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:35,122 INFO L225 Difference]: With dead ends: 116 [2020-12-23 13:00:35,123 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 13:00:35,123 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:00:35,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 13:00:35,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-12-23 13:00:35,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 13:00:35,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-12-23 13:00:35,127 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-12-23 13:00:35,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:35,127 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-12-23 13:00:35,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:35,128 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-12-23 13:00:35,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:35,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:35,128 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:35,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:35,342 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:35,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:35,343 INFO L82 PathProgramCache]: Analyzing trace with hash 521298468, now seen corresponding path program 8 times [2020-12-23 13:00:35,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:35,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401907656] [2020-12-23 13:00:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:35,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:35,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:35,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401907656] [2020-12-23 13:00:35,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972398395] [2020-12-23 13:00:35,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:35,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:35,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:35,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:35,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:35,623 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:35,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:35,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:35,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139343456] [2020-12-23 13:00:35,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:35,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:35,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:35,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:35,625 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-12-23 13:00:35,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:35,705 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-12-23 13:00:35,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:35,705 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-12-23 13:00:35,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:35,707 INFO L225 Difference]: With dead ends: 115 [2020-12-23 13:00:35,707 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 13:00:35,707 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 [2020-12-23 13:00:35,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 13:00:35,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-12-23 13:00:35,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 13:00:35,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-12-23 13:00:35,711 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-12-23 13:00:35,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:35,712 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-12-23 13:00:35,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:35,712 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-12-23 13:00:35,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:35,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:35,713 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:35,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 13:00:35,927 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:35,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:35,928 INFO L82 PathProgramCache]: Analyzing trace with hash 521320788, now seen corresponding path program 9 times [2020-12-23 13:00:35,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:35,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205556065] [2020-12-23 13:00:35,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:35,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:36,029 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:36,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205556065] [2020-12-23 13:00:36,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747515103] [2020-12-23 13:00:36,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:36,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:36,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:36,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:36,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:36,204 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:36,205 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:36,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:36,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398247299] [2020-12-23 13:00:36,206 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:36,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:36,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:36,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:36,208 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-12-23 13:00:36,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:36,316 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-12-23 13:00:36,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:00:36,316 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-12-23 13:00:36,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:36,319 INFO L225 Difference]: With dead ends: 124 [2020-12-23 13:00:36,320 INFO L226 Difference]: Without dead ends: 118 [2020-12-23 13:00:36,322 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 [2020-12-23 13:00:36,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-23 13:00:36,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-12-23 13:00:36,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 13:00:36,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-12-23 13:00:36,327 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-12-23 13:00:36,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:36,328 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-12-23 13:00:36,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:36,328 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-12-23 13:00:36,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:36,329 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:36,329 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:36,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 13:00:36,543 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:36,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:36,544 INFO L82 PathProgramCache]: Analyzing trace with hash 913752204, now seen corresponding path program 3 times [2020-12-23 13:00:36,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:36,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846153505] [2020-12-23 13:00:36,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:36,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846153505] [2020-12-23 13:00:36,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124986049] [2020-12-23 13:00:36,635 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:36,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:00:36,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:36,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:36,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:36,852 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:36,878 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:36,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:36,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:36,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149720666] [2020-12-23 13:00:36,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:36,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:36,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:36,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:36,881 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 14 states. [2020-12-23 13:00:37,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:37,065 INFO L93 Difference]: Finished difference Result 161 states and 377 transitions. [2020-12-23 13:00:37,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:00:37,065 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-23 13:00:37,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:37,067 INFO L225 Difference]: With dead ends: 161 [2020-12-23 13:00:37,067 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 13:00:37,068 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 [2020-12-23 13:00:37,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 13:00:37,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 104. [2020-12-23 13:00:37,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-23 13:00:37,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 264 transitions. [2020-12-23 13:00:37,073 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 264 transitions. Word has length 11 [2020-12-23 13:00:37,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:37,073 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 264 transitions. [2020-12-23 13:00:37,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:37,074 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 264 transitions. [2020-12-23 13:00:37,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:37,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:37,075 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:37,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 13:00:37,289 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:37,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:37,290 INFO L82 PathProgramCache]: Analyzing trace with hash 187063968, now seen corresponding path program 4 times [2020-12-23 13:00:37,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:37,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933208536] [2020-12-23 13:00:37,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:37,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:37,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933208536] [2020-12-23 13:00:37,395 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [140618023] [2020-12-23 13:00:37,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:37,464 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:37,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:37,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:37,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:37,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:37,571 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:37,571 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936239455] [2020-12-23 13:00:37,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:37,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:37,572 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:37,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:37,573 INFO L87 Difference]: Start difference. First operand 104 states and 264 transitions. Second operand 11 states. [2020-12-23 13:00:37,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:37,664 INFO L93 Difference]: Finished difference Result 126 states and 306 transitions. [2020-12-23 13:00:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:37,665 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:37,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:37,667 INFO L225 Difference]: With dead ends: 126 [2020-12-23 13:00:37,667 INFO L226 Difference]: Without dead ends: 124 [2020-12-23 13:00:37,667 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 [2020-12-23 13:00:37,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-23 13:00:37,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 110. [2020-12-23 13:00:37,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 13:00:37,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 276 transitions. [2020-12-23 13:00:37,672 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 276 transitions. Word has length 11 [2020-12-23 13:00:37,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:37,672 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 276 transitions. [2020-12-23 13:00:37,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:37,672 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 276 transitions. [2020-12-23 13:00:37,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:37,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:37,673 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:37,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 13:00:37,887 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:37,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:37,888 INFO L82 PathProgramCache]: Analyzing trace with hash 187432248, now seen corresponding path program 5 times [2020-12-23 13:00:37,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:37,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241928735] [2020-12-23 13:00:37,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:37,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:37,954 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:37,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241928735] [2020-12-23 13:00:37,954 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462247708] [2020-12-23 13:00:37,954 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:38,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:38,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:38,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:38,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:38,097 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:00:38,101 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:00:38,106 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:38,118 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:38,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:38,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:38,118 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612977307] [2020-12-23 13:00:38,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:38,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:38,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:38,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:38,120 INFO L87 Difference]: Start difference. First operand 110 states and 276 transitions. Second operand 11 states. [2020-12-23 13:00:38,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:38,334 INFO L93 Difference]: Finished difference Result 155 states and 373 transitions. [2020-12-23 13:00:38,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:00:38,334 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:38,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:38,336 INFO L225 Difference]: With dead ends: 155 [2020-12-23 13:00:38,359 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 13:00:38,361 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 [2020-12-23 13:00:38,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 13:00:38,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 106. [2020-12-23 13:00:38,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-23 13:00:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 270 transitions. [2020-12-23 13:00:38,370 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 270 transitions. Word has length 11 [2020-12-23 13:00:38,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:38,370 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 270 transitions. [2020-12-23 13:00:38,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:38,370 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 270 transitions. [2020-12-23 13:00:38,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:38,371 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:38,371 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:38,584 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 13:00:38,585 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:38,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:38,586 INFO L82 PathProgramCache]: Analyzing trace with hash -161455279, now seen corresponding path program 6 times [2020-12-23 13:00:38,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:38,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773409569] [2020-12-23 13:00:38,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:38,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:38,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773409569] [2020-12-23 13:00:38,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098975654] [2020-12-23 13:00:38,671 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:38,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:38,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:38,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:38,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:38,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:38,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:38,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713865455] [2020-12-23 13:00:38,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:38,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:38,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:38,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:38,831 INFO L87 Difference]: Start difference. First operand 106 states and 270 transitions. Second operand 11 states. [2020-12-23 13:00:38,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:38,935 INFO L93 Difference]: Finished difference Result 136 states and 326 transitions. [2020-12-23 13:00:38,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:00:38,935 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:38,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:38,936 INFO L225 Difference]: With dead ends: 136 [2020-12-23 13:00:38,937 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 13:00:38,937 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 [2020-12-23 13:00:38,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 13:00:38,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 111. [2020-12-23 13:00:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 13:00:38,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 277 transitions. [2020-12-23 13:00:38,941 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 277 transitions. Word has length 11 [2020-12-23 13:00:38,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:38,941 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 277 transitions. [2020-12-23 13:00:38,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:38,942 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 277 transitions. [2020-12-23 13:00:38,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:38,942 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:38,943 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:39,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:39,159 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:39,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:39,160 INFO L82 PathProgramCache]: Analyzing trace with hash -150038599, now seen corresponding path program 7 times [2020-12-23 13:00:39,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:39,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823679015] [2020-12-23 13:00:39,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:39,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823679015] [2020-12-23 13:00:39,227 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1823930076] [2020-12-23 13:00:39,227 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:39,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:39,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:39,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:39,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:39,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:39,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:39,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737422478] [2020-12-23 13:00:39,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:39,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:39,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:39,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:39,365 INFO L87 Difference]: Start difference. First operand 111 states and 277 transitions. Second operand 11 states. [2020-12-23 13:00:39,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:39,479 INFO L93 Difference]: Finished difference Result 137 states and 330 transitions. [2020-12-23 13:00:39,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:00:39,479 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:39,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:39,480 INFO L225 Difference]: With dead ends: 137 [2020-12-23 13:00:39,480 INFO L226 Difference]: Without dead ends: 135 [2020-12-23 13:00:39,481 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 [2020-12-23 13:00:39,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-12-23 13:00:39,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 113. [2020-12-23 13:00:39,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 13:00:39,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 284 transitions. [2020-12-23 13:00:39,485 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 284 transitions. Word has length 11 [2020-12-23 13:00:39,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:39,485 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 284 transitions. [2020-12-23 13:00:39,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:39,486 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 284 transitions. [2020-12-23 13:00:39,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:39,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:39,486 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:39,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-12-23 13:00:39,700 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:39,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:39,701 INFO L82 PathProgramCache]: Analyzing trace with hash -150016279, now seen corresponding path program 8 times [2020-12-23 13:00:39,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:39,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690689164] [2020-12-23 13:00:39,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:39,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:39,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690689164] [2020-12-23 13:00:39,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562814699] [2020-12-23 13:00:39,765 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:39,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:39,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:39,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:39,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:39,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:39,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:39,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:39,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567064390] [2020-12-23 13:00:39,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:39,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:39,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:39,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:39,904 INFO L87 Difference]: Start difference. First operand 113 states and 284 transitions. Second operand 11 states. [2020-12-23 13:00:40,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:40,166 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-12-23 13:00:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:00:40,167 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:40,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:40,168 INFO L225 Difference]: With dead ends: 160 [2020-12-23 13:00:40,168 INFO L226 Difference]: Without dead ends: 152 [2020-12-23 13:00:40,169 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 [2020-12-23 13:00:40,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-12-23 13:00:40,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 111. [2020-12-23 13:00:40,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-12-23 13:00:40,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 280 transitions. [2020-12-23 13:00:40,174 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 280 transitions. Word has length 11 [2020-12-23 13:00:40,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:40,174 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 280 transitions. [2020-12-23 13:00:40,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:40,174 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 280 transitions. [2020-12-23 13:00:40,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:40,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:40,175 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:40,388 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:40,389 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:40,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:40,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1919347069, now seen corresponding path program 9 times [2020-12-23 13:00:40,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:40,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655440840] [2020-12-23 13:00:40,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:40,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:40,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:40,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655440840] [2020-12-23 13:00:40,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946669779] [2020-12-23 13:00:40,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:40,514 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:40,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:40,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:40,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:40,596 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:40,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:40,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:40,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468321556] [2020-12-23 13:00:40,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:40,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:40,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:40,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:40,598 INFO L87 Difference]: Start difference. First operand 111 states and 280 transitions. Second operand 11 states. [2020-12-23 13:00:40,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:40,668 INFO L93 Difference]: Finished difference Result 136 states and 330 transitions. [2020-12-23 13:00:40,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:00:40,669 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:40,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:40,670 INFO L225 Difference]: With dead ends: 136 [2020-12-23 13:00:40,670 INFO L226 Difference]: Without dead ends: 134 [2020-12-23 13:00:40,671 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 [2020-12-23 13:00:40,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-23 13:00:40,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 112. [2020-12-23 13:00:40,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 13:00:40,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 282 transitions. [2020-12-23 13:00:40,675 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 282 transitions. Word has length 11 [2020-12-23 13:00:40,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:40,675 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 282 transitions. [2020-12-23 13:00:40,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:40,675 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 282 transitions. [2020-12-23 13:00:40,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:40,676 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:40,676 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:40,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 13:00:40,890 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:40,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:40,891 INFO L82 PathProgramCache]: Analyzing trace with hash -2021703147, now seen corresponding path program 10 times [2020-12-23 13:00:40,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:40,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87501833] [2020-12-23 13:00:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:40,949 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:40,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87501833] [2020-12-23 13:00:40,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346930257] [2020-12-23 13:00:40,949 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:41,006 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:41,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:41,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:41,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:41,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:41,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:41,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373835412] [2020-12-23 13:00:41,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:41,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:41,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:41,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:41,078 INFO L87 Difference]: Start difference. First operand 112 states and 282 transitions. Second operand 11 states. [2020-12-23 13:00:41,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:41,175 INFO L93 Difference]: Finished difference Result 142 states and 339 transitions. [2020-12-23 13:00:41,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:00:41,176 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:41,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:41,178 INFO L225 Difference]: With dead ends: 142 [2020-12-23 13:00:41,178 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 13:00:41,179 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 [2020-12-23 13:00:41,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 13:00:41,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-12-23 13:00:41,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 13:00:41,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 277 transitions. [2020-12-23 13:00:41,183 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 277 transitions. Word has length 11 [2020-12-23 13:00:41,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:41,184 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 277 transitions. [2020-12-23 13:00:41,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:41,184 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 277 transitions. [2020-12-23 13:00:41,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:41,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:41,185 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:41,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:41,398 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:41,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:41,399 INFO L82 PathProgramCache]: Analyzing trace with hash -2021097717, now seen corresponding path program 11 times [2020-12-23 13:00:41,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:41,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880331642] [2020-12-23 13:00:41,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:41,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:41,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880331642] [2020-12-23 13:00:41,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82457206] [2020-12-23 13:00:41,458 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:41,537 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:41,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:41,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:41,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:41,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:41,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:41,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:41,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940515346] [2020-12-23 13:00:41,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:41,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:41,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:41,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:41,640 INFO L87 Difference]: Start difference. First operand 110 states and 277 transitions. Second operand 11 states. [2020-12-23 13:00:41,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:41,772 INFO L93 Difference]: Finished difference Result 142 states and 340 transitions. [2020-12-23 13:00:41,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:00:41,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:41,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:41,776 INFO L225 Difference]: With dead ends: 142 [2020-12-23 13:00:41,776 INFO L226 Difference]: Without dead ends: 140 [2020-12-23 13:00:41,776 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 [2020-12-23 13:00:41,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-23 13:00:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 112. [2020-12-23 13:00:41,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 13:00:41,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 284 transitions. [2020-12-23 13:00:41,790 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 284 transitions. Word has length 11 [2020-12-23 13:00:41,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:41,790 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 284 transitions. [2020-12-23 13:00:41,791 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:41,791 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 284 transitions. [2020-12-23 13:00:41,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:41,792 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:41,792 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:42,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 13:00:42,007 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:42,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:42,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2021078280, now seen corresponding path program 12 times [2020-12-23 13:00:42,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:42,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048841924] [2020-12-23 13:00:42,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:42,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:42,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:42,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048841924] [2020-12-23 13:00:42,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411157950] [2020-12-23 13:00:42,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:42,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:42,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:42,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:42,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:42,199 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:42,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:42,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:42,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:42,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534901309] [2020-12-23 13:00:42,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:42,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:42,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:42,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:42,210 INFO L87 Difference]: Start difference. First operand 112 states and 284 transitions. Second operand 11 states. [2020-12-23 13:00:42,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:42,384 INFO L93 Difference]: Finished difference Result 157 states and 377 transitions. [2020-12-23 13:00:42,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:00:42,384 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:42,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:42,385 INFO L225 Difference]: With dead ends: 157 [2020-12-23 13:00:42,385 INFO L226 Difference]: Without dead ends: 149 [2020-12-23 13:00:42,386 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 [2020-12-23 13:00:42,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-23 13:00:42,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 113. [2020-12-23 13:00:42,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 13:00:42,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 285 transitions. [2020-12-23 13:00:42,391 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 285 transitions. Word has length 11 [2020-12-23 13:00:42,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:42,391 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 285 transitions. [2020-12-23 13:00:42,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:42,391 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 285 transitions. [2020-12-23 13:00:42,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:42,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:42,392 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:42,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 13:00:42,606 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:42,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:42,607 INFO L82 PathProgramCache]: Analyzing trace with hash -2021075397, now seen corresponding path program 13 times [2020-12-23 13:00:42,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:42,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072928188] [2020-12-23 13:00:42,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:42,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:42,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072928188] [2020-12-23 13:00:42,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856940400] [2020-12-23 13:00:42,668 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:42,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:42,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:42,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:42,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:42,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:42,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380267929] [2020-12-23 13:00:42,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:42,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:42,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:42,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:42,802 INFO L87 Difference]: Start difference. First operand 113 states and 285 transitions. Second operand 11 states. [2020-12-23 13:00:43,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:43,073 INFO L93 Difference]: Finished difference Result 161 states and 389 transitions. [2020-12-23 13:00:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:00:43,074 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:43,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:43,075 INFO L225 Difference]: With dead ends: 161 [2020-12-23 13:00:43,075 INFO L226 Difference]: Without dead ends: 153 [2020-12-23 13:00:43,075 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 [2020-12-23 13:00:43,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-23 13:00:43,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 112. [2020-12-23 13:00:43,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-12-23 13:00:43,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 283 transitions. [2020-12-23 13:00:43,080 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 283 transitions. Word has length 11 [2020-12-23 13:00:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:43,081 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 283 transitions. [2020-12-23 13:00:43,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:43,081 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 283 transitions. [2020-12-23 13:00:43,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:43,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:43,082 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:43,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 13:00:43,296 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:43,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:43,297 INFO L82 PathProgramCache]: Analyzing trace with hash 872406580, now seen corresponding path program 10 times [2020-12-23 13:00:43,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:43,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919148079] [2020-12-23 13:00:43,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:43,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:43,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:43,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919148079] [2020-12-23 13:00:43,388 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [432664029] [2020-12-23 13:00:43,388 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:43,452 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:43,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:43,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:43,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:43,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:43,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:43,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:43,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475430384] [2020-12-23 13:00:43,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:43,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:43,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:43,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:43,597 INFO L87 Difference]: Start difference. First operand 112 states and 283 transitions. Second operand 14 states. [2020-12-23 13:00:43,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:43,644 INFO L93 Difference]: Finished difference Result 139 states and 337 transitions. [2020-12-23 13:00:43,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:00:43,644 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-23 13:00:43,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:43,646 INFO L225 Difference]: With dead ends: 139 [2020-12-23 13:00:43,646 INFO L226 Difference]: Without dead ends: 136 [2020-12-23 13:00:43,646 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 [2020-12-23 13:00:43,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-23 13:00:43,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-12-23 13:00:43,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 13:00:43,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-12-23 13:00:43,651 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 11 [2020-12-23 13:00:43,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:43,651 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-12-23 13:00:43,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:43,651 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-12-23 13:00:43,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:43,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:43,652 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:43,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 13:00:43,866 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:43,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:43,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1041065828, now seen corresponding path program 11 times [2020-12-23 13:00:43,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:43,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483530004] [2020-12-23 13:00:43,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:43,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:43,947 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:43,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483530004] [2020-12-23 13:00:43,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434446832] [2020-12-23 13:00:43,947 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:44,011 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:00:44,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:44,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:44,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:44,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:44,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:44,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:44,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194602307] [2020-12-23 13:00:44,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:44,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:44,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:44,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:44,118 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 14 states. [2020-12-23 13:00:44,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:44,180 INFO L93 Difference]: Finished difference Result 150 states and 358 transitions. [2020-12-23 13:00:44,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:44,180 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-23 13:00:44,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:44,181 INFO L225 Difference]: With dead ends: 150 [2020-12-23 13:00:44,181 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 13:00:44,182 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 [2020-12-23 13:00:44,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 13:00:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 117. [2020-12-23 13:00:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-12-23 13:00:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-12-23 13:00:44,186 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 11 [2020-12-23 13:00:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:44,186 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-12-23 13:00:44,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-12-23 13:00:44,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:44,187 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:44,187 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:44,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 13:00:44,402 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:44,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:44,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1019616308, now seen corresponding path program 12 times [2020-12-23 13:00:44,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:44,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941601988] [2020-12-23 13:00:44,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:44,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:44,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941601988] [2020-12-23 13:00:44,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796923071] [2020-12-23 13:00:44,478 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:44,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:00:44,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:44,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:44,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:44,658 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:44,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:44,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:44,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501310963] [2020-12-23 13:00:44,659 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:44,659 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:44,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:44,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:44,660 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 14 states. [2020-12-23 13:00:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:44,754 INFO L93 Difference]: Finished difference Result 148 states and 353 transitions. [2020-12-23 13:00:44,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:00:44,755 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-23 13:00:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:44,757 INFO L225 Difference]: With dead ends: 148 [2020-12-23 13:00:44,757 INFO L226 Difference]: Without dead ends: 145 [2020-12-23 13:00:44,757 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 [2020-12-23 13:00:44,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-23 13:00:44,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 118. [2020-12-23 13:00:44,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-12-23 13:00:44,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 296 transitions. [2020-12-23 13:00:44,762 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 296 transitions. Word has length 11 [2020-12-23 13:00:44,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:44,763 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 296 transitions. [2020-12-23 13:00:44,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:44,763 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 296 transitions. [2020-12-23 13:00:44,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:44,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:44,764 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:44,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:44,978 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:44,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:44,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1018924388, now seen corresponding path program 13 times [2020-12-23 13:00:44,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:44,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153344585] [2020-12-23 13:00:44,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:44,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:45,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153344585] [2020-12-23 13:00:45,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131878970] [2020-12-23 13:00:45,049 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:45,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:45,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:45,239 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:45,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:45,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:45,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915602490] [2020-12-23 13:00:45,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:45,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:45,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:45,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:45,241 INFO L87 Difference]: Start difference. First operand 118 states and 296 transitions. Second operand 14 states. [2020-12-23 13:00:45,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:45,369 INFO L93 Difference]: Finished difference Result 147 states and 353 transitions. [2020-12-23 13:00:45,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:00:45,369 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-23 13:00:45,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:45,371 INFO L225 Difference]: With dead ends: 147 [2020-12-23 13:00:45,371 INFO L226 Difference]: Without dead ends: 144 [2020-12-23 13:00:45,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:00:45,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-23 13:00:45,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 120. [2020-12-23 13:00:45,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-12-23 13:00:45,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 303 transitions. [2020-12-23 13:00:45,378 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 303 transitions. Word has length 11 [2020-12-23 13:00:45,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:45,378 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 303 transitions. [2020-12-23 13:00:45,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:45,378 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 303 transitions. [2020-12-23 13:00:45,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:45,379 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:45,379 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:45,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:45,592 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:45,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:45,593 INFO L82 PathProgramCache]: Analyzing trace with hash -1018902068, now seen corresponding path program 14 times [2020-12-23 13:00:45,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:45,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946669231] [2020-12-23 13:00:45,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:45,683 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:45,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946669231] [2020-12-23 13:00:45,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716874817] [2020-12-23 13:00:45,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:45,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:45,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:45,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:45,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:45,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:45,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:45,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:45,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778557984] [2020-12-23 13:00:45,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:45,861 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:45,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:45,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:45,861 INFO L87 Difference]: Start difference. First operand 120 states and 303 transitions. Second operand 14 states. [2020-12-23 13:00:46,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:46,072 INFO L93 Difference]: Finished difference Result 172 states and 415 transitions. [2020-12-23 13:00:46,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:00:46,072 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-23 13:00:46,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:46,073 INFO L225 Difference]: With dead ends: 172 [2020-12-23 13:00:46,074 INFO L226 Difference]: Without dead ends: 160 [2020-12-23 13:00:46,074 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 [2020-12-23 13:00:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-12-23 13:00:46,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 125. [2020-12-23 13:00:46,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 13:00:46,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 320 transitions. [2020-12-23 13:00:46,079 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 320 transitions. Word has length 11 [2020-12-23 13:00:46,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:46,079 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 320 transitions. [2020-12-23 13:00:46,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:46,079 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 320 transitions. [2020-12-23 13:00:46,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:46,080 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:46,080 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:46,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:46,294 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:46,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:46,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1852535327, now seen corresponding path program 14 times [2020-12-23 13:00:46,295 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:46,295 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930245108] [2020-12-23 13:00:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:46,377 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:46,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930245108] [2020-12-23 13:00:46,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612549300] [2020-12-23 13:00:46,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:46,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:46,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:46,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:46,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:46,567 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:46,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:46,567 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:46,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887344583] [2020-12-23 13:00:46,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:46,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:46,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:46,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:46,569 INFO L87 Difference]: Start difference. First operand 125 states and 320 transitions. Second operand 14 states. [2020-12-23 13:00:46,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:46,699 INFO L93 Difference]: Finished difference Result 153 states and 371 transitions. [2020-12-23 13:00:46,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:00:46,703 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:46,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:46,704 INFO L225 Difference]: With dead ends: 153 [2020-12-23 13:00:46,704 INFO L226 Difference]: Without dead ends: 151 [2020-12-23 13:00:46,705 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 [2020-12-23 13:00:46,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-23 13:00:46,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 131. [2020-12-23 13:00:46,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 13:00:46,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 332 transitions. [2020-12-23 13:00:46,714 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 332 transitions. Word has length 12 [2020-12-23 13:00:46,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:46,715 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 332 transitions. [2020-12-23 13:00:46,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:46,715 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 332 transitions. [2020-12-23 13:00:46,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:46,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:46,715 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:46,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 13:00:46,928 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:46,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:46,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1852903607, now seen corresponding path program 15 times [2020-12-23 13:00:46,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:46,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883525048] [2020-12-23 13:00:46,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:47,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:47,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883525048] [2020-12-23 13:00:47,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479630077] [2020-12-23 13:00:47,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:47,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:47,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:47,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:47,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:47,199 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:00:47,205 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:00:47,209 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:47,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:47,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:47,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725682339] [2020-12-23 13:00:47,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:47,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:47,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:47,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:47,222 INFO L87 Difference]: Start difference. First operand 131 states and 332 transitions. Second operand 13 states. [2020-12-23 13:00:47,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:47,478 INFO L93 Difference]: Finished difference Result 187 states and 451 transitions. [2020-12-23 13:00:47,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:00:47,478 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:47,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:47,480 INFO L225 Difference]: With dead ends: 187 [2020-12-23 13:00:47,480 INFO L226 Difference]: Without dead ends: 179 [2020-12-23 13:00:47,480 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 [2020-12-23 13:00:47,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-12-23 13:00:47,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 126. [2020-12-23 13:00:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-23 13:00:47,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 321 transitions. [2020-12-23 13:00:47,485 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 321 transitions. Word has length 12 [2020-12-23 13:00:47,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:47,486 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 321 transitions. [2020-12-23 13:00:47,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:47,486 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 321 transitions. [2020-12-23 13:00:47,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:47,486 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:47,487 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:47,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:47,700 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:47,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:47,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1504016080, now seen corresponding path program 16 times [2020-12-23 13:00:47,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:47,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43262556] [2020-12-23 13:00:47,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:47,787 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:47,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43262556] [2020-12-23 13:00:47,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [674474155] [2020-12-23 13:00:47,787 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:47,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:47,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:47,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:47,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:47,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:47,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:47,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:47,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763572049] [2020-12-23 13:00:47,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:47,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:47,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:47,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:47,994 INFO L87 Difference]: Start difference. First operand 126 states and 321 transitions. Second operand 14 states. [2020-12-23 13:00:48,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:48,188 INFO L93 Difference]: Finished difference Result 167 states and 397 transitions. [2020-12-23 13:00:48,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:00:48,188 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:48,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:48,190 INFO L225 Difference]: With dead ends: 167 [2020-12-23 13:00:48,190 INFO L226 Difference]: Without dead ends: 165 [2020-12-23 13:00:48,190 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 [2020-12-23 13:00:48,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-12-23 13:00:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 130. [2020-12-23 13:00:48,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 13:00:48,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 327 transitions. [2020-12-23 13:00:48,196 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 327 transitions. Word has length 12 [2020-12-23 13:00:48,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:48,196 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 327 transitions. [2020-12-23 13:00:48,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:48,196 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 327 transitions. [2020-12-23 13:00:48,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:48,197 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:48,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:48,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 13:00:48,411 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:48,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:48,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1515432760, now seen corresponding path program 17 times [2020-12-23 13:00:48,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:48,412 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069886479] [2020-12-23 13:00:48,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:48,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:48,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069886479] [2020-12-23 13:00:48,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146915307] [2020-12-23 13:00:48,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:48,559 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:48,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:48,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:48,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:48,725 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:48,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:48,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:48,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564929980] [2020-12-23 13:00:48,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:48,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:48,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:48,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:48,728 INFO L87 Difference]: Start difference. First operand 130 states and 327 transitions. Second operand 14 states. [2020-12-23 13:00:48,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:48,985 INFO L93 Difference]: Finished difference Result 165 states and 397 transitions. [2020-12-23 13:00:48,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:00:48,985 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:48,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:48,987 INFO L225 Difference]: With dead ends: 165 [2020-12-23 13:00:48,987 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 13:00:48,988 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=260, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:00:48,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 13:00:48,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 132. [2020-12-23 13:00:48,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 13:00:48,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 334 transitions. [2020-12-23 13:00:48,993 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 334 transitions. Word has length 12 [2020-12-23 13:00:48,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:48,993 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 334 transitions. [2020-12-23 13:00:48,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:48,993 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 334 transitions. [2020-12-23 13:00:48,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:48,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:48,994 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:49,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:49,208 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:49,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:49,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1515455080, now seen corresponding path program 18 times [2020-12-23 13:00:49,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:49,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686439706] [2020-12-23 13:00:49,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:49,289 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:49,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686439706] [2020-12-23 13:00:49,290 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008190806] [2020-12-23 13:00:49,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:49,356 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:49,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:49,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:49,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:49,450 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:00:49,454 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:00:49,456 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:49,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:49,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:49,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350577431] [2020-12-23 13:00:49,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:49,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:49,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:49,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:49,470 INFO L87 Difference]: Start difference. First operand 132 states and 334 transitions. Second operand 13 states. [2020-12-23 13:00:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:49,796 INFO L93 Difference]: Finished difference Result 190 states and 459 transitions. [2020-12-23 13:00:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:00:49,797 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:49,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:49,798 INFO L225 Difference]: With dead ends: 190 [2020-12-23 13:00:49,798 INFO L226 Difference]: Without dead ends: 182 [2020-12-23 13:00:49,799 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 [2020-12-23 13:00:49,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-12-23 13:00:49,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 126. [2020-12-23 13:00:49,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-23 13:00:49,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 321 transitions. [2020-12-23 13:00:49,804 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 321 transitions. Word has length 12 [2020-12-23 13:00:49,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:49,804 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 321 transitions. [2020-12-23 13:00:49,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:49,804 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 321 transitions. [2020-12-23 13:00:49,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:49,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:49,805 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:50,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 13:00:50,019 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:50,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:50,020 INFO L82 PathProgramCache]: Analyzing trace with hash -710148868, now seen corresponding path program 19 times [2020-12-23 13:00:50,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:50,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959394637] [2020-12-23 13:00:50,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:50,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:50,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:50,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959394637] [2020-12-23 13:00:50,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099817048] [2020-12-23 13:00:50,101 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:50,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:50,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:50,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:50,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:50,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:50,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:50,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203608747] [2020-12-23 13:00:50,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:50,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:50,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:50,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:50,314 INFO L87 Difference]: Start difference. First operand 126 states and 321 transitions. Second operand 14 states. [2020-12-23 13:00:50,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:50,509 INFO L93 Difference]: Finished difference Result 171 states and 407 transitions. [2020-12-23 13:00:50,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:00:50,509 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:50,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:50,511 INFO L225 Difference]: With dead ends: 171 [2020-12-23 13:00:50,511 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 13:00:50,511 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 [2020-12-23 13:00:50,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 13:00:50,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 131. [2020-12-23 13:00:50,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-12-23 13:00:50,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 328 transitions. [2020-12-23 13:00:50,534 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 328 transitions. Word has length 12 [2020-12-23 13:00:50,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:50,534 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 328 transitions. [2020-12-23 13:00:50,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:50,534 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 328 transitions. [2020-12-23 13:00:50,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:50,535 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:50,535 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:50,749 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:50,750 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:50,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:50,751 INFO L82 PathProgramCache]: Analyzing trace with hash -356231788, now seen corresponding path program 20 times [2020-12-23 13:00:50,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:50,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257384880] [2020-12-23 13:00:50,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:50,830 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:50,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257384880] [2020-12-23 13:00:50,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219392889] [2020-12-23 13:00:50,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:50,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:50,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:50,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:50,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:51,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:51,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:51,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681304613] [2020-12-23 13:00:51,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:51,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:51,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:51,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:51,018 INFO L87 Difference]: Start difference. First operand 131 states and 328 transitions. Second operand 14 states. [2020-12-23 13:00:51,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:51,260 INFO L93 Difference]: Finished difference Result 183 states and 431 transitions. [2020-12-23 13:00:51,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:00:51,260 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:51,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:51,262 INFO L225 Difference]: With dead ends: 183 [2020-12-23 13:00:51,262 INFO L226 Difference]: Without dead ends: 181 [2020-12-23 13:00:51,262 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 [2020-12-23 13:00:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-23 13:00:51,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 133. [2020-12-23 13:00:51,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 13:00:51,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 335 transitions. [2020-12-23 13:00:51,268 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 335 transitions. Word has length 12 [2020-12-23 13:00:51,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:51,268 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 335 transitions. [2020-12-23 13:00:51,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:51,269 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 335 transitions. [2020-12-23 13:00:51,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:51,269 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:51,269 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:51,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 13:00:51,484 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:51,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:51,485 INFO L82 PathProgramCache]: Analyzing trace with hash -355626358, now seen corresponding path program 21 times [2020-12-23 13:00:51,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:51,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8179787] [2020-12-23 13:00:51,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:51,555 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:51,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8179787] [2020-12-23 13:00:51,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972466767] [2020-12-23 13:00:51,555 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:51,620 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:51,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:51,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:51,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:51,727 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:51,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:51,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:51,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203460977] [2020-12-23 13:00:51,728 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:51,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:51,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:51,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:51,729 INFO L87 Difference]: Start difference. First operand 133 states and 335 transitions. Second operand 14 states. [2020-12-23 13:00:52,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:52,005 INFO L93 Difference]: Finished difference Result 176 states and 423 transitions. [2020-12-23 13:00:52,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:00:52,006 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:52,007 INFO L225 Difference]: With dead ends: 176 [2020-12-23 13:00:52,007 INFO L226 Difference]: Without dead ends: 174 [2020-12-23 13:00:52,008 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:00:52,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-12-23 13:00:52,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 136. [2020-12-23 13:00:52,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 13:00:52,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 347 transitions. [2020-12-23 13:00:52,013 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 347 transitions. Word has length 12 [2020-12-23 13:00:52,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:52,013 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 347 transitions. [2020-12-23 13:00:52,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:52,013 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 347 transitions. [2020-12-23 13:00:52,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:52,014 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:52,014 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:52,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 13:00:52,229 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:52,230 INFO L82 PathProgramCache]: Analyzing trace with hash -355606921, now seen corresponding path program 22 times [2020-12-23 13:00:52,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:52,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200714438] [2020-12-23 13:00:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:52,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:52,318 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:52,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200714438] [2020-12-23 13:00:52,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482663950] [2020-12-23 13:00:52,319 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:52,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:52,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:52,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:52,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:52,479 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:52,487 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:52,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:52,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:52,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920868348] [2020-12-23 13:00:52,488 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:52,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:52,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:52,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:52,489 INFO L87 Difference]: Start difference. First operand 136 states and 347 transitions. Second operand 13 states. [2020-12-23 13:00:52,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:52,819 INFO L93 Difference]: Finished difference Result 194 states and 472 transitions. [2020-12-23 13:00:52,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:00:52,819 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:52,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:52,821 INFO L225 Difference]: With dead ends: 194 [2020-12-23 13:00:52,821 INFO L226 Difference]: Without dead ends: 186 [2020-12-23 13:00:52,822 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 [2020-12-23 13:00:52,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-12-23 13:00:52,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 136. [2020-12-23 13:00:52,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 13:00:52,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 347 transitions. [2020-12-23 13:00:52,828 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 347 transitions. Word has length 12 [2020-12-23 13:00:52,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:52,828 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 347 transitions. [2020-12-23 13:00:52,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:52,829 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 347 transitions. [2020-12-23 13:00:52,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:52,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:52,829 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:53,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 13:00:53,043 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:53,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:53,044 INFO L82 PathProgramCache]: Analyzing trace with hash -355604038, now seen corresponding path program 23 times [2020-12-23 13:00:53,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:53,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524199767] [2020-12-23 13:00:53,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:53,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:53,114 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:53,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524199767] [2020-12-23 13:00:53,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338489314] [2020-12-23 13:00:53,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:53,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:53,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:53,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:53,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:53,266 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:53,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:53,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:53,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972546903] [2020-12-23 13:00:53,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:53,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:53,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:53,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:53,268 INFO L87 Difference]: Start difference. First operand 136 states and 347 transitions. Second operand 13 states. [2020-12-23 13:00:53,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:53,663 INFO L93 Difference]: Finished difference Result 195 states and 472 transitions. [2020-12-23 13:00:53,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:00:53,663 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:53,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:53,665 INFO L225 Difference]: With dead ends: 195 [2020-12-23 13:00:53,665 INFO L226 Difference]: Without dead ends: 187 [2020-12-23 13:00:53,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:00:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-12-23 13:00:53,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 132. [2020-12-23 13:00:53,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 13:00:53,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 336 transitions. [2020-12-23 13:00:53,671 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 336 transitions. Word has length 12 [2020-12-23 13:00:53,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:53,671 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 336 transitions. [2020-12-23 13:00:53,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:53,671 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 336 transitions. [2020-12-23 13:00:53,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:53,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:53,672 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:53,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-23 13:00:53,886 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:53,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:53,887 INFO L82 PathProgramCache]: Analyzing trace with hash -629785520, now seen corresponding path program 24 times [2020-12-23 13:00:53,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:53,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887479920] [2020-12-23 13:00:53,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:53,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887479920] [2020-12-23 13:00:53,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119775355] [2020-12-23 13:00:53,961 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:54,029 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:00:54,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:54,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:54,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:54,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:54,156 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:54,157 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:54,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195779863] [2020-12-23 13:00:54,157 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:54,157 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:54,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:54,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:54,158 INFO L87 Difference]: Start difference. First operand 132 states and 336 transitions. Second operand 14 states. [2020-12-23 13:00:54,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:54,293 INFO L93 Difference]: Finished difference Result 168 states and 409 transitions. [2020-12-23 13:00:54,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:00:54,294 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:54,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:54,296 INFO L225 Difference]: With dead ends: 168 [2020-12-23 13:00:54,296 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 13:00:54,296 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 [2020-12-23 13:00:54,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 13:00:54,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 137. [2020-12-23 13:00:54,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 13:00:54,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 349 transitions. [2020-12-23 13:00:54,301 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 349 transitions. Word has length 12 [2020-12-23 13:00:54,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:54,301 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 349 transitions. [2020-12-23 13:00:54,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:54,301 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 349 transitions. [2020-12-23 13:00:54,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:54,302 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:54,302 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:54,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:54,516 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:54,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:54,516 INFO L82 PathProgramCache]: Analyzing trace with hash -629782637, now seen corresponding path program 25 times [2020-12-23 13:00:54,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:54,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889092905] [2020-12-23 13:00:54,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:54,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:54,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:54,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889092905] [2020-12-23 13:00:54,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513687917] [2020-12-23 13:00:54,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:54,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:54,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:54,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:54,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:54,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:54,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967370620] [2020-12-23 13:00:54,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:54,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:54,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:54,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:54,765 INFO L87 Difference]: Start difference. First operand 137 states and 349 transitions. Second operand 14 states. [2020-12-23 13:00:54,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:54,909 INFO L93 Difference]: Finished difference Result 169 states and 411 transitions. [2020-12-23 13:00:54,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:00:54,914 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:54,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:54,916 INFO L225 Difference]: With dead ends: 169 [2020-12-23 13:00:54,916 INFO L226 Difference]: Without dead ends: 167 [2020-12-23 13:00:54,916 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 [2020-12-23 13:00:54,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-12-23 13:00:54,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 136. [2020-12-23 13:00:54,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 13:00:54,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 346 transitions. [2020-12-23 13:00:54,921 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 346 transitions. Word has length 12 [2020-12-23 13:00:54,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:54,921 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 346 transitions. [2020-12-23 13:00:54,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:54,921 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 346 transitions. [2020-12-23 13:00:54,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:54,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:54,922 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:55,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 13:00:55,138 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:55,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:55,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1751709368, now seen corresponding path program 26 times [2020-12-23 13:00:55,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:55,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324035047] [2020-12-23 13:00:55,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:55,216 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:55,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324035047] [2020-12-23 13:00:55,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050662901] [2020-12-23 13:00:55,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:55,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:55,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:55,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:55,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:55,381 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:55,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:55,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:55,383 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982125414] [2020-12-23 13:00:55,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:55,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:55,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:55,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:55,384 INFO L87 Difference]: Start difference. First operand 136 states and 346 transitions. Second operand 14 states. [2020-12-23 13:00:55,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:55,522 INFO L93 Difference]: Finished difference Result 177 states and 427 transitions. [2020-12-23 13:00:55,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:00:55,523 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:55,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:55,524 INFO L225 Difference]: With dead ends: 177 [2020-12-23 13:00:55,525 INFO L226 Difference]: Without dead ends: 175 [2020-12-23 13:00:55,525 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 [2020-12-23 13:00:55,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-23 13:00:55,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 137. [2020-12-23 13:00:55,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 13:00:55,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 349 transitions. [2020-12-23 13:00:55,530 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 349 transitions. Word has length 12 [2020-12-23 13:00:55,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:55,531 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 349 transitions. [2020-12-23 13:00:55,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:55,531 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 349 transitions. [2020-12-23 13:00:55,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:55,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:55,532 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:55,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 13:00:55,743 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:55,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:55,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1751712251, now seen corresponding path program 27 times [2020-12-23 13:00:55,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:55,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264117942] [2020-12-23 13:00:55,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:55,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:55,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264117942] [2020-12-23 13:00:55,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741278167] [2020-12-23 13:00:55,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:55,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:55,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:55,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:55,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:56,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:56,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:56,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792636929] [2020-12-23 13:00:56,013 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:56,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:56,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:56,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:56,014 INFO L87 Difference]: Start difference. First operand 137 states and 349 transitions. Second operand 14 states. [2020-12-23 13:00:56,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:56,192 INFO L93 Difference]: Finished difference Result 174 states and 420 transitions. [2020-12-23 13:00:56,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:00:56,193 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:56,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:56,194 INFO L225 Difference]: With dead ends: 174 [2020-12-23 13:00:56,194 INFO L226 Difference]: Without dead ends: 172 [2020-12-23 13:00:56,195 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 [2020-12-23 13:00:56,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-23 13:00:56,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 134. [2020-12-23 13:00:56,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 13:00:56,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 341 transitions. [2020-12-23 13:00:56,199 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 341 transitions. Word has length 12 [2020-12-23 13:00:56,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:56,200 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 341 transitions. [2020-12-23 13:00:56,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:56,200 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 341 transitions. [2020-12-23 13:00:56,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:56,200 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:56,200 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:56,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:56,410 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:56,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:56,411 INFO L82 PathProgramCache]: Analyzing trace with hash 1770477698, now seen corresponding path program 28 times [2020-12-23 13:00:56,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:56,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697055966] [2020-12-23 13:00:56,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:56,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:56,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697055966] [2020-12-23 13:00:56,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710925320] [2020-12-23 13:00:56,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:56,564 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:56,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:56,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:56,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:56,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:56,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:56,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:56,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262199602] [2020-12-23 13:00:56,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:56,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:56,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:56,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:56,705 INFO L87 Difference]: Start difference. First operand 134 states and 341 transitions. Second operand 14 states. [2020-12-23 13:00:56,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:56,883 INFO L93 Difference]: Finished difference Result 183 states and 438 transitions. [2020-12-23 13:00:56,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:00:56,883 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:56,885 INFO L225 Difference]: With dead ends: 183 [2020-12-23 13:00:56,885 INFO L226 Difference]: Without dead ends: 181 [2020-12-23 13:00:56,886 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 [2020-12-23 13:00:56,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-23 13:00:56,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 134. [2020-12-23 13:00:56,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 13:00:56,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 344 transitions. [2020-12-23 13:00:56,890 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 344 transitions. Word has length 12 [2020-12-23 13:00:56,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:56,891 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 344 transitions. [2020-12-23 13:00:56,891 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:56,891 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 344 transitions. [2020-12-23 13:00:56,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:56,891 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:56,892 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:57,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 13:00:57,105 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:57,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:57,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1770480581, now seen corresponding path program 29 times [2020-12-23 13:00:57,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:57,106 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655059181] [2020-12-23 13:00:57,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:57,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:57,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:57,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655059181] [2020-12-23 13:00:57,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689852815] [2020-12-23 13:00:57,178 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:57,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:57,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:57,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:57,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:57,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:57,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:57,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994532956] [2020-12-23 13:00:57,356 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:57,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:57,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:57,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:57,357 INFO L87 Difference]: Start difference. First operand 134 states and 344 transitions. Second operand 14 states. [2020-12-23 13:00:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:57,554 INFO L93 Difference]: Finished difference Result 180 states and 432 transitions. [2020-12-23 13:00:57,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:00:57,555 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:57,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:57,556 INFO L225 Difference]: With dead ends: 180 [2020-12-23 13:00:57,556 INFO L226 Difference]: Without dead ends: 178 [2020-12-23 13:00:57,557 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 [2020-12-23 13:00:57,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-23 13:00:57,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 134. [2020-12-23 13:00:57,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 13:00:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 343 transitions. [2020-12-23 13:00:57,561 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 343 transitions. Word has length 12 [2020-12-23 13:00:57,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:57,562 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 343 transitions. [2020-12-23 13:00:57,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:57,562 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 343 transitions. [2020-12-23 13:00:57,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:57,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:57,563 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:57,776 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:57,777 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:57,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:57,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1771083128, now seen corresponding path program 30 times [2020-12-23 13:00:57,778 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:57,778 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167187393] [2020-12-23 13:00:57,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:57,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:57,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167187393] [2020-12-23 13:00:57,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47652268] [2020-12-23 13:00:57,856 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:57,929 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:00:57,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:57,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:57,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:58,039 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:58,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:58,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:58,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013659351] [2020-12-23 13:00:58,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:58,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:58,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:58,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:58,040 INFO L87 Difference]: Start difference. First operand 134 states and 343 transitions. Second operand 14 states. [2020-12-23 13:00:58,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:58,307 INFO L93 Difference]: Finished difference Result 180 states and 435 transitions. [2020-12-23 13:00:58,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:00:58,308 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:58,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:58,309 INFO L225 Difference]: With dead ends: 180 [2020-12-23 13:00:58,310 INFO L226 Difference]: Without dead ends: 178 [2020-12-23 13:00:58,310 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 [2020-12-23 13:00:58,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-23 13:00:58,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 137. [2020-12-23 13:00:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 13:00:58,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 355 transitions. [2020-12-23 13:00:58,314 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 355 transitions. Word has length 12 [2020-12-23 13:00:58,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:58,314 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 355 transitions. [2020-12-23 13:00:58,315 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:58,315 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 355 transitions. [2020-12-23 13:00:58,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:58,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:58,315 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:58,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 13:00:58,530 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:58,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:58,531 INFO L82 PathProgramCache]: Analyzing trace with hash 1771105448, now seen corresponding path program 31 times [2020-12-23 13:00:58,531 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:58,531 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301745729] [2020-12-23 13:00:58,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:58,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:58,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301745729] [2020-12-23 13:00:58,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621557494] [2020-12-23 13:00:58,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:58,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:58,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:58,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:58,749 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:00:58,751 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:00:58,753 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:58,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:58,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:58,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:58,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406943950] [2020-12-23 13:00:58,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:58,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:58,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:58,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:58,765 INFO L87 Difference]: Start difference. First operand 137 states and 355 transitions. Second operand 13 states. [2020-12-23 13:00:59,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:59,151 INFO L93 Difference]: Finished difference Result 198 states and 480 transitions. [2020-12-23 13:00:59,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:00:59,152 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:59,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:59,153 INFO L225 Difference]: With dead ends: 198 [2020-12-23 13:00:59,153 INFO L226 Difference]: Without dead ends: 190 [2020-12-23 13:00:59,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:00:59,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-23 13:00:59,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 134. [2020-12-23 13:00:59,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 13:00:59,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 343 transitions. [2020-12-23 13:00:59,159 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 343 transitions. Word has length 12 [2020-12-23 13:00:59,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:59,159 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 343 transitions. [2020-12-23 13:00:59,159 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:59,159 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 343 transitions. [2020-12-23 13:00:59,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:59,160 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:59,160 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:59,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 13:00:59,375 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:59,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:59,376 INFO L82 PathProgramCache]: Analyzing trace with hash 1771172501, now seen corresponding path program 32 times [2020-12-23 13:00:59,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:59,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854918887] [2020-12-23 13:00:59,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:59,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:59,445 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:59,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854918887] [2020-12-23 13:00:59,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696969173] [2020-12-23 13:00:59,445 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:00:59,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:59,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:59,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:59,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:59,605 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:59,606 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:59,606 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:59,606 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792658999] [2020-12-23 13:00:59,607 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:59,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:59,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:59,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:59,608 INFO L87 Difference]: Start difference. First operand 134 states and 343 transitions. Second operand 14 states. [2020-12-23 13:00:59,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:59,871 INFO L93 Difference]: Finished difference Result 180 states and 433 transitions. [2020-12-23 13:00:59,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:00:59,871 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:59,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:59,873 INFO L225 Difference]: With dead ends: 180 [2020-12-23 13:00:59,873 INFO L226 Difference]: Without dead ends: 178 [2020-12-23 13:00:59,874 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 [2020-12-23 13:00:59,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-12-23 13:00:59,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 136. [2020-12-23 13:00:59,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-12-23 13:00:59,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 350 transitions. [2020-12-23 13:00:59,878 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 350 transitions. Word has length 12 [2020-12-23 13:00:59,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:59,878 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 350 transitions. [2020-12-23 13:00:59,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:59,879 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 350 transitions. [2020-12-23 13:00:59,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:59,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:59,879 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:00,093 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 13:01:00,094 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:00,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:00,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1771194821, now seen corresponding path program 33 times [2020-12-23 13:01:00,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:00,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345473813] [2020-12-23 13:01:00,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:00,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:00,161 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:00,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345473813] [2020-12-23 13:01:00,162 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575637748] [2020-12-23 13:01:00,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:00,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:01:00,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:00,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:01:00,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:00,317 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:00,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:00,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:01:00,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067727943] [2020-12-23 13:01:00,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:01:00,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:00,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:01:00,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:01:00,319 INFO L87 Difference]: Start difference. First operand 136 states and 350 transitions. Second operand 13 states. [2020-12-23 13:01:00,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:00,778 INFO L93 Difference]: Finished difference Result 198 states and 480 transitions. [2020-12-23 13:01:00,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:00,778 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:01:00,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:00,780 INFO L225 Difference]: With dead ends: 198 [2020-12-23 13:01:00,780 INFO L226 Difference]: Without dead ends: 190 [2020-12-23 13:01:00,780 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 [2020-12-23 13:01:00,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-12-23 13:01:00,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 134. [2020-12-23 13:01:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-12-23 13:01:00,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 342 transitions. [2020-12-23 13:01:00,785 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 342 transitions. Word has length 12 [2020-12-23 13:01:00,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:00,785 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 342 transitions. [2020-12-23 13:01:00,785 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:01:00,785 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 342 transitions. [2020-12-23 13:01:00,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:00,786 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:00,786 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:01,001 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-23 13:01:01,002 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:01,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:01,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1625739156, now seen corresponding path program 4 times [2020-12-23 13:01:01,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:01,003 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109541732] [2020-12-23 13:01:01,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:01,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:01,119 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:01,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109541732] [2020-12-23 13:01:01,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48522320] [2020-12-23 13:01:01,120 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:01,190 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:01,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:01,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:01,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:01,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:01,371 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:01,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:01,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:01,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705142290] [2020-12-23 13:01:01,372 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:01,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:01,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:01,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:01,373 INFO L87 Difference]: Start difference. First operand 134 states and 342 transitions. Second operand 18 states. [2020-12-23 13:01:01,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:01,597 INFO L93 Difference]: Finished difference Result 210 states and 508 transitions. [2020-12-23 13:01:01,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:01,601 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-12-23 13:01:01,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:01,602 INFO L225 Difference]: With dead ends: 210 [2020-12-23 13:01:01,602 INFO L226 Difference]: Without dead ends: 202 [2020-12-23 13:01:01,602 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 [2020-12-23 13:01:01,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-23 13:01:01,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 145. [2020-12-23 13:01:01,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 13:01:01,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 379 transitions. [2020-12-23 13:01:01,607 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 379 transitions. Word has length 13 [2020-12-23 13:01:01,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:01,607 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 379 transitions. [2020-12-23 13:01:01,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:01,607 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 379 transitions. [2020-12-23 13:01:01,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:01,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:01,608 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:01,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:01,823 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:01,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:01,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1942539904, now seen corresponding path program 34 times [2020-12-23 13:01:01,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:01,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397174530] [2020-12-23 13:01:01,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:01,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:01,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397174530] [2020-12-23 13:01:01,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424932314] [2020-12-23 13:01:01,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:01,985 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:01,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:01,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:01,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:02,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:02,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:02,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:02,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408960167] [2020-12-23 13:01:02,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:02,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:02,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:02,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:02,143 INFO L87 Difference]: Start difference. First operand 145 states and 379 transitions. Second operand 16 states. [2020-12-23 13:01:02,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:02,294 INFO L93 Difference]: Finished difference Result 177 states and 439 transitions. [2020-12-23 13:01:02,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:01:02,295 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:02,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:02,297 INFO L225 Difference]: With dead ends: 177 [2020-12-23 13:01:02,297 INFO L226 Difference]: Without dead ends: 175 [2020-12-23 13:01:02,298 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 [2020-12-23 13:01:02,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-23 13:01:02,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 152. [2020-12-23 13:01:02,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 13:01:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 394 transitions. [2020-12-23 13:01:02,302 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 394 transitions. Word has length 13 [2020-12-23 13:01:02,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:02,303 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 394 transitions. [2020-12-23 13:01:02,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:02,303 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 394 transitions. [2020-12-23 13:01:02,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:02,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:02,304 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:02,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-23 13:01:02,513 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:02,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:02,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1942908184, now seen corresponding path program 35 times [2020-12-23 13:01:02,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:02,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427269961] [2020-12-23 13:01:02,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:02,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:02,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427269961] [2020-12-23 13:01:02,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397323421] [2020-12-23 13:01:02,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:02,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:02,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:02,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:02,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:02,818 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:02,825 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:01:02,828 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:02,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:02,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:02,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:02,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479866565] [2020-12-23 13:01:02,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:02,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:02,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:02,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:02,856 INFO L87 Difference]: Start difference. First operand 152 states and 394 transitions. Second operand 16 states. [2020-12-23 13:01:03,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:03,285 INFO L93 Difference]: Finished difference Result 240 states and 582 transitions. [2020-12-23 13:01:03,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:03,285 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:03,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:03,287 INFO L225 Difference]: With dead ends: 240 [2020-12-23 13:01:03,287 INFO L226 Difference]: Without dead ends: 228 [2020-12-23 13:01:03,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:01:03,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-12-23 13:01:03,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 144. [2020-12-23 13:01:03,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-23 13:01:03,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 383 transitions. [2020-12-23 13:01:03,292 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 383 transitions. Word has length 13 [2020-12-23 13:01:03,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:03,292 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 383 transitions. [2020-12-23 13:01:03,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:03,292 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 383 transitions. [2020-12-23 13:01:03,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:03,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:03,293 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:03,505 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:03,506 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:03,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:03,507 INFO L82 PathProgramCache]: Analyzing trace with hash -620144291, now seen corresponding path program 36 times [2020-12-23 13:01:03,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:03,507 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476589423] [2020-12-23 13:01:03,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:03,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:03,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:03,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476589423] [2020-12-23 13:01:03,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321123635] [2020-12-23 13:01:03,608 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:03,670 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:01:03,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:03,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:03,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:03,864 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:03,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:03,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:03,865 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985663709] [2020-12-23 13:01:03,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:03,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:03,866 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:03,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:03,867 INFO L87 Difference]: Start difference. First operand 144 states and 383 transitions. Second operand 16 states. [2020-12-23 13:01:04,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:04,155 INFO L93 Difference]: Finished difference Result 201 states and 492 transitions. [2020-12-23 13:01:04,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:01:04,156 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:04,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:04,158 INFO L225 Difference]: With dead ends: 201 [2020-12-23 13:01:04,158 INFO L226 Difference]: Without dead ends: 199 [2020-12-23 13:01:04,158 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:01:04,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-12-23 13:01:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 148. [2020-12-23 13:01:04,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-23 13:01:04,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 389 transitions. [2020-12-23 13:01:04,163 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 389 transitions. Word has length 13 [2020-12-23 13:01:04,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:04,163 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 389 transitions. [2020-12-23 13:01:04,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:04,163 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 389 transitions. [2020-12-23 13:01:04,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:04,164 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:04,164 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:04,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 13:01:04,380 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:04,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:04,381 INFO L82 PathProgramCache]: Analyzing trace with hash -266227211, now seen corresponding path program 37 times [2020-12-23 13:01:04,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:04,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898013036] [2020-12-23 13:01:04,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:04,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:04,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:04,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898013036] [2020-12-23 13:01:04,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657561418] [2020-12-23 13:01:04,480 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:04,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:04,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:04,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:04,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:04,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:04,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937908898] [2020-12-23 13:01:04,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:04,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:04,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:04,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:04,726 INFO L87 Difference]: Start difference. First operand 148 states and 389 transitions. Second operand 16 states. [2020-12-23 13:01:05,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:05,098 INFO L93 Difference]: Finished difference Result 214 states and 515 transitions. [2020-12-23 13:01:05,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:05,099 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:05,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:05,101 INFO L225 Difference]: With dead ends: 214 [2020-12-23 13:01:05,101 INFO L226 Difference]: Without dead ends: 212 [2020-12-23 13:01:05,101 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 [2020-12-23 13:01:05,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-23 13:01:05,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 150. [2020-12-23 13:01:05,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 13:01:05,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 396 transitions. [2020-12-23 13:01:05,106 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 396 transitions. Word has length 13 [2020-12-23 13:01:05,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:05,107 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 396 transitions. [2020-12-23 13:01:05,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:05,107 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 396 transitions. [2020-12-23 13:01:05,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:05,107 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:05,107 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:05,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 13:01:05,317 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:05,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:05,318 INFO L82 PathProgramCache]: Analyzing trace with hash -265621781, now seen corresponding path program 38 times [2020-12-23 13:01:05,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:05,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303263238] [2020-12-23 13:01:05,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:05,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:05,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:05,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303263238] [2020-12-23 13:01:05,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696934593] [2020-12-23 13:01:05,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:05,477 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:05,477 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:05,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:05,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:05,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:05,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:05,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403010971] [2020-12-23 13:01:05,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:05,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:05,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:05,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:05,680 INFO L87 Difference]: Start difference. First operand 150 states and 396 transitions. Second operand 16 states. [2020-12-23 13:01:06,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:06,100 INFO L93 Difference]: Finished difference Result 211 states and 513 transitions. [2020-12-23 13:01:06,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:01:06,101 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:06,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:06,102 INFO L225 Difference]: With dead ends: 211 [2020-12-23 13:01:06,102 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 13:01:06,103 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 [2020-12-23 13:01:06,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 13:01:06,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 153. [2020-12-23 13:01:06,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 13:01:06,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 408 transitions. [2020-12-23 13:01:06,108 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 408 transitions. Word has length 13 [2020-12-23 13:01:06,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:06,108 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 408 transitions. [2020-12-23 13:01:06,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:06,108 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 408 transitions. [2020-12-23 13:01:06,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:06,109 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:06,109 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:06,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:06,321 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:06,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:06,322 INFO L82 PathProgramCache]: Analyzing trace with hash -265602344, now seen corresponding path program 39 times [2020-12-23 13:01:06,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:06,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959936957] [2020-12-23 13:01:06,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:06,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:06,404 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:06,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959936957] [2020-12-23 13:01:06,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978923510] [2020-12-23 13:01:06,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:06,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:06,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:06,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:01:06,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:06,608 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:06,610 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:06,611 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:06,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:06,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:06,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:06,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795252849] [2020-12-23 13:01:06,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:06,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:06,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:06,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:06,635 INFO L87 Difference]: Start difference. First operand 153 states and 408 transitions. Second operand 16 states. [2020-12-23 13:01:07,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:07,245 INFO L93 Difference]: Finished difference Result 249 states and 604 transitions. [2020-12-23 13:01:07,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:01:07,245 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:07,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:07,247 INFO L225 Difference]: With dead ends: 249 [2020-12-23 13:01:07,247 INFO L226 Difference]: Without dead ends: 237 [2020-12-23 13:01:07,247 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 [2020-12-23 13:01:07,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-23 13:01:07,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 148. [2020-12-23 13:01:07,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-23 13:01:07,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 399 transitions. [2020-12-23 13:01:07,252 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 399 transitions. Word has length 13 [2020-12-23 13:01:07,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:07,252 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 399 transitions. [2020-12-23 13:01:07,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:07,253 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 399 transitions. [2020-12-23 13:01:07,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:07,253 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:07,253 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:07,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 13:01:07,467 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:07,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:07,468 INFO L82 PathProgramCache]: Analyzing trace with hash -539778060, now seen corresponding path program 40 times [2020-12-23 13:01:07,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:07,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759788497] [2020-12-23 13:01:07,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:07,567 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:07,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759788497] [2020-12-23 13:01:07,568 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974047622] [2020-12-23 13:01:07,568 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:07,637 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:07,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:07,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:07,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:07,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:07,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:07,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:07,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650916057] [2020-12-23 13:01:07,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:07,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:07,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:07,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:07,793 INFO L87 Difference]: Start difference. First operand 148 states and 399 transitions. Second operand 16 states. [2020-12-23 13:01:08,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:08,098 INFO L93 Difference]: Finished difference Result 213 states and 526 transitions. [2020-12-23 13:01:08,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:01:08,099 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:08,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:08,100 INFO L225 Difference]: With dead ends: 213 [2020-12-23 13:01:08,100 INFO L226 Difference]: Without dead ends: 211 [2020-12-23 13:01:08,101 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 [2020-12-23 13:01:08,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-23 13:01:08,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 154. [2020-12-23 13:01:08,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-23 13:01:08,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 409 transitions. [2020-12-23 13:01:08,105 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 409 transitions. Word has length 13 [2020-12-23 13:01:08,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:08,105 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 409 transitions. [2020-12-23 13:01:08,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:08,105 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 409 transitions. [2020-12-23 13:01:08,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:08,106 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:08,106 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:08,319 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 13:01:08,320 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:08,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:08,320 INFO L82 PathProgramCache]: Analyzing trace with hash -539691570, now seen corresponding path program 41 times [2020-12-23 13:01:08,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:08,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599680582] [2020-12-23 13:01:08,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:08,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:08,424 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:08,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599680582] [2020-12-23 13:01:08,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971160554] [2020-12-23 13:01:08,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:08,496 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:08,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:08,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:08,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:08,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:08,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:08,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106858098] [2020-12-23 13:01:08,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:08,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:08,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:08,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:08,645 INFO L87 Difference]: Start difference. First operand 154 states and 409 transitions. Second operand 16 states. [2020-12-23 13:01:08,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:08,937 INFO L93 Difference]: Finished difference Result 206 states and 513 transitions. [2020-12-23 13:01:08,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:01:08,937 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:08,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:08,939 INFO L225 Difference]: With dead ends: 206 [2020-12-23 13:01:08,939 INFO L226 Difference]: Without dead ends: 204 [2020-12-23 13:01:08,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:01:08,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-12-23 13:01:08,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-12-23 13:01:08,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-23 13:01:08,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 409 transitions. [2020-12-23 13:01:08,948 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 409 transitions. Word has length 13 [2020-12-23 13:01:08,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:08,948 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 409 transitions. [2020-12-23 13:01:08,948 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:08,949 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 409 transitions. [2020-12-23 13:01:08,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:08,949 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:08,949 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:09,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 13:01:09,163 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:09,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:09,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1841716828, now seen corresponding path program 42 times [2020-12-23 13:01:09,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:09,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993415138] [2020-12-23 13:01:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:09,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:09,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993415138] [2020-12-23 13:01:09,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633668270] [2020-12-23 13:01:09,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:09,324 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:01:09,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:09,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:09,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:09,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:09,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:09,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977760382] [2020-12-23 13:01:09,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:09,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:09,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:09,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:09,473 INFO L87 Difference]: Start difference. First operand 154 states and 409 transitions. Second operand 16 states. [2020-12-23 13:01:09,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:09,791 INFO L93 Difference]: Finished difference Result 225 states and 550 transitions. [2020-12-23 13:01:09,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:09,791 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:09,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:09,793 INFO L225 Difference]: With dead ends: 225 [2020-12-23 13:01:09,793 INFO L226 Difference]: Without dead ends: 223 [2020-12-23 13:01:09,793 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 [2020-12-23 13:01:09,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-23 13:01:09,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 156. [2020-12-23 13:01:09,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-12-23 13:01:09,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 414 transitions. [2020-12-23 13:01:09,798 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 414 transitions. Word has length 13 [2020-12-23 13:01:09,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:09,799 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 414 transitions. [2020-12-23 13:01:09,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:09,799 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 414 transitions. [2020-12-23 13:01:09,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:09,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:09,800 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:10,013 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:10,014 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:10,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:10,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1841803318, now seen corresponding path program 43 times [2020-12-23 13:01:10,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:10,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104678417] [2020-12-23 13:01:10,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:10,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:10,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104678417] [2020-12-23 13:01:10,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156598115] [2020-12-23 13:01:10,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:10,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:10,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:10,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:10,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:10,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:10,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:10,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537020458] [2020-12-23 13:01:10,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:10,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:10,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:10,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:10,347 INFO L87 Difference]: Start difference. First operand 156 states and 414 transitions. Second operand 16 states. [2020-12-23 13:01:10,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:10,675 INFO L93 Difference]: Finished difference Result 215 states and 530 transitions. [2020-12-23 13:01:10,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:10,675 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:10,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:10,677 INFO L225 Difference]: With dead ends: 215 [2020-12-23 13:01:10,677 INFO L226 Difference]: Without dead ends: 213 [2020-12-23 13:01:10,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=393, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:01:10,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-23 13:01:10,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 155. [2020-12-23 13:01:10,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 13:01:10,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 411 transitions. [2020-12-23 13:01:10,682 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 411 transitions. Word has length 13 [2020-12-23 13:01:10,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:10,682 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 411 transitions. [2020-12-23 13:01:10,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:10,682 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 411 transitions. [2020-12-23 13:01:10,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:10,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:10,683 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:10,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:10,899 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:10,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:10,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1860485158, now seen corresponding path program 44 times [2020-12-23 13:01:10,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:10,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328651307] [2020-12-23 13:01:10,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:10,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:10,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328651307] [2020-12-23 13:01:10,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450220905] [2020-12-23 13:01:10,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:11,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:11,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:11,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:11,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:11,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:11,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:11,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:11,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937508249] [2020-12-23 13:01:11,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:11,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:11,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:11,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:11,215 INFO L87 Difference]: Start difference. First operand 155 states and 411 transitions. Second operand 16 states. [2020-12-23 13:01:11,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:11,640 INFO L93 Difference]: Finished difference Result 225 states and 543 transitions. [2020-12-23 13:01:11,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:11,640 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:11,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:11,642 INFO L225 Difference]: With dead ends: 225 [2020-12-23 13:01:11,642 INFO L226 Difference]: Without dead ends: 223 [2020-12-23 13:01:11,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=209, Invalid=493, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:01:11,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-23 13:01:11,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 157. [2020-12-23 13:01:11,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 13:01:11,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 418 transitions. [2020-12-23 13:01:11,647 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 418 transitions. Word has length 13 [2020-12-23 13:01:11,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:11,647 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 418 transitions. [2020-12-23 13:01:11,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:11,647 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 418 transitions. [2020-12-23 13:01:11,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:11,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:11,648 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:11,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:11,862 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:11,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:11,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1861177078, now seen corresponding path program 45 times [2020-12-23 13:01:11,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:11,863 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292222529] [2020-12-23 13:01:11,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:11,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:11,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:11,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292222529] [2020-12-23 13:01:11,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298192472] [2020-12-23 13:01:11,961 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:12,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:01:12,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:12,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:12,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:12,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:12,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:12,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:12,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549519258] [2020-12-23 13:01:12,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:12,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:12,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:12,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:12,160 INFO L87 Difference]: Start difference. First operand 157 states and 418 transitions. Second operand 16 states. [2020-12-23 13:01:12,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:12,664 INFO L93 Difference]: Finished difference Result 226 states and 554 transitions. [2020-12-23 13:01:12,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:12,664 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:12,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:12,666 INFO L225 Difference]: With dead ends: 226 [2020-12-23 13:01:12,666 INFO L226 Difference]: Without dead ends: 224 [2020-12-23 13:01:12,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:01:12,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-23 13:01:12,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 160. [2020-12-23 13:01:12,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 13:01:12,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 430 transitions. [2020-12-23 13:01:12,672 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 430 transitions. Word has length 13 [2020-12-23 13:01:12,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:12,672 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 430 transitions. [2020-12-23 13:01:12,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:12,673 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 430 transitions. [2020-12-23 13:01:12,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:12,673 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:12,673 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:12,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:12,888 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:12,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:12,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1861199398, now seen corresponding path program 46 times [2020-12-23 13:01:12,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:12,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190757467] [2020-12-23 13:01:12,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:12,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:12,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190757467] [2020-12-23 13:01:12,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1757457074] [2020-12-23 13:01:12,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:13,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:13,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:13,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:13,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:13,181 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:13,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:13,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:13,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527543025] [2020-12-23 13:01:13,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:13,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:13,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:13,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:13,183 INFO L87 Difference]: Start difference. First operand 160 states and 430 transitions. Second operand 16 states. [2020-12-23 13:01:13,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:13,971 INFO L93 Difference]: Finished difference Result 276 states and 671 transitions. [2020-12-23 13:01:13,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 13:01:13,972 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:13,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:13,973 INFO L225 Difference]: With dead ends: 276 [2020-12-23 13:01:13,973 INFO L226 Difference]: Without dead ends: 264 [2020-12-23 13:01:13,974 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=408, Invalid=998, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:01:13,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-23 13:01:13,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 154. [2020-12-23 13:01:13,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-12-23 13:01:13,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 412 transitions. [2020-12-23 13:01:13,978 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 412 transitions. Word has length 13 [2020-12-23 13:01:13,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:13,978 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 412 transitions. [2020-12-23 13:01:13,978 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:13,979 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 412 transitions. [2020-12-23 13:01:13,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:13,979 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:13,979 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:14,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-12-23 13:01:14,193 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:14,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:14,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1863252838, now seen corresponding path program 47 times [2020-12-23 13:01:14,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:14,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439011674] [2020-12-23 13:01:14,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:14,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:14,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439011674] [2020-12-23 13:01:14,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509134265] [2020-12-23 13:01:14,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:14,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:14,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:14,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:14,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:14,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:14,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:14,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:14,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532083768] [2020-12-23 13:01:14,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:14,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:14,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:14,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:14,509 INFO L87 Difference]: Start difference. First operand 154 states and 412 transitions. Second operand 16 states. [2020-12-23 13:01:14,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:14,978 INFO L93 Difference]: Finished difference Result 230 states and 561 transitions. [2020-12-23 13:01:14,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:01:14,979 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:14,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:14,980 INFO L225 Difference]: With dead ends: 230 [2020-12-23 13:01:14,981 INFO L226 Difference]: Without dead ends: 228 [2020-12-23 13:01:14,981 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 [2020-12-23 13:01:14,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-12-23 13:01:14,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 155. [2020-12-23 13:01:14,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 13:01:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 417 transitions. [2020-12-23 13:01:14,986 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 417 transitions. Word has length 13 [2020-12-23 13:01:14,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:14,986 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 417 transitions. [2020-12-23 13:01:14,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:14,986 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 417 transitions. [2020-12-23 13:01:14,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:14,987 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:14,987 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:15,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:15,200 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:15,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:15,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1863858268, now seen corresponding path program 48 times [2020-12-23 13:01:15,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:15,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2088225217] [2020-12-23 13:01:15,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:15,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2088225217] [2020-12-23 13:01:15,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909492121] [2020-12-23 13:01:15,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:15,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:15,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:15,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:15,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:15,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:15,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:15,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503432878] [2020-12-23 13:01:15,503 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:15,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:15,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:15,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:15,504 INFO L87 Difference]: Start difference. First operand 155 states and 417 transitions. Second operand 16 states. [2020-12-23 13:01:16,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:16,008 INFO L93 Difference]: Finished difference Result 222 states and 545 transitions. [2020-12-23 13:01:16,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:16,009 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:16,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:16,011 INFO L225 Difference]: With dead ends: 222 [2020-12-23 13:01:16,011 INFO L226 Difference]: Without dead ends: 220 [2020-12-23 13:01:16,011 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 [2020-12-23 13:01:16,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-23 13:01:16,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 157. [2020-12-23 13:01:16,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 13:01:16,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 424 transitions. [2020-12-23 13:01:16,015 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 424 transitions. Word has length 13 [2020-12-23 13:01:16,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:16,016 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 424 transitions. [2020-12-23 13:01:16,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:16,016 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 424 transitions. [2020-12-23 13:01:16,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:16,016 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:16,016 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:16,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 13:01:16,217 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:16,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:16,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1863877705, now seen corresponding path program 49 times [2020-12-23 13:01:16,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:16,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027694986] [2020-12-23 13:01:16,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:16,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:16,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:16,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027694986] [2020-12-23 13:01:16,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790474266] [2020-12-23 13:01:16,319 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:16,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:16,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:16,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:16,505 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:16,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:16,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:16,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973675199] [2020-12-23 13:01:16,529 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:16,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:16,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:16,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:16,530 INFO L87 Difference]: Start difference. First operand 157 states and 424 transitions. Second operand 16 states. [2020-12-23 13:01:17,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:17,331 INFO L93 Difference]: Finished difference Result 266 states and 648 transitions. [2020-12-23 13:01:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 13:01:17,331 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:17,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:17,333 INFO L225 Difference]: With dead ends: 266 [2020-12-23 13:01:17,333 INFO L226 Difference]: Without dead ends: 254 [2020-12-23 13:01:17,334 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 [2020-12-23 13:01:17,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-23 13:01:17,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 153. [2020-12-23 13:01:17,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 13:01:17,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 411 transitions. [2020-12-23 13:01:17,338 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 411 transitions. Word has length 13 [2020-12-23 13:01:17,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:17,339 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 411 transitions. [2020-12-23 13:01:17,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:17,339 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 411 transitions. [2020-12-23 13:01:17,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:17,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:17,340 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:17,553 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:17,554 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:17,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:17,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1951482845, now seen corresponding path program 50 times [2020-12-23 13:01:17,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:17,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978171009] [2020-12-23 13:01:17,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:17,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:17,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:17,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978171009] [2020-12-23 13:01:17,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004104004] [2020-12-23 13:01:17,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:17,700 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:17,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:17,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:17,701 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:17,829 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:17,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:17,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:17,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929674589] [2020-12-23 13:01:17,830 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:17,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:17,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:17,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:17,831 INFO L87 Difference]: Start difference. First operand 153 states and 411 transitions. Second operand 16 states. [2020-12-23 13:01:18,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:18,015 INFO L93 Difference]: Finished difference Result 202 states and 511 transitions. [2020-12-23 13:01:18,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:01:18,015 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:18,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:18,017 INFO L225 Difference]: With dead ends: 202 [2020-12-23 13:01:18,017 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 13:01:18,017 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 [2020-12-23 13:01:18,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 13:01:18,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 155. [2020-12-23 13:01:18,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 13:01:18,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 416 transitions. [2020-12-23 13:01:18,022 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 416 transitions. Word has length 13 [2020-12-23 13:01:18,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:18,022 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 416 transitions. [2020-12-23 13:01:18,022 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:18,022 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 416 transitions. [2020-12-23 13:01:18,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:18,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:18,023 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:18,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 13:01:18,239 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:18,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:18,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1951485728, now seen corresponding path program 51 times [2020-12-23 13:01:18,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:18,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808368216] [2020-12-23 13:01:18,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:18,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:18,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:18,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808368216] [2020-12-23 13:01:18,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849530954] [2020-12-23 13:01:18,339 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:18,407 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:18,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:18,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:18,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:18,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:18,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:18,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:18,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500100712] [2020-12-23 13:01:18,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:18,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:18,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:18,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:18,561 INFO L87 Difference]: Start difference. First operand 155 states and 416 transitions. Second operand 16 states. [2020-12-23 13:01:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:18,825 INFO L93 Difference]: Finished difference Result 210 states and 528 transitions. [2020-12-23 13:01:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:01:18,825 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:18,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:18,827 INFO L225 Difference]: With dead ends: 210 [2020-12-23 13:01:18,827 INFO L226 Difference]: Without dead ends: 208 [2020-12-23 13:01:18,828 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 [2020-12-23 13:01:18,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-23 13:01:18,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 158. [2020-12-23 13:01:18,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-23 13:01:18,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 424 transitions. [2020-12-23 13:01:18,831 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 424 transitions. Word has length 13 [2020-12-23 13:01:18,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:18,831 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 424 transitions. [2020-12-23 13:01:18,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:18,832 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 424 transitions. [2020-12-23 13:01:18,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:18,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:18,832 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:19,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:19,046 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:19,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:19,047 INFO L82 PathProgramCache]: Analyzing trace with hash 1951572218, now seen corresponding path program 52 times [2020-12-23 13:01:19,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:19,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834450502] [2020-12-23 13:01:19,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:19,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:19,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:19,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834450502] [2020-12-23 13:01:19,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559263557] [2020-12-23 13:01:19,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:19,196 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:19,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:19,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:19,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:19,337 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:19,338 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:19,338 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:19,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410461282] [2020-12-23 13:01:19,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:19,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:19,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:19,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=164, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:19,340 INFO L87 Difference]: Start difference. First operand 158 states and 424 transitions. Second operand 16 states. [2020-12-23 13:01:19,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:19,544 INFO L93 Difference]: Finished difference Result 208 states and 524 transitions. [2020-12-23 13:01:19,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:01:19,545 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:19,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:19,547 INFO L225 Difference]: With dead ends: 208 [2020-12-23 13:01:19,547 INFO L226 Difference]: Without dead ends: 206 [2020-12-23 13:01:19,547 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=158, Invalid=304, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:01:19,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-23 13:01:19,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 159. [2020-12-23 13:01:19,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 13:01:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 426 transitions. [2020-12-23 13:01:19,551 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 426 transitions. Word has length 13 [2020-12-23 13:01:19,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:19,552 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 426 transitions. [2020-12-23 13:01:19,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 426 transitions. [2020-12-23 13:01:19,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:19,553 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:19,553 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:19,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:19,769 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:19,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:19,770 INFO L82 PathProgramCache]: Analyzing trace with hash -1531586955, now seen corresponding path program 53 times [2020-12-23 13:01:19,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:19,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917652264] [2020-12-23 13:01:19,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:19,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:19,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:19,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917652264] [2020-12-23 13:01:19,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584777635] [2020-12-23 13:01:19,848 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:19,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:19,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:19,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:19,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:20,058 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:20,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:20,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:20,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401413346] [2020-12-23 13:01:20,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:20,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:20,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:20,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:20,060 INFO L87 Difference]: Start difference. First operand 159 states and 426 transitions. Second operand 16 states. [2020-12-23 13:01:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:20,293 INFO L93 Difference]: Finished difference Result 217 states and 541 transitions. [2020-12-23 13:01:20,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:01:20,293 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:20,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:20,295 INFO L225 Difference]: With dead ends: 217 [2020-12-23 13:01:20,295 INFO L226 Difference]: Without dead ends: 215 [2020-12-23 13:01:20,296 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 [2020-12-23 13:01:20,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-23 13:01:20,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 159. [2020-12-23 13:01:20,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 13:01:20,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 426 transitions. [2020-12-23 13:01:20,300 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 426 transitions. Word has length 13 [2020-12-23 13:01:20,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:20,300 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 426 transitions. [2020-12-23 13:01:20,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:20,301 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 426 transitions. [2020-12-23 13:01:20,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:20,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:20,301 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:20,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-23 13:01:20,517 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:20,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:20,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1531584072, now seen corresponding path program 54 times [2020-12-23 13:01:20,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:20,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429166407] [2020-12-23 13:01:20,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:20,609 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:20,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429166407] [2020-12-23 13:01:20,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348470560] [2020-12-23 13:01:20,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:20,685 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:20,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:20,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:20,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:20,830 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:20,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:20,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:20,831 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802825274] [2020-12-23 13:01:20,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:20,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:20,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:20,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:20,832 INFO L87 Difference]: Start difference. First operand 159 states and 426 transitions. Second operand 16 states. [2020-12-23 13:01:21,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:21,150 INFO L93 Difference]: Finished difference Result 227 states and 562 transitions. [2020-12-23 13:01:21,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:01:21,151 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:21,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:21,152 INFO L225 Difference]: With dead ends: 227 [2020-12-23 13:01:21,152 INFO L226 Difference]: Without dead ends: 225 [2020-12-23 13:01:21,153 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 [2020-12-23 13:01:21,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-12-23 13:01:21,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 161. [2020-12-23 13:01:21,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-23 13:01:21,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 431 transitions. [2020-12-23 13:01:21,158 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 431 transitions. Word has length 13 [2020-12-23 13:01:21,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:21,158 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 431 transitions. [2020-12-23 13:01:21,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:21,158 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 431 transitions. [2020-12-23 13:01:21,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:21,159 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:21,159 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:21,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:21,364 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:21,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1531497582, now seen corresponding path program 55 times [2020-12-23 13:01:21,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:21,365 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455482833] [2020-12-23 13:01:21,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:21,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:21,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455482833] [2020-12-23 13:01:21,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450108086] [2020-12-23 13:01:21,463 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:21,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:21,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:21,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:21,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:21,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:21,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:21,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671617528] [2020-12-23 13:01:21,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:21,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:21,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:21,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:21,676 INFO L87 Difference]: Start difference. First operand 161 states and 431 transitions. Second operand 16 states. [2020-12-23 13:01:21,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:21,964 INFO L93 Difference]: Finished difference Result 221 states and 550 transitions. [2020-12-23 13:01:21,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:01:21,964 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:21,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:21,966 INFO L225 Difference]: With dead ends: 221 [2020-12-23 13:01:21,966 INFO L226 Difference]: Without dead ends: 219 [2020-12-23 13:01:21,967 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 [2020-12-23 13:01:21,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-12-23 13:01:21,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 157. [2020-12-23 13:01:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 13:01:21,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 421 transitions. [2020-12-23 13:01:21,970 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 421 transitions. Word has length 13 [2020-12-23 13:01:21,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:21,970 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 421 transitions. [2020-12-23 13:01:21,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:21,971 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 421 transitions. [2020-12-23 13:01:21,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:21,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:21,971 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:22,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:22,186 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:22,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:22,186 INFO L82 PathProgramCache]: Analyzing trace with hash -949768725, now seen corresponding path program 56 times [2020-12-23 13:01:22,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:22,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403201518] [2020-12-23 13:01:22,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:22,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:22,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403201518] [2020-12-23 13:01:22,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2055132280] [2020-12-23 13:01:22,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:22,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:22,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:22,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:22,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:22,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:22,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:22,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:22,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827838584] [2020-12-23 13:01:22,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:22,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:22,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:22,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:22,500 INFO L87 Difference]: Start difference. First operand 157 states and 421 transitions. Second operand 16 states. [2020-12-23 13:01:22,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:22,752 INFO L93 Difference]: Finished difference Result 215 states and 535 transitions. [2020-12-23 13:01:22,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:01:22,753 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:22,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:22,755 INFO L225 Difference]: With dead ends: 215 [2020-12-23 13:01:22,755 INFO L226 Difference]: Without dead ends: 213 [2020-12-23 13:01:22,755 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 [2020-12-23 13:01:22,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-23 13:01:22,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 157. [2020-12-23 13:01:22,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 13:01:22,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 421 transitions. [2020-12-23 13:01:22,763 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 421 transitions. Word has length 13 [2020-12-23 13:01:22,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:22,763 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 421 transitions. [2020-12-23 13:01:22,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:22,763 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 421 transitions. [2020-12-23 13:01:22,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:22,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:22,764 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:22,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-23 13:01:22,978 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:22,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:22,978 INFO L82 PathProgramCache]: Analyzing trace with hash -949765842, now seen corresponding path program 57 times [2020-12-23 13:01:22,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:22,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882767901] [2020-12-23 13:01:22,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:22,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:23,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:23,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882767901] [2020-12-23 13:01:23,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081127937] [2020-12-23 13:01:23,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:23,137 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:23,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:23,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:23,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:23,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:23,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:23,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:23,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446727923] [2020-12-23 13:01:23,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:23,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:23,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:23,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:23,306 INFO L87 Difference]: Start difference. First operand 157 states and 421 transitions. Second operand 16 states. [2020-12-23 13:01:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:23,641 INFO L93 Difference]: Finished difference Result 230 states and 563 transitions. [2020-12-23 13:01:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:23,641 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:23,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:23,643 INFO L225 Difference]: With dead ends: 230 [2020-12-23 13:01:23,643 INFO L226 Difference]: Without dead ends: 228 [2020-12-23 13:01:23,644 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 [2020-12-23 13:01:23,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-12-23 13:01:23,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 157. [2020-12-23 13:01:23,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 13:01:23,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 421 transitions. [2020-12-23 13:01:23,647 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 421 transitions. Word has length 13 [2020-12-23 13:01:23,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:23,647 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 421 transitions. [2020-12-23 13:01:23,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:23,647 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 421 transitions. [2020-12-23 13:01:23,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:23,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:23,648 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:23,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:23,852 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:23,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:23,853 INFO L82 PathProgramCache]: Analyzing trace with hash -949679352, now seen corresponding path program 58 times [2020-12-23 13:01:23,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:23,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391061417] [2020-12-23 13:01:23,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:23,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:23,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:23,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391061417] [2020-12-23 13:01:23,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845644881] [2020-12-23 13:01:23,941 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:24,002 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:24,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:24,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:24,003 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:24,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:24,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:24,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892157098] [2020-12-23 13:01:24,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:24,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:24,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:24,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:24,164 INFO L87 Difference]: Start difference. First operand 157 states and 421 transitions. Second operand 16 states. [2020-12-23 13:01:24,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:24,484 INFO L93 Difference]: Finished difference Result 228 states and 560 transitions. [2020-12-23 13:01:24,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:24,484 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:24,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:24,486 INFO L225 Difference]: With dead ends: 228 [2020-12-23 13:01:24,486 INFO L226 Difference]: Without dead ends: 226 [2020-12-23 13:01:24,487 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 [2020-12-23 13:01:24,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-12-23 13:01:24,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 155. [2020-12-23 13:01:24,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 13:01:24,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 416 transitions. [2020-12-23 13:01:24,491 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 416 transitions. Word has length 13 [2020-12-23 13:01:24,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:24,491 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 416 transitions. [2020-12-23 13:01:24,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:24,492 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 416 transitions. [2020-12-23 13:01:24,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:24,492 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:24,492 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:24,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-12-23 13:01:24,705 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:24,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:24,706 INFO L82 PathProgramCache]: Analyzing trace with hash -931000395, now seen corresponding path program 59 times [2020-12-23 13:01:24,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:24,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282916184] [2020-12-23 13:01:24,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:24,779 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:24,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282916184] [2020-12-23 13:01:24,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044595002] [2020-12-23 13:01:24,780 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:24,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:24,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:24,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:24,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:24,998 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:24,998 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:24,998 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:24,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560327381] [2020-12-23 13:01:24,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:24,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:24,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:25,000 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:25,000 INFO L87 Difference]: Start difference. First operand 155 states and 416 transitions. Second operand 16 states. [2020-12-23 13:01:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:25,305 INFO L93 Difference]: Finished difference Result 226 states and 552 transitions. [2020-12-23 13:01:25,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:01:25,305 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:25,307 INFO L225 Difference]: With dead ends: 226 [2020-12-23 13:01:25,307 INFO L226 Difference]: Without dead ends: 224 [2020-12-23 13:01:25,307 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 [2020-12-23 13:01:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-12-23 13:01:25,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 155. [2020-12-23 13:01:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 13:01:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 416 transitions. [2020-12-23 13:01:25,311 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 416 transitions. Word has length 13 [2020-12-23 13:01:25,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:25,311 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 416 transitions. [2020-12-23 13:01:25,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 416 transitions. [2020-12-23 13:01:25,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:25,312 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:25,312 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:25,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-23 13:01:25,526 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:25,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:25,527 INFO L82 PathProgramCache]: Analyzing trace with hash -930997512, now seen corresponding path program 60 times [2020-12-23 13:01:25,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:25,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781788494] [2020-12-23 13:01:25,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:25,615 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:25,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781788494] [2020-12-23 13:01:25,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093495689] [2020-12-23 13:01:25,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:25,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:25,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:25,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:25,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:25,837 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:25,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:25,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:25,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127920900] [2020-12-23 13:01:25,838 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:25,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:25,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:25,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:25,839 INFO L87 Difference]: Start difference. First operand 155 states and 416 transitions. Second operand 16 states. [2020-12-23 13:01:26,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:26,291 INFO L93 Difference]: Finished difference Result 240 states and 583 transitions. [2020-12-23 13:01:26,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:01:26,292 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:26,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:26,294 INFO L225 Difference]: With dead ends: 240 [2020-12-23 13:01:26,294 INFO L226 Difference]: Without dead ends: 238 [2020-12-23 13:01:26,294 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 [2020-12-23 13:01:26,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-23 13:01:26,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 157. [2020-12-23 13:01:26,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 13:01:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 423 transitions. [2020-12-23 13:01:26,298 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 423 transitions. Word has length 13 [2020-12-23 13:01:26,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:26,298 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 423 transitions. [2020-12-23 13:01:26,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:26,298 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 423 transitions. [2020-12-23 13:01:26,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:26,298 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:26,299 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:26,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-23 13:01:26,511 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:26,512 INFO L82 PathProgramCache]: Analyzing trace with hash -930394965, now seen corresponding path program 61 times [2020-12-23 13:01:26,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:26,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792655202] [2020-12-23 13:01:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:26,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:26,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:26,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792655202] [2020-12-23 13:01:26,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614117560] [2020-12-23 13:01:26,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:26,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:26,653 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:26,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:26,793 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:26,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:26,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:26,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285885914] [2020-12-23 13:01:26,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:26,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:26,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:26,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:26,795 INFO L87 Difference]: Start difference. First operand 157 states and 423 transitions. Second operand 16 states. [2020-12-23 13:01:27,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:27,183 INFO L93 Difference]: Finished difference Result 222 states and 545 transitions. [2020-12-23 13:01:27,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:27,184 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:27,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:27,185 INFO L225 Difference]: With dead ends: 222 [2020-12-23 13:01:27,185 INFO L226 Difference]: Without dead ends: 220 [2020-12-23 13:01:27,186 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 [2020-12-23 13:01:27,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-12-23 13:01:27,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 159. [2020-12-23 13:01:27,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 13:01:27,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 430 transitions. [2020-12-23 13:01:27,189 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 430 transitions. Word has length 13 [2020-12-23 13:01:27,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:27,189 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 430 transitions. [2020-12-23 13:01:27,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:27,189 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 430 transitions. [2020-12-23 13:01:27,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:27,190 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:27,190 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:27,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:27,391 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:27,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:27,392 INFO L82 PathProgramCache]: Analyzing trace with hash -930375528, now seen corresponding path program 62 times [2020-12-23 13:01:27,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:27,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850803691] [2020-12-23 13:01:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:27,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:27,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850803691] [2020-12-23 13:01:27,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908822571] [2020-12-23 13:01:27,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:27,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:27,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:27,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:27,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:27,669 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:27,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:27,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:27,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:27,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357237695] [2020-12-23 13:01:27,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:27,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:27,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:27,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:27,690 INFO L87 Difference]: Start difference. First operand 159 states and 430 transitions. Second operand 16 states. [2020-12-23 13:01:28,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:28,176 INFO L93 Difference]: Finished difference Result 264 states and 639 transitions. [2020-12-23 13:01:28,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:28,177 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:28,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:28,179 INFO L225 Difference]: With dead ends: 264 [2020-12-23 13:01:28,179 INFO L226 Difference]: Without dead ends: 252 [2020-12-23 13:01:28,179 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 [2020-12-23 13:01:28,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-23 13:01:28,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 159. [2020-12-23 13:01:28,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 13:01:28,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 427 transitions. [2020-12-23 13:01:28,183 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 427 transitions. Word has length 13 [2020-12-23 13:01:28,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:28,183 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 427 transitions. [2020-12-23 13:01:28,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:28,183 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 427 transitions. [2020-12-23 13:01:28,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:28,184 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:28,184 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:28,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:28,385 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:28,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:28,386 INFO L82 PathProgramCache]: Analyzing trace with hash -930305592, now seen corresponding path program 63 times [2020-12-23 13:01:28,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:28,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292757746] [2020-12-23 13:01:28,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:28,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:28,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292757746] [2020-12-23 13:01:28,472 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726254448] [2020-12-23 13:01:28,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:28,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:28,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:28,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 13:01:28,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:28,671 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:28,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:28,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-12-23 13:01:28,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315577500] [2020-12-23 13:01:28,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:01:28,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:28,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:01:28,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:01:28,673 INFO L87 Difference]: Start difference. First operand 159 states and 427 transitions. Second operand 15 states. [2020-12-23 13:01:29,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:29,383 INFO L93 Difference]: Finished difference Result 266 states and 648 transitions. [2020-12-23 13:01:29,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 13:01:29,384 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-12-23 13:01:29,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:29,385 INFO L225 Difference]: With dead ends: 266 [2020-12-23 13:01:29,385 INFO L226 Difference]: Without dead ends: 262 [2020-12-23 13:01:29,385 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 [2020-12-23 13:01:29,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-23 13:01:29,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 162. [2020-12-23 13:01:29,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 13:01:29,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 439 transitions. [2020-12-23 13:01:29,389 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 439 transitions. Word has length 13 [2020-12-23 13:01:29,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:29,389 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 439 transitions. [2020-12-23 13:01:29,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:01:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 439 transitions. [2020-12-23 13:01:29,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:29,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:29,390 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:29,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:29,606 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:29,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:29,607 INFO L82 PathProgramCache]: Analyzing trace with hash -930283272, now seen corresponding path program 64 times [2020-12-23 13:01:29,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:29,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212008554] [2020-12-23 13:01:29,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:29,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:29,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:29,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212008554] [2020-12-23 13:01:29,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715267111] [2020-12-23 13:01:29,703 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:29,771 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:29,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:29,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:29,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:29,896 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:29,898 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:01:29,899 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:29,921 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:29,922 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:29,922 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:29,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732330955] [2020-12-23 13:01:29,922 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:29,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:29,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:29,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:29,923 INFO L87 Difference]: Start difference. First operand 162 states and 439 transitions. Second operand 16 states. [2020-12-23 13:01:30,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:30,797 INFO L93 Difference]: Finished difference Result 303 states and 727 transitions. [2020-12-23 13:01:30,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 13:01:30,798 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:30,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:30,800 INFO L225 Difference]: With dead ends: 303 [2020-12-23 13:01:30,800 INFO L226 Difference]: Without dead ends: 291 [2020-12-23 13:01:30,801 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 13:01:30,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-23 13:01:30,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 159. [2020-12-23 13:01:30,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 13:01:30,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 428 transitions. [2020-12-23 13:01:30,804 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 428 transitions. Word has length 13 [2020-12-23 13:01:30,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:30,804 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 428 transitions. [2020-12-23 13:01:30,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:30,805 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 428 transitions. [2020-12-23 13:01:30,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:30,805 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:30,805 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:31,006 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:31,006 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:31,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:31,007 INFO L82 PathProgramCache]: Analyzing trace with hash -928229832, now seen corresponding path program 65 times [2020-12-23 13:01:31,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:31,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430998476] [2020-12-23 13:01:31,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:31,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:31,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430998476] [2020-12-23 13:01:31,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616186176] [2020-12-23 13:01:31,103 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:31,162 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:31,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:31,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:31,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:31,302 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:31,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:31,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:31,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65525435] [2020-12-23 13:01:31,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:31,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:31,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:31,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:31,304 INFO L87 Difference]: Start difference. First operand 159 states and 428 transitions. Second operand 16 states. [2020-12-23 13:01:31,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:31,741 INFO L93 Difference]: Finished difference Result 246 states and 601 transitions. [2020-12-23 13:01:31,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:01:31,742 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:31,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:31,744 INFO L225 Difference]: With dead ends: 246 [2020-12-23 13:01:31,744 INFO L226 Difference]: Without dead ends: 244 [2020-12-23 13:01:31,744 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 [2020-12-23 13:01:31,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-23 13:01:31,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 159. [2020-12-23 13:01:31,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 13:01:31,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 431 transitions. [2020-12-23 13:01:31,749 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 431 transitions. Word has length 13 [2020-12-23 13:01:31,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:31,749 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 431 transitions. [2020-12-23 13:01:31,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:31,749 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 431 transitions. [2020-12-23 13:01:31,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:31,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:31,750 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:31,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-12-23 13:01:31,963 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:31,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:31,963 INFO L82 PathProgramCache]: Analyzing trace with hash -927624402, now seen corresponding path program 66 times [2020-12-23 13:01:31,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:31,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015958322] [2020-12-23 13:01:31,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:31,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:32,062 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:32,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015958322] [2020-12-23 13:01:32,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729312839] [2020-12-23 13:01:32,063 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:32,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:32,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:32,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:32,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:32,290 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:32,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:32,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:32,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532155094] [2020-12-23 13:01:32,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:32,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:32,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:32,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:32,292 INFO L87 Difference]: Start difference. First operand 159 states and 431 transitions. Second operand 16 states. [2020-12-23 13:01:32,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:32,828 INFO L93 Difference]: Finished difference Result 243 states and 596 transitions. [2020-12-23 13:01:32,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:32,829 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:32,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:32,830 INFO L225 Difference]: With dead ends: 243 [2020-12-23 13:01:32,830 INFO L226 Difference]: Without dead ends: 241 [2020-12-23 13:01:32,831 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:01:32,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-23 13:01:32,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 161. [2020-12-23 13:01:32,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-12-23 13:01:32,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 438 transitions. [2020-12-23 13:01:32,837 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 438 transitions. Word has length 13 [2020-12-23 13:01:32,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:32,837 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 438 transitions. [2020-12-23 13:01:32,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:32,838 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 438 transitions. [2020-12-23 13:01:32,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:32,839 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:32,839 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:33,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:33,054 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:33,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:33,055 INFO L82 PathProgramCache]: Analyzing trace with hash -927604965, now seen corresponding path program 67 times [2020-12-23 13:01:33,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:33,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594634549] [2020-12-23 13:01:33,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:33,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:33,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:33,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594634549] [2020-12-23 13:01:33,156 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037306449] [2020-12-23 13:01:33,156 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:33,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:33,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:33,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:33,338 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:33,358 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:33,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:33,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:33,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406089565] [2020-12-23 13:01:33,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:33,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:33,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:33,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:33,360 INFO L87 Difference]: Start difference. First operand 161 states and 438 transitions. Second operand 16 states. [2020-12-23 13:01:34,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:34,104 INFO L93 Difference]: Finished difference Result 291 states and 706 transitions. [2020-12-23 13:01:34,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 13:01:34,105 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:34,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:34,107 INFO L225 Difference]: With dead ends: 291 [2020-12-23 13:01:34,107 INFO L226 Difference]: Without dead ends: 279 [2020-12-23 13:01:34,108 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 [2020-12-23 13:01:34,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-23 13:01:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 158. [2020-12-23 13:01:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-23 13:01:34,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 426 transitions. [2020-12-23 13:01:34,113 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 426 transitions. Word has length 13 [2020-12-23 13:01:34,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:34,113 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 426 transitions. [2020-12-23 13:01:34,113 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:34,113 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 426 transitions. [2020-12-23 13:01:34,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:34,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:34,114 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:34,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:34,328 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:34,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:34,329 INFO L82 PathProgramCache]: Analyzing trace with hash -841628139, now seen corresponding path program 68 times [2020-12-23 13:01:34,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:34,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379564087] [2020-12-23 13:01:34,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:34,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:34,415 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:34,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379564087] [2020-12-23 13:01:34,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107489273] [2020-12-23 13:01:34,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:34,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:34,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:34,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:01:34,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:34,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:34,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2020-12-23 13:01:34,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692638785] [2020-12-23 13:01:34,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:01:34,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:34,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:01:34,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:01:34,557 INFO L87 Difference]: Start difference. First operand 158 states and 426 transitions. Second operand 12 states. [2020-12-23 13:01:34,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:34,793 INFO L93 Difference]: Finished difference Result 268 states and 657 transitions. [2020-12-23 13:01:34,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:34,794 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2020-12-23 13:01:34,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:34,796 INFO L225 Difference]: With dead ends: 268 [2020-12-23 13:01:34,796 INFO L226 Difference]: Without dead ends: 256 [2020-12-23 13:01:34,796 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 [2020-12-23 13:01:34,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-23 13:01:34,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 158. [2020-12-23 13:01:34,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-23 13:01:34,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 424 transitions. [2020-12-23 13:01:34,801 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 424 transitions. Word has length 13 [2020-12-23 13:01:34,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:34,801 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 424 transitions. [2020-12-23 13:01:34,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:01:34,801 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 424 transitions. [2020-12-23 13:01:34,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:34,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:34,802 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:35,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:35,017 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:35,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:35,017 INFO L82 PathProgramCache]: Analyzing trace with hash 864112436, now seen corresponding path program 15 times [2020-12-23 13:01:35,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:35,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870627784] [2020-12-23 13:01:35,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:35,118 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:35,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870627784] [2020-12-23 13:01:35,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847700407] [2020-12-23 13:01:35,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:35,182 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 13:01:35,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:35,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:35,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:35,382 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:35,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:35,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:35,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304178300] [2020-12-23 13:01:35,383 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:35,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:35,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:35,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:35,383 INFO L87 Difference]: Start difference. First operand 158 states and 424 transitions. Second operand 17 states. [2020-12-23 13:01:35,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:35,443 INFO L93 Difference]: Finished difference Result 203 states and 520 transitions. [2020-12-23 13:01:35,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:01:35,444 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-23 13:01:35,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:35,446 INFO L225 Difference]: With dead ends: 203 [2020-12-23 13:01:35,446 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 13:01:35,446 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 [2020-12-23 13:01:35,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 13:01:35,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 167. [2020-12-23 13:01:35,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 13:01:35,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 444 transitions. [2020-12-23 13:01:35,450 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 444 transitions. Word has length 13 [2020-12-23 13:01:35,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:35,450 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 444 transitions. [2020-12-23 13:01:35,450 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:35,450 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 444 transitions. [2020-12-23 13:01:35,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:35,451 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:35,451 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:35,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:35,664 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:35,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:35,665 INFO L82 PathProgramCache]: Analyzing trace with hash 263131036, now seen corresponding path program 16 times [2020-12-23 13:01:35,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:35,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720689363] [2020-12-23 13:01:35,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:35,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720689363] [2020-12-23 13:01:35,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687842866] [2020-12-23 13:01:35,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:35,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:35,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:35,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:35,842 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:36,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:36,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:36,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053574127] [2020-12-23 13:01:36,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:36,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:36,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:36,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:36,017 INFO L87 Difference]: Start difference. First operand 167 states and 444 transitions. Second operand 17 states. [2020-12-23 13:01:36,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:36,118 INFO L93 Difference]: Finished difference Result 219 states and 550 transitions. [2020-12-23 13:01:36,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:01:36,118 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-23 13:01:36,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:36,120 INFO L225 Difference]: With dead ends: 219 [2020-12-23 13:01:36,120 INFO L226 Difference]: Without dead ends: 216 [2020-12-23 13:01:36,120 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 [2020-12-23 13:01:36,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-12-23 13:01:36,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-12-23 13:01:36,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-23 13:01:36,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 441 transitions. [2020-12-23 13:01:36,125 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 441 transitions. Word has length 13 [2020-12-23 13:01:36,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:36,125 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 441 transitions. [2020-12-23 13:01:36,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:36,125 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 441 transitions. [2020-12-23 13:01:36,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:36,126 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:36,126 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:36,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-12-23 13:01:36,342 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:36,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:36,343 INFO L82 PathProgramCache]: Analyzing trace with hash -598716724, now seen corresponding path program 17 times [2020-12-23 13:01:36,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:36,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673018524] [2020-12-23 13:01:36,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:36,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:36,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:36,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673018524] [2020-12-23 13:01:36,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138788945] [2020-12-23 13:01:36,445 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:36,504 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 13:01:36,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:36,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:36,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:36,684 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:36,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:36,684 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:36,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278062799] [2020-12-23 13:01:36,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:36,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:36,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:36,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:36,686 INFO L87 Difference]: Start difference. First operand 166 states and 441 transitions. Second operand 17 states. [2020-12-23 13:01:36,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:36,797 INFO L93 Difference]: Finished difference Result 216 states and 542 transitions. [2020-12-23 13:01:36,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:01:36,798 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-23 13:01:36,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:36,800 INFO L225 Difference]: With dead ends: 216 [2020-12-23 13:01:36,800 INFO L226 Difference]: Without dead ends: 213 [2020-12-23 13:01:36,800 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 [2020-12-23 13:01:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-23 13:01:36,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 165. [2020-12-23 13:01:36,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 13:01:36,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 438 transitions. [2020-12-23 13:01:36,804 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 438 transitions. Word has length 13 [2020-12-23 13:01:36,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:36,804 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 438 transitions. [2020-12-23 13:01:36,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:36,804 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 438 transitions. [2020-12-23 13:01:36,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:36,804 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:36,804 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:37,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-12-23 13:01:37,005 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:37,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:37,006 INFO L82 PathProgramCache]: Analyzing trace with hash 66218396, now seen corresponding path program 18 times [2020-12-23 13:01:37,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:37,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553998898] [2020-12-23 13:01:37,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:37,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:37,113 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:37,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553998898] [2020-12-23 13:01:37,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869285510] [2020-12-23 13:01:37,114 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:37,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 13:01:37,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:37,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:37,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:37,347 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:37,347 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:37,347 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:37,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440405893] [2020-12-23 13:01:37,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:37,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:37,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:37,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:37,348 INFO L87 Difference]: Start difference. First operand 165 states and 438 transitions. Second operand 17 states. [2020-12-23 13:01:37,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:37,489 INFO L93 Difference]: Finished difference Result 214 states and 535 transitions. [2020-12-23 13:01:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:01:37,489 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-23 13:01:37,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:37,491 INFO L225 Difference]: With dead ends: 214 [2020-12-23 13:01:37,491 INFO L226 Difference]: Without dead ends: 211 [2020-12-23 13:01:37,492 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 [2020-12-23 13:01:37,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-23 13:01:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 164. [2020-12-23 13:01:37,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 13:01:37,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 435 transitions. [2020-12-23 13:01:37,495 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 435 transitions. Word has length 13 [2020-12-23 13:01:37,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:37,495 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 435 transitions. [2020-12-23 13:01:37,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:37,495 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 435 transitions. [2020-12-23 13:01:37,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:37,496 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:37,496 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:37,696 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:37,697 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:37,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:37,698 INFO L82 PathProgramCache]: Analyzing trace with hash 87667916, now seen corresponding path program 19 times [2020-12-23 13:01:37,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:37,698 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910681608] [2020-12-23 13:01:37,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:37,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:37,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910681608] [2020-12-23 13:01:37,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954354873] [2020-12-23 13:01:37,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:37,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:37,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:37,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:38,028 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:38,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:38,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:38,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001019779] [2020-12-23 13:01:38,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:38,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:38,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:38,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:38,030 INFO L87 Difference]: Start difference. First operand 164 states and 435 transitions. Second operand 17 states. [2020-12-23 13:01:38,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:38,209 INFO L93 Difference]: Finished difference Result 213 states and 535 transitions. [2020-12-23 13:01:38,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:01:38,210 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-23 13:01:38,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:38,211 INFO L225 Difference]: With dead ends: 213 [2020-12-23 13:01:38,211 INFO L226 Difference]: Without dead ends: 210 [2020-12-23 13:01:38,212 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 [2020-12-23 13:01:38,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-23 13:01:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 165. [2020-12-23 13:01:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 13:01:38,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 440 transitions. [2020-12-23 13:01:38,215 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 440 transitions. Word has length 13 [2020-12-23 13:01:38,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:38,216 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 440 transitions. [2020-12-23 13:01:38,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:38,216 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 440 transitions. [2020-12-23 13:01:38,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:38,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:38,216 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:38,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:38,429 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:38,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:38,430 INFO L82 PathProgramCache]: Analyzing trace with hash 88359836, now seen corresponding path program 20 times [2020-12-23 13:01:38,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:38,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108528414] [2020-12-23 13:01:38,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:38,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:38,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108528414] [2020-12-23 13:01:38,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407182726] [2020-12-23 13:01:38,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:38,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:38,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:38,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:38,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:38,760 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:38,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:38,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:38,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754139462] [2020-12-23 13:01:38,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:38,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:38,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:38,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:38,762 INFO L87 Difference]: Start difference. First operand 165 states and 440 transitions. Second operand 17 states. [2020-12-23 13:01:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:38,976 INFO L93 Difference]: Finished difference Result 212 states and 535 transitions. [2020-12-23 13:01:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:01:38,977 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-23 13:01:38,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:38,979 INFO L225 Difference]: With dead ends: 212 [2020-12-23 13:01:38,979 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 13:01:38,979 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 [2020-12-23 13:01:38,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 13:01:38,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 167. [2020-12-23 13:01:38,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 13:01:38,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 447 transitions. [2020-12-23 13:01:38,982 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 447 transitions. Word has length 13 [2020-12-23 13:01:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:38,983 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 447 transitions. [2020-12-23 13:01:38,983 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 447 transitions. [2020-12-23 13:01:38,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:38,983 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:38,983 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:39,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:39,184 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:39,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:39,185 INFO L82 PathProgramCache]: Analyzing trace with hash 88382156, now seen corresponding path program 21 times [2020-12-23 13:01:39,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:39,188 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239489445] [2020-12-23 13:01:39,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:39,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:39,278 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:39,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239489445] [2020-12-23 13:01:39,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989650596] [2020-12-23 13:01:39,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:39,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 13:01:39,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:39,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:39,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:39,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:39,522 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:39,522 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [73150987] [2020-12-23 13:01:39,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:39,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:39,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:39,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:39,523 INFO L87 Difference]: Start difference. First operand 167 states and 447 transitions. Second operand 17 states. [2020-12-23 13:01:39,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:39,785 INFO L93 Difference]: Finished difference Result 221 states and 559 transitions. [2020-12-23 13:01:39,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:01:39,786 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-23 13:01:39,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:39,788 INFO L225 Difference]: With dead ends: 221 [2020-12-23 13:01:39,788 INFO L226 Difference]: Without dead ends: 215 [2020-12-23 13:01:39,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:01:39,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-23 13:01:39,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-12-23 13:01:39,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 13:01:39,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 443 transitions. [2020-12-23 13:01:39,792 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 443 transitions. Word has length 13 [2020-12-23 13:01:39,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:39,792 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 443 transitions. [2020-12-23 13:01:39,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:39,792 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 443 transitions. [2020-12-23 13:01:39,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:39,793 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:39,793 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:39,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:39,994 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:39,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:39,995 INFO L82 PathProgramCache]: Analyzing trace with hash 437714495, now seen corresponding path program 69 times [2020-12-23 13:01:39,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:39,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5450159] [2020-12-23 13:01:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:40,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:40,107 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:40,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5450159] [2020-12-23 13:01:40,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005255443] [2020-12-23 13:01:40,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:40,172 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:40,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:40,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:01:40,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:40,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:40,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:40,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:40,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888711150] [2020-12-23 13:01:40,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:40,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:40,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:40,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:40,365 INFO L87 Difference]: Start difference. First operand 164 states and 443 transitions. Second operand 17 states. [2020-12-23 13:01:40,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:40,557 INFO L93 Difference]: Finished difference Result 210 states and 527 transitions. [2020-12-23 13:01:40,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:01:40,558 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:40,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:40,560 INFO L225 Difference]: With dead ends: 210 [2020-12-23 13:01:40,560 INFO L226 Difference]: Without dead ends: 208 [2020-12-23 13:01:40,560 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 [2020-12-23 13:01:40,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-23 13:01:40,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 170. [2020-12-23 13:01:40,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-23 13:01:40,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 453 transitions. [2020-12-23 13:01:40,564 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 453 transitions. Word has length 14 [2020-12-23 13:01:40,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:40,564 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 453 transitions. [2020-12-23 13:01:40,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:40,565 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 453 transitions. [2020-12-23 13:01:40,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:40,565 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:40,565 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:40,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:40,768 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:40,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:40,769 INFO L82 PathProgramCache]: Analyzing trace with hash 438082775, now seen corresponding path program 70 times [2020-12-23 13:01:40,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:40,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751366566] [2020-12-23 13:01:40,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:40,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:40,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751366566] [2020-12-23 13:01:40,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508588728] [2020-12-23 13:01:40,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:40,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:40,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:40,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:40,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:41,121 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:41,122 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:01:41,123 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:41,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:41,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:41,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:41,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574497679] [2020-12-23 13:01:41,148 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:41,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:41,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:41,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=222, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:41,148 INFO L87 Difference]: Start difference. First operand 170 states and 453 transitions. Second operand 18 states. [2020-12-23 13:01:41,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:41,722 INFO L93 Difference]: Finished difference Result 285 states and 693 transitions. [2020-12-23 13:01:41,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:41,723 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:41,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:41,725 INFO L225 Difference]: With dead ends: 285 [2020-12-23 13:01:41,725 INFO L226 Difference]: Without dead ends: 273 [2020-12-23 13:01:41,726 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 [2020-12-23 13:01:41,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-12-23 13:01:41,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 166. [2020-12-23 13:01:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-12-23 13:01:41,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 449 transitions. [2020-12-23 13:01:41,730 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 449 transitions. Word has length 14 [2020-12-23 13:01:41,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:41,731 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 449 transitions. [2020-12-23 13:01:41,731 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:41,731 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 449 transitions. [2020-12-23 13:01:41,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:41,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:41,732 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:41,932 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:41,933 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:41,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:41,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2124969700, now seen corresponding path program 71 times [2020-12-23 13:01:41,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:41,934 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963174662] [2020-12-23 13:01:41,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:42,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963174662] [2020-12-23 13:01:42,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476165544] [2020-12-23 13:01:42,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:42,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:42,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:42,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:42,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:42,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:42,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:42,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598281853] [2020-12-23 13:01:42,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:42,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:42,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:42,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:42,343 INFO L87 Difference]: Start difference. First operand 166 states and 449 transitions. Second operand 17 states. [2020-12-23 13:01:42,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:42,703 INFO L93 Difference]: Finished difference Result 241 states and 597 transitions. [2020-12-23 13:01:42,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:01:42,704 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:42,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:42,706 INFO L225 Difference]: With dead ends: 241 [2020-12-23 13:01:42,706 INFO L226 Difference]: Without dead ends: 239 [2020-12-23 13:01:42,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:01:42,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-12-23 13:01:42,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 170. [2020-12-23 13:01:42,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-23 13:01:42,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 455 transitions. [2020-12-23 13:01:42,709 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 455 transitions. Word has length 14 [2020-12-23 13:01:42,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:42,710 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 455 transitions. [2020-12-23 13:01:42,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:42,710 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 455 transitions. [2020-12-23 13:01:42,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:42,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:42,710 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:42,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:42,911 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:42,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:42,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1771052620, now seen corresponding path program 72 times [2020-12-23 13:01:42,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:42,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504567618] [2020-12-23 13:01:42,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:43,009 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:43,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504567618] [2020-12-23 13:01:43,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224656828] [2020-12-23 13:01:43,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:43,081 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:43,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:43,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:43,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:43,299 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:43,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:43,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:43,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261353685] [2020-12-23 13:01:43,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:43,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:43,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:43,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:43,300 INFO L87 Difference]: Start difference. First operand 170 states and 455 transitions. Second operand 17 states. [2020-12-23 13:01:43,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:43,755 INFO L93 Difference]: Finished difference Result 252 states and 619 transitions. [2020-12-23 13:01:43,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:01:43,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:43,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:43,758 INFO L225 Difference]: With dead ends: 252 [2020-12-23 13:01:43,758 INFO L226 Difference]: Without dead ends: 250 [2020-12-23 13:01:43,759 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:01:43,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-23 13:01:43,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 172. [2020-12-23 13:01:43,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 13:01:43,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 462 transitions. [2020-12-23 13:01:43,763 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 462 transitions. Word has length 14 [2020-12-23 13:01:43,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:43,763 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 462 transitions. [2020-12-23 13:01:43,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:43,764 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 462 transitions. [2020-12-23 13:01:43,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:43,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:43,764 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:43,968 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-12-23 13:01:43,969 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:43,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:43,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1770447190, now seen corresponding path program 73 times [2020-12-23 13:01:43,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:43,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668907564] [2020-12-23 13:01:43,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:44,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:44,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668907564] [2020-12-23 13:01:44,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [918138959] [2020-12-23 13:01:44,067 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:44,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:44,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:44,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:44,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:44,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:44,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:44,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506948219] [2020-12-23 13:01:44,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:44,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:44,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:44,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:44,368 INFO L87 Difference]: Start difference. First operand 172 states and 462 transitions. Second operand 17 states. [2020-12-23 13:01:44,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:44,911 INFO L93 Difference]: Finished difference Result 255 states and 633 transitions. [2020-12-23 13:01:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:01:44,912 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:44,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:44,914 INFO L225 Difference]: With dead ends: 255 [2020-12-23 13:01:44,914 INFO L226 Difference]: Without dead ends: 253 [2020-12-23 13:01:44,914 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=261, Invalid=551, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:01:44,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-23 13:01:44,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 174. [2020-12-23 13:01:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 13:01:44,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 469 transitions. [2020-12-23 13:01:44,919 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 469 transitions. Word has length 14 [2020-12-23 13:01:44,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:44,920 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 469 transitions. [2020-12-23 13:01:44,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:44,920 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 469 transitions. [2020-12-23 13:01:44,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:44,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:44,920 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:45,125 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:45,126 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:45,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:45,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1770427753, now seen corresponding path program 74 times [2020-12-23 13:01:45,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:45,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535648146] [2020-12-23 13:01:45,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:45,245 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:45,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535648146] [2020-12-23 13:01:45,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390146083] [2020-12-23 13:01:45,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:45,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:45,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:45,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:45,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:45,497 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:45,499 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:45,500 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:45,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:45,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:45,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:45,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606193486] [2020-12-23 13:01:45,516 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:45,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:45,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:45,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:45,516 INFO L87 Difference]: Start difference. First operand 174 states and 469 transitions. Second operand 17 states. [2020-12-23 13:01:46,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:46,237 INFO L93 Difference]: Finished difference Result 265 states and 653 transitions. [2020-12-23 13:01:46,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:46,238 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:46,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:46,239 INFO L225 Difference]: With dead ends: 265 [2020-12-23 13:01:46,239 INFO L226 Difference]: Without dead ends: 257 [2020-12-23 13:01:46,240 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 [2020-12-23 13:01:46,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-23 13:01:46,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 175. [2020-12-23 13:01:46,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 13:01:46,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 474 transitions. [2020-12-23 13:01:46,245 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 474 transitions. Word has length 14 [2020-12-23 13:01:46,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:46,245 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 474 transitions. [2020-12-23 13:01:46,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:46,245 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 474 transitions. [2020-12-23 13:01:46,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:46,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:46,246 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:46,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-12-23 13:01:46,449 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:46,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:46,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1770424870, now seen corresponding path program 75 times [2020-12-23 13:01:46,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:46,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649296054] [2020-12-23 13:01:46,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:46,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:46,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649296054] [2020-12-23 13:01:46,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227176315] [2020-12-23 13:01:46,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:46,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:46,619 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:46,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:46,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:46,830 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:01:46,833 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:01:46,835 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:46,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:46,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:46,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:46,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086456262] [2020-12-23 13:01:46,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:46,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:46,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:46,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:46,872 INFO L87 Difference]: Start difference. First operand 175 states and 474 transitions. Second operand 18 states. [2020-12-23 13:01:47,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:47,769 INFO L93 Difference]: Finished difference Result 318 states and 777 transitions. [2020-12-23 13:01:47,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:01:47,770 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:47,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:47,771 INFO L225 Difference]: With dead ends: 318 [2020-12-23 13:01:47,772 INFO L226 Difference]: Without dead ends: 306 [2020-12-23 13:01:47,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=417, Invalid=989, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:01:47,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-12-23 13:01:47,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 168. [2020-12-23 13:01:47,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-12-23 13:01:47,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 457 transitions. [2020-12-23 13:01:47,777 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 457 transitions. Word has length 14 [2020-12-23 13:01:47,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:47,777 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 457 transitions. [2020-12-23 13:01:47,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:47,777 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 457 transitions. [2020-12-23 13:01:47,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:47,778 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:47,778 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:47,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:47,983 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:47,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:47,984 INFO L82 PathProgramCache]: Analyzing trace with hash -2044516979, now seen corresponding path program 76 times [2020-12-23 13:01:47,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:47,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173101625] [2020-12-23 13:01:47,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:47,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:48,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:48,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173101625] [2020-12-23 13:01:48,100 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784941639] [2020-12-23 13:01:48,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:48,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:48,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:48,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:48,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:48,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:48,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:48,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679629783] [2020-12-23 13:01:48,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:48,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:48,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:48,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:48,395 INFO L87 Difference]: Start difference. First operand 168 states and 457 transitions. Second operand 17 states. [2020-12-23 13:01:48,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:48,856 INFO L93 Difference]: Finished difference Result 251 states and 623 transitions. [2020-12-23 13:01:48,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:48,856 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:48,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:48,857 INFO L225 Difference]: With dead ends: 251 [2020-12-23 13:01:48,857 INFO L226 Difference]: Without dead ends: 249 [2020-12-23 13:01:48,858 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:01:48,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-23 13:01:48,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 173. [2020-12-23 13:01:48,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 13:01:48,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 466 transitions. [2020-12-23 13:01:48,861 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 466 transitions. Word has length 14 [2020-12-23 13:01:48,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:48,861 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 466 transitions. [2020-12-23 13:01:48,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:48,862 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 466 transitions. [2020-12-23 13:01:48,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:48,862 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:48,862 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:49,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-12-23 13:01:49,070 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:49,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:49,071 INFO L82 PathProgramCache]: Analyzing trace with hash 336977909, now seen corresponding path program 77 times [2020-12-23 13:01:49,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:49,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96616899] [2020-12-23 13:01:49,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:49,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:49,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96616899] [2020-12-23 13:01:49,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127024412] [2020-12-23 13:01:49,176 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:49,232 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:49,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:49,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:49,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:49,453 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:49,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:49,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:49,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140978688] [2020-12-23 13:01:49,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:49,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:49,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:49,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:49,455 INFO L87 Difference]: Start difference. First operand 173 states and 466 transitions. Second operand 17 states. [2020-12-23 13:01:49,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:49,948 INFO L93 Difference]: Finished difference Result 252 states and 623 transitions. [2020-12-23 13:01:49,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:01:49,949 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:49,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:49,950 INFO L225 Difference]: With dead ends: 252 [2020-12-23 13:01:49,950 INFO L226 Difference]: Without dead ends: 250 [2020-12-23 13:01:49,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:01:49,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-23 13:01:49,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 173. [2020-12-23 13:01:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 13:01:49,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 465 transitions. [2020-12-23 13:01:49,955 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 465 transitions. Word has length 14 [2020-12-23 13:01:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:49,955 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 465 transitions. [2020-12-23 13:01:49,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 465 transitions. [2020-12-23 13:01:49,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:49,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:49,955 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:50,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-12-23 13:01:50,156 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:50,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:50,158 INFO L82 PathProgramCache]: Analyzing trace with hash 358427429, now seen corresponding path program 78 times [2020-12-23 13:01:50,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:50,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808306751] [2020-12-23 13:01:50,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:50,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:50,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:50,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808306751] [2020-12-23 13:01:50,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439557355] [2020-12-23 13:01:50,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:50,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:50,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:50,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:50,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:50,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:50,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:50,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:50,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941452942] [2020-12-23 13:01:50,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:50,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:50,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:50,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:50,579 INFO L87 Difference]: Start difference. First operand 173 states and 465 transitions. Second operand 17 states. [2020-12-23 13:01:51,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:51,191 INFO L93 Difference]: Finished difference Result 271 states and 671 transitions. [2020-12-23 13:01:51,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:01:51,192 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:51,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:51,193 INFO L225 Difference]: With dead ends: 271 [2020-12-23 13:01:51,193 INFO L226 Difference]: Without dead ends: 269 [2020-12-23 13:01:51,194 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 [2020-12-23 13:01:51,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-23 13:01:51,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 175. [2020-12-23 13:01:51,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 13:01:51,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 472 transitions. [2020-12-23 13:01:51,197 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 472 transitions. Word has length 14 [2020-12-23 13:01:51,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:51,197 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 472 transitions. [2020-12-23 13:01:51,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:51,197 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 472 transitions. [2020-12-23 13:01:51,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:51,198 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:51,198 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:51,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-12-23 13:01:51,399 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:51,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:51,399 INFO L82 PathProgramCache]: Analyzing trace with hash 359032859, now seen corresponding path program 79 times [2020-12-23 13:01:51,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:51,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954289327] [2020-12-23 13:01:51,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:51,510 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:51,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954289327] [2020-12-23 13:01:51,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215127260] [2020-12-23 13:01:51,511 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:51,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:51,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:51,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:51,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:51,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815099899] [2020-12-23 13:01:51,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:51,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:51,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:51,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:51,805 INFO L87 Difference]: Start difference. First operand 175 states and 472 transitions. Second operand 17 states. [2020-12-23 13:01:52,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:52,457 INFO L93 Difference]: Finished difference Result 269 states and 664 transitions. [2020-12-23 13:01:52,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:52,458 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:52,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:52,459 INFO L225 Difference]: With dead ends: 269 [2020-12-23 13:01:52,459 INFO L226 Difference]: Without dead ends: 267 [2020-12-23 13:01:52,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=287, Invalid=643, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:01:52,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-23 13:01:52,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 177. [2020-12-23 13:01:52,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:01:52,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 479 transitions. [2020-12-23 13:01:52,464 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 479 transitions. Word has length 14 [2020-12-23 13:01:52,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:52,464 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 479 transitions. [2020-12-23 13:01:52,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:52,464 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 479 transitions. [2020-12-23 13:01:52,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:52,465 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:52,465 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:52,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:52,666 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:52,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:52,666 INFO L82 PathProgramCache]: Analyzing trace with hash 359052296, now seen corresponding path program 80 times [2020-12-23 13:01:52,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:52,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485872697] [2020-12-23 13:01:52,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:52,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:52,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:52,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485872697] [2020-12-23 13:01:52,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620461240] [2020-12-23 13:01:52,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:52,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:52,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:52,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:52,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:53,020 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:53,022 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:53,026 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:53,043 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:53,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:53,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:53,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591039627] [2020-12-23 13:01:53,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:53,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:53,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:53,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:53,044 INFO L87 Difference]: Start difference. First operand 177 states and 479 transitions. Second operand 17 states. [2020-12-23 13:01:54,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:54,107 INFO L93 Difference]: Finished difference Result 286 states and 713 transitions. [2020-12-23 13:01:54,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:01:54,108 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:54,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:54,109 INFO L225 Difference]: With dead ends: 286 [2020-12-23 13:01:54,109 INFO L226 Difference]: Without dead ends: 278 [2020-12-23 13:01:54,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 13:01:54,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-23 13:01:54,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 178. [2020-12-23 13:01:54,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 13:01:54,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 484 transitions. [2020-12-23 13:01:54,114 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 484 transitions. Word has length 14 [2020-12-23 13:01:54,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:54,114 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 484 transitions. [2020-12-23 13:01:54,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:54,114 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 484 transitions. [2020-12-23 13:01:54,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:54,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:54,114 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:54,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-12-23 13:01:54,315 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:54,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:54,316 INFO L82 PathProgramCache]: Analyzing trace with hash 359055179, now seen corresponding path program 81 times [2020-12-23 13:01:54,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:54,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139622822] [2020-12-23 13:01:54,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:54,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:54,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:54,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139622822] [2020-12-23 13:01:54,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000496205] [2020-12-23 13:01:54,433 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:54,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:54,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:54,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:54,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:54,718 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:01:54,720 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:01:54,722 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:01:54,725 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:54,727 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:54,729 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:54,731 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:54,735 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:54,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:54,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:54,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:54,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240632662] [2020-12-23 13:01:54,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:54,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:54,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:54,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:54,790 INFO L87 Difference]: Start difference. First operand 178 states and 484 transitions. Second operand 18 states. [2020-12-23 13:01:55,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:55,954 INFO L93 Difference]: Finished difference Result 329 states and 812 transitions. [2020-12-23 13:01:55,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 13:01:55,955 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:55,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:55,956 INFO L225 Difference]: With dead ends: 329 [2020-12-23 13:01:55,956 INFO L226 Difference]: Without dead ends: 317 [2020-12-23 13:01:55,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=477, Invalid=1163, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 13:01:55,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2020-12-23 13:01:55,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 170. [2020-12-23 13:01:55,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-23 13:01:55,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 465 transitions. [2020-12-23 13:01:55,960 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 465 transitions. Word has length 14 [2020-12-23 13:01:55,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:55,960 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 465 transitions. [2020-12-23 13:01:55,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:55,960 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 465 transitions. [2020-12-23 13:01:55,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:55,961 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:55,961 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:56,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:56,162 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:56,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:56,162 INFO L82 PathProgramCache]: Analyzing trace with hash 446657436, now seen corresponding path program 82 times [2020-12-23 13:01:56,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:56,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668435427] [2020-12-23 13:01:56,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:56,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:56,283 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:56,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668435427] [2020-12-23 13:01:56,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619786037] [2020-12-23 13:01:56,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:56,347 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:56,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:56,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:56,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:56,530 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:56,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:56,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:56,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154936309] [2020-12-23 13:01:56,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:56,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:56,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:56,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:56,532 INFO L87 Difference]: Start difference. First operand 170 states and 465 transitions. Second operand 17 states. [2020-12-23 13:01:56,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:56,963 INFO L93 Difference]: Finished difference Result 244 states and 616 transitions. [2020-12-23 13:01:56,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:56,964 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:56,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:56,965 INFO L225 Difference]: With dead ends: 244 [2020-12-23 13:01:56,965 INFO L226 Difference]: Without dead ends: 242 [2020-12-23 13:01:56,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:01:56,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-12-23 13:01:56,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 171. [2020-12-23 13:01:56,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-12-23 13:01:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 468 transitions. [2020-12-23 13:01:56,970 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 468 transitions. Word has length 14 [2020-12-23 13:01:56,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:56,971 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 468 transitions. [2020-12-23 13:01:56,971 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:56,971 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 468 transitions. [2020-12-23 13:01:56,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:56,971 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:56,971 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:57,185 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-12-23 13:01:57,186 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:57,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:57,186 INFO L82 PathProgramCache]: Analyzing trace with hash 446660319, now seen corresponding path program 83 times [2020-12-23 13:01:57,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:57,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146629001] [2020-12-23 13:01:57,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:57,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:57,309 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:57,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146629001] [2020-12-23 13:01:57,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505170768] [2020-12-23 13:01:57,310 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:57,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:57,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:57,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:57,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:57,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:57,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:57,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:57,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826334603] [2020-12-23 13:01:57,569 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:57,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:57,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:57,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:57,570 INFO L87 Difference]: Start difference. First operand 171 states and 468 transitions. Second operand 17 states. [2020-12-23 13:01:58,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:58,057 INFO L93 Difference]: Finished difference Result 251 states and 630 transitions. [2020-12-23 13:01:58,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:01:58,058 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:58,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:58,059 INFO L225 Difference]: With dead ends: 251 [2020-12-23 13:01:58,059 INFO L226 Difference]: Without dead ends: 249 [2020-12-23 13:01:58,060 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:01:58,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-23 13:01:58,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 172. [2020-12-23 13:01:58,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 13:01:58,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 471 transitions. [2020-12-23 13:01:58,065 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 471 transitions. Word has length 14 [2020-12-23 13:01:58,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:58,065 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 471 transitions. [2020-12-23 13:01:58,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 471 transitions. [2020-12-23 13:01:58,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:58,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:58,066 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:58,275 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:58,276 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:58,277 INFO L82 PathProgramCache]: Analyzing trace with hash 446746809, now seen corresponding path program 84 times [2020-12-23 13:01:58,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:58,277 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845501792] [2020-12-23 13:01:58,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:58,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:58,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:58,384 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845501792] [2020-12-23 13:01:58,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835999764] [2020-12-23 13:01:58,385 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:58,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:58,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:58,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:58,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:58,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:58,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:58,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:58,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389118171] [2020-12-23 13:01:58,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:58,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:58,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:58,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:58,634 INFO L87 Difference]: Start difference. First operand 172 states and 471 transitions. Second operand 17 states. [2020-12-23 13:01:59,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:59,033 INFO L93 Difference]: Finished difference Result 251 states and 628 transitions. [2020-12-23 13:01:59,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:59,034 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:59,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:59,035 INFO L225 Difference]: With dead ends: 251 [2020-12-23 13:01:59,035 INFO L226 Difference]: Without dead ends: 249 [2020-12-23 13:01:59,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:01:59,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-23 13:01:59,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 173. [2020-12-23 13:01:59,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 13:01:59,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 474 transitions. [2020-12-23 13:01:59,040 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 474 transitions. Word has length 14 [2020-12-23 13:01:59,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:59,040 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 474 transitions. [2020-12-23 13:01:59,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:59,040 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 474 transitions. [2020-12-23 13:01:59,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:59,040 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:59,041 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:59,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:59,255 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:59,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:59,256 INFO L82 PathProgramCache]: Analyzing trace with hash 449520255, now seen corresponding path program 85 times [2020-12-23 13:01:59,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:59,256 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850294362] [2020-12-23 13:01:59,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:59,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:59,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850294362] [2020-12-23 13:01:59,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022583074] [2020-12-23 13:01:59,383 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:01:59,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:59,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:59,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:59,638 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:59,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:59,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:59,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388494966] [2020-12-23 13:01:59,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:59,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:59,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:59,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:59,640 INFO L87 Difference]: Start difference. First operand 173 states and 474 transitions. Second operand 17 states. [2020-12-23 13:01:59,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:59,987 INFO L93 Difference]: Finished difference Result 242 states and 612 transitions. [2020-12-23 13:01:59,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:01:59,988 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:59,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:59,989 INFO L225 Difference]: With dead ends: 242 [2020-12-23 13:01:59,989 INFO L226 Difference]: Without dead ends: 240 [2020-12-23 13:01:59,990 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 [2020-12-23 13:01:59,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-23 13:01:59,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 177. [2020-12-23 13:01:59,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:01:59,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 478 transitions. [2020-12-23 13:01:59,994 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 478 transitions. Word has length 14 [2020-12-23 13:01:59,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:59,994 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 478 transitions. [2020-12-23 13:01:59,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:59,994 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 478 transitions. [2020-12-23 13:01:59,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:59,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:59,994 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:00,195 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-12-23 13:02:00,195 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:00,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:00,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1258554932, now seen corresponding path program 86 times [2020-12-23 13:02:00,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:00,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634852892] [2020-12-23 13:02:00,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:00,303 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:00,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634852892] [2020-12-23 13:02:00,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37514801] [2020-12-23 13:02:00,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:00,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:00,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:00,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:00,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:00,557 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:00,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:00,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:00,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879753450] [2020-12-23 13:02:00,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:00,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:00,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:00,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:00,558 INFO L87 Difference]: Start difference. First operand 177 states and 478 transitions. Second operand 17 states. [2020-12-23 13:02:01,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:01,006 INFO L93 Difference]: Finished difference Result 264 states and 654 transitions. [2020-12-23 13:02:01,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:02:01,007 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:01,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:01,008 INFO L225 Difference]: With dead ends: 264 [2020-12-23 13:02:01,009 INFO L226 Difference]: Without dead ends: 262 [2020-12-23 13:02:01,009 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 [2020-12-23 13:02:01,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-23 13:02:01,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 177. [2020-12-23 13:02:01,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:02:01,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 478 transitions. [2020-12-23 13:02:01,014 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 478 transitions. Word has length 14 [2020-12-23 13:02:01,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:01,014 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 478 transitions. [2020-12-23 13:02:01,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:01,014 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 478 transitions. [2020-12-23 13:02:01,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:01,015 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:01,015 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:01,216 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-12-23 13:02:01,217 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:01,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:01,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1258557815, now seen corresponding path program 87 times [2020-12-23 13:02:01,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:01,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110617892] [2020-12-23 13:02:01,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:01,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:01,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110617892] [2020-12-23 13:02:01,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896709840] [2020-12-23 13:02:01,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:01,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:02:01,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:01,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:01,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:01,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:01,602 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:01,602 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:01,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622525173] [2020-12-23 13:02:01,603 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:01,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:01,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:01,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:01,604 INFO L87 Difference]: Start difference. First operand 177 states and 478 transitions. Second operand 17 states. [2020-12-23 13:02:02,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:02,067 INFO L93 Difference]: Finished difference Result 268 states and 663 transitions. [2020-12-23 13:02:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:02:02,068 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:02,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:02,069 INFO L225 Difference]: With dead ends: 268 [2020-12-23 13:02:02,069 INFO L226 Difference]: Without dead ends: 266 [2020-12-23 13:02:02,070 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 [2020-12-23 13:02:02,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-23 13:02:02,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 178. [2020-12-23 13:02:02,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 13:02:02,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 481 transitions. [2020-12-23 13:02:02,073 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 481 transitions. Word has length 14 [2020-12-23 13:02:02,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:02,073 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 481 transitions. [2020-12-23 13:02:02,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:02,073 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 481 transitions. [2020-12-23 13:02:02,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:02,074 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:02,074 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:02,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:02,275 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:02,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:02,275 INFO L82 PathProgramCache]: Analyzing trace with hash 1258644305, now seen corresponding path program 88 times [2020-12-23 13:02:02,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:02,276 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245151333] [2020-12-23 13:02:02,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:02,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:02,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:02,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245151333] [2020-12-23 13:02:02,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462346913] [2020-12-23 13:02:02,385 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:02,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:02,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:02,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:02,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:02,619 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:02,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:02,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:02,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423565449] [2020-12-23 13:02:02,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:02,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:02,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:02,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:02,620 INFO L87 Difference]: Start difference. First operand 178 states and 481 transitions. Second operand 17 states. [2020-12-23 13:02:03,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:03,035 INFO L93 Difference]: Finished difference Result 262 states and 651 transitions. [2020-12-23 13:02:03,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:02:03,036 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:03,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:03,037 INFO L225 Difference]: With dead ends: 262 [2020-12-23 13:02:03,037 INFO L226 Difference]: Without dead ends: 260 [2020-12-23 13:02:03,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:02:03,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-23 13:02:03,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 178. [2020-12-23 13:02:03,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 13:02:03,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 481 transitions. [2020-12-23 13:02:03,041 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 481 transitions. Word has length 14 [2020-12-23 13:02:03,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:03,041 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 481 transitions. [2020-12-23 13:02:03,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:03,041 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 481 transitions. [2020-12-23 13:02:03,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:03,042 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:03,042 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:03,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-12-23 13:02:03,243 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:03,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:03,243 INFO L82 PathProgramCache]: Analyzing trace with hash 1261417751, now seen corresponding path program 89 times [2020-12-23 13:02:03,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:03,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959415157] [2020-12-23 13:02:03,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:03,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:03,357 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:03,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959415157] [2020-12-23 13:02:03,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861271517] [2020-12-23 13:02:03,357 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:03,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:03,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:03,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:03,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:03,611 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:03,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:03,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:03,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649861696] [2020-12-23 13:02:03,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:03,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:03,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:03,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:03,613 INFO L87 Difference]: Start difference. First operand 178 states and 481 transitions. Second operand 17 states. [2020-12-23 13:02:03,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:03,957 INFO L93 Difference]: Finished difference Result 248 states and 621 transitions. [2020-12-23 13:02:03,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:02:03,958 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:03,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:03,959 INFO L225 Difference]: With dead ends: 248 [2020-12-23 13:02:03,959 INFO L226 Difference]: Without dead ends: 246 [2020-12-23 13:02:03,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:02:03,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-12-23 13:02:03,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 177. [2020-12-23 13:02:03,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:02:03,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 477 transitions. [2020-12-23 13:02:03,963 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 477 transitions. Word has length 14 [2020-12-23 13:02:03,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:03,963 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 477 transitions. [2020-12-23 13:02:03,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:03,963 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 477 transitions. [2020-12-23 13:02:03,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:03,964 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:03,964 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:04,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-12-23 13:02:04,165 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:04,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:04,166 INFO L82 PathProgramCache]: Analyzing trace with hash 1840373162, now seen corresponding path program 90 times [2020-12-23 13:02:04,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:04,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076413036] [2020-12-23 13:02:04,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:04,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:04,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:04,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076413036] [2020-12-23 13:02:04,263 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744936039] [2020-12-23 13:02:04,263 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:04,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:04,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:04,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:04,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:04,521 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:04,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:04,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:04,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815644768] [2020-12-23 13:02:04,522 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:04,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:04,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:04,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:04,522 INFO L87 Difference]: Start difference. First operand 177 states and 477 transitions. Second operand 17 states. [2020-12-23 13:02:05,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:05,207 INFO L93 Difference]: Finished difference Result 267 states and 657 transitions. [2020-12-23 13:02:05,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:02:05,208 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:05,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:05,209 INFO L225 Difference]: With dead ends: 267 [2020-12-23 13:02:05,209 INFO L226 Difference]: Without dead ends: 265 [2020-12-23 13:02:05,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:02:05,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-23 13:02:05,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 176. [2020-12-23 13:02:05,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-23 13:02:05,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 474 transitions. [2020-12-23 13:02:05,213 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 474 transitions. Word has length 14 [2020-12-23 13:02:05,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:05,213 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 474 transitions. [2020-12-23 13:02:05,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:05,213 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 474 transitions. [2020-12-23 13:02:05,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:05,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:05,214 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:05,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-12-23 13:02:05,414 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:05,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:05,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1840376045, now seen corresponding path program 91 times [2020-12-23 13:02:05,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:05,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915834053] [2020-12-23 13:02:05,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:05,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:05,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:05,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915834053] [2020-12-23 13:02:05,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [254208805] [2020-12-23 13:02:05,529 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:05,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:05,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:05,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:05,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:05,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093397031] [2020-12-23 13:02:05,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:05,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:05,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:05,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:05,797 INFO L87 Difference]: Start difference. First operand 176 states and 474 transitions. Second operand 17 states. [2020-12-23 13:02:06,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:06,452 INFO L93 Difference]: Finished difference Result 269 states and 659 transitions. [2020-12-23 13:02:06,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:02:06,453 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:06,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:06,454 INFO L225 Difference]: With dead ends: 269 [2020-12-23 13:02:06,454 INFO L226 Difference]: Without dead ends: 267 [2020-12-23 13:02:06,454 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 [2020-12-23 13:02:06,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-23 13:02:06,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 177. [2020-12-23 13:02:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:02:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 477 transitions. [2020-12-23 13:02:06,459 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 477 transitions. Word has length 14 [2020-12-23 13:02:06,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:06,459 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 477 transitions. [2020-12-23 13:02:06,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:06,459 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 477 transitions. [2020-12-23 13:02:06,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:06,459 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:06,459 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:06,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:06,660 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:06,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:06,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1840462535, now seen corresponding path program 92 times [2020-12-23 13:02:06,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:06,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57960403] [2020-12-23 13:02:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:06,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57960403] [2020-12-23 13:02:06,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193721853] [2020-12-23 13:02:06,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:06,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:06,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:06,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:06,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:07,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:07,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:07,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:07,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947801190] [2020-12-23 13:02:07,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:07,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:07,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:07,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:07,026 INFO L87 Difference]: Start difference. First operand 177 states and 477 transitions. Second operand 17 states. [2020-12-23 13:02:07,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:07,575 INFO L93 Difference]: Finished difference Result 262 states and 644 transitions. [2020-12-23 13:02:07,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:02:07,576 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:07,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:07,577 INFO L225 Difference]: With dead ends: 262 [2020-12-23 13:02:07,577 INFO L226 Difference]: Without dead ends: 260 [2020-12-23 13:02:07,577 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 [2020-12-23 13:02:07,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-23 13:02:07,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 176. [2020-12-23 13:02:07,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-23 13:02:07,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 474 transitions. [2020-12-23 13:02:07,580 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 474 transitions. Word has length 14 [2020-12-23 13:02:07,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:07,581 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 474 transitions. [2020-12-23 13:02:07,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:07,581 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 474 transitions. [2020-12-23 13:02:07,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:07,581 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:07,581 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:07,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-12-23 13:02:07,782 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:07,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:07,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1859141492, now seen corresponding path program 93 times [2020-12-23 13:02:07,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:07,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202776487] [2020-12-23 13:02:07,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:07,887 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:07,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202776487] [2020-12-23 13:02:07,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1309769314] [2020-12-23 13:02:07,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:07,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:07,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:07,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-23 13:02:07,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:08,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:08,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2020-12-23 13:02:08,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779988069] [2020-12-23 13:02:08,101 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:02:08,101 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:08,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:02:08,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:02:08,102 INFO L87 Difference]: Start difference. First operand 176 states and 474 transitions. Second operand 16 states. [2020-12-23 13:02:08,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:08,694 INFO L93 Difference]: Finished difference Result 268 states and 659 transitions. [2020-12-23 13:02:08,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:02:08,695 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 14 [2020-12-23 13:02:08,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:08,696 INFO L225 Difference]: With dead ends: 268 [2020-12-23 13:02:08,696 INFO L226 Difference]: Without dead ends: 266 [2020-12-23 13:02:08,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:02:08,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-23 13:02:08,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 177. [2020-12-23 13:02:08,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:02:08,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 479 transitions. [2020-12-23 13:02:08,700 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 479 transitions. Word has length 14 [2020-12-23 13:02:08,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:08,700 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 479 transitions. [2020-12-23 13:02:08,700 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:02:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 479 transitions. [2020-12-23 13:02:08,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:08,701 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:08,701 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:08,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-12-23 13:02:08,903 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:08,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:08,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1859144375, now seen corresponding path program 94 times [2020-12-23 13:02:08,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:08,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287925004] [2020-12-23 13:02:08,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:08,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:09,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:09,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287925004] [2020-12-23 13:02:09,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048984231] [2020-12-23 13:02:09,017 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:09,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:09,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:09,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:09,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:09,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:09,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:09,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15464644] [2020-12-23 13:02:09,281 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:09,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:09,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:09,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:09,282 INFO L87 Difference]: Start difference. First operand 177 states and 479 transitions. Second operand 17 states. [2020-12-23 13:02:10,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:10,056 INFO L93 Difference]: Finished difference Result 274 states and 670 transitions. [2020-12-23 13:02:10,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:02:10,057 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:10,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:10,058 INFO L225 Difference]: With dead ends: 274 [2020-12-23 13:02:10,058 INFO L226 Difference]: Without dead ends: 272 [2020-12-23 13:02:10,058 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=346, Invalid=844, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 13:02:10,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-23 13:02:10,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 178. [2020-12-23 13:02:10,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 13:02:10,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 481 transitions. [2020-12-23 13:02:10,063 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 481 transitions. Word has length 14 [2020-12-23 13:02:10,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:10,063 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 481 transitions. [2020-12-23 13:02:10,063 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:10,064 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 481 transitions. [2020-12-23 13:02:10,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:10,064 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:10,064 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:10,277 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:10,278 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:10,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:10,278 INFO L82 PathProgramCache]: Analyzing trace with hash 1859746922, now seen corresponding path program 95 times [2020-12-23 13:02:10,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:10,279 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240972949] [2020-12-23 13:02:10,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:10,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:10,392 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:10,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240972949] [2020-12-23 13:02:10,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192338326] [2020-12-23 13:02:10,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:10,458 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:10,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:10,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:10,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:10,654 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:10,655 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:10,655 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:10,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693990474] [2020-12-23 13:02:10,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:10,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:10,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:10,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:10,656 INFO L87 Difference]: Start difference. First operand 178 states and 481 transitions. Second operand 17 states. [2020-12-23 13:02:11,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:11,412 INFO L93 Difference]: Finished difference Result 265 states and 661 transitions. [2020-12-23 13:02:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:02:11,413 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:11,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:11,414 INFO L225 Difference]: With dead ends: 265 [2020-12-23 13:02:11,414 INFO L226 Difference]: Without dead ends: 263 [2020-12-23 13:02:11,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:02:11,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-23 13:02:11,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 180. [2020-12-23 13:02:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 13:02:11,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 488 transitions. [2020-12-23 13:02:11,419 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 488 transitions. Word has length 14 [2020-12-23 13:02:11,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:11,419 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 488 transitions. [2020-12-23 13:02:11,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 488 transitions. [2020-12-23 13:02:11,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:11,419 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:11,420 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:11,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:11,621 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:11,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:11,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1859766359, now seen corresponding path program 96 times [2020-12-23 13:02:11,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:11,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856648487] [2020-12-23 13:02:11,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:11,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:11,732 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:11,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856648487] [2020-12-23 13:02:11,732 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690812362] [2020-12-23 13:02:11,732 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:11,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:11,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:11,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:02:11,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:11,963 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:11,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:11,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:11,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:11,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643248814] [2020-12-23 13:02:11,976 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:11,976 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:11,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:11,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:11,977 INFO L87 Difference]: Start difference. First operand 180 states and 488 transitions. Second operand 17 states. [2020-12-23 13:02:12,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:12,704 INFO L93 Difference]: Finished difference Result 263 states and 658 transitions. [2020-12-23 13:02:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:02:12,705 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:12,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:12,705 INFO L225 Difference]: With dead ends: 263 [2020-12-23 13:02:12,706 INFO L226 Difference]: Without dead ends: 255 [2020-12-23 13:02:12,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:02:12,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-23 13:02:12,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 180. [2020-12-23 13:02:12,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 13:02:12,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 488 transitions. [2020-12-23 13:02:12,710 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 488 transitions. Word has length 14 [2020-12-23 13:02:12,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:12,710 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 488 transitions. [2020-12-23 13:02:12,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:12,710 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 488 transitions. [2020-12-23 13:02:12,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:12,710 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:12,710 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:12,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:12,911 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:12,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:12,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1859769242, now seen corresponding path program 97 times [2020-12-23 13:02:12,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:12,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162870475] [2020-12-23 13:02:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:13,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162870475] [2020-12-23 13:02:13,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231981334] [2020-12-23 13:02:13,016 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:13,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:13,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:13,259 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:02:13,261 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:02:13,262 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:13,288 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:13,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:13,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:13,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803609739] [2020-12-23 13:02:13,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:13,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:13,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:13,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:13,290 INFO L87 Difference]: Start difference. First operand 180 states and 488 transitions. Second operand 18 states. [2020-12-23 13:02:14,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:14,442 INFO L93 Difference]: Finished difference Result 332 states and 817 transitions. [2020-12-23 13:02:14,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 13:02:14,443 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:14,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:14,444 INFO L225 Difference]: With dead ends: 332 [2020-12-23 13:02:14,444 INFO L226 Difference]: Without dead ends: 320 [2020-12-23 13:02:14,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=541, Invalid=1351, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 13:02:14,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-12-23 13:02:14,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 177. [2020-12-23 13:02:14,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:02:14,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 477 transitions. [2020-12-23 13:02:14,447 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 477 transitions. Word has length 14 [2020-12-23 13:02:14,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:14,448 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 477 transitions. [2020-12-23 13:02:14,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:14,448 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 477 transitions. [2020-12-23 13:02:14,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:14,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:14,448 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:14,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:14,649 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:14,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:14,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1861912055, now seen corresponding path program 98 times [2020-12-23 13:02:14,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:14,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848704542] [2020-12-23 13:02:14,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:14,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:14,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:14,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848704542] [2020-12-23 13:02:14,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1986520638] [2020-12-23 13:02:14,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:14,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:14,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:14,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:14,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:14,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:14,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:14,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:14,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703041096] [2020-12-23 13:02:14,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:14,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:14,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:14,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:14,981 INFO L87 Difference]: Start difference. First operand 177 states and 477 transitions. Second operand 17 states. [2020-12-23 13:02:15,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:15,672 INFO L93 Difference]: Finished difference Result 271 states and 671 transitions. [2020-12-23 13:02:15,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:02:15,673 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:15,674 INFO L225 Difference]: With dead ends: 271 [2020-12-23 13:02:15,674 INFO L226 Difference]: Without dead ends: 269 [2020-12-23 13:02:15,674 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:02:15,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-23 13:02:15,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 179. [2020-12-23 13:02:15,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 13:02:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 487 transitions. [2020-12-23 13:02:15,678 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 487 transitions. Word has length 14 [2020-12-23 13:02:15,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:15,678 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 487 transitions. [2020-12-23 13:02:15,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:15,678 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 487 transitions. [2020-12-23 13:02:15,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:15,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:15,678 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:15,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-12-23 13:02:15,879 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:15,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:15,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1862517485, now seen corresponding path program 99 times [2020-12-23 13:02:15,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:15,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257549936] [2020-12-23 13:02:15,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:15,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:15,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257549936] [2020-12-23 13:02:15,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787256631] [2020-12-23 13:02:15,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:16,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:16,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:16,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:16,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:16,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:16,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:16,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:16,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166197030] [2020-12-23 13:02:16,256 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:16,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:16,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:16,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:16,256 INFO L87 Difference]: Start difference. First operand 179 states and 487 transitions. Second operand 17 states. [2020-12-23 13:02:17,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:17,048 INFO L93 Difference]: Finished difference Result 282 states and 693 transitions. [2020-12-23 13:02:17,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:02:17,049 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:17,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:17,050 INFO L225 Difference]: With dead ends: 282 [2020-12-23 13:02:17,050 INFO L226 Difference]: Without dead ends: 280 [2020-12-23 13:02:17,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=380, Invalid=880, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:02:17,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-12-23 13:02:17,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 181. [2020-12-23 13:02:17,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 13:02:17,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 494 transitions. [2020-12-23 13:02:17,054 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 494 transitions. Word has length 14 [2020-12-23 13:02:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:17,054 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 494 transitions. [2020-12-23 13:02:17,054 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:17,054 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 494 transitions. [2020-12-23 13:02:17,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:17,055 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:17,055 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:17,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-12-23 13:02:17,258 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:17,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:17,258 INFO L82 PathProgramCache]: Analyzing trace with hash 1862536922, now seen corresponding path program 100 times [2020-12-23 13:02:17,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:17,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833117413] [2020-12-23 13:02:17,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:17,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:17,370 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:17,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833117413] [2020-12-23 13:02:17,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656351529] [2020-12-23 13:02:17,371 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:17,431 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:17,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:17,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:17,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:17,600 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:17,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:17,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:17,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:17,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425033604] [2020-12-23 13:02:17,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:17,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:17,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:17,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:17,615 INFO L87 Difference]: Start difference. First operand 181 states and 494 transitions. Second operand 17 states. [2020-12-23 13:02:18,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:18,592 INFO L93 Difference]: Finished difference Result 304 states and 753 transitions. [2020-12-23 13:02:18,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 13:02:18,595 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:18,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:18,596 INFO L225 Difference]: With dead ends: 304 [2020-12-23 13:02:18,596 INFO L226 Difference]: Without dead ends: 296 [2020-12-23 13:02:18,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 545 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 13:02:18,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2020-12-23 13:02:18,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 182. [2020-12-23 13:02:18,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 13:02:18,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 499 transitions. [2020-12-23 13:02:18,601 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 499 transitions. Word has length 14 [2020-12-23 13:02:18,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:18,601 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 499 transitions. [2020-12-23 13:02:18,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:18,602 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 499 transitions. [2020-12-23 13:02:18,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:18,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:18,602 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:18,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-12-23 13:02:18,811 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:18,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:18,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1862539805, now seen corresponding path program 101 times [2020-12-23 13:02:18,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:18,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075597646] [2020-12-23 13:02:18,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:18,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:18,914 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:18,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075597646] [2020-12-23 13:02:18,915 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664191603] [2020-12-23 13:02:18,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:18,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:18,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:18,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:18,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:19,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:19,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:19,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:19,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835473890] [2020-12-23 13:02:19,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:19,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:19,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:19,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:19,164 INFO L87 Difference]: Start difference. First operand 182 states and 499 transitions. Second operand 18 states. [2020-12-23 13:02:20,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:20,199 INFO L93 Difference]: Finished difference Result 330 states and 814 transitions. [2020-12-23 13:02:20,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 13:02:20,200 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:20,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:20,201 INFO L225 Difference]: With dead ends: 330 [2020-12-23 13:02:20,201 INFO L226 Difference]: Without dead ends: 318 [2020-12-23 13:02:20,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=540, Invalid=1352, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 13:02:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-23 13:02:20,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 175. [2020-12-23 13:02:20,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 13:02:20,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 469 transitions. [2020-12-23 13:02:20,206 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 469 transitions. Word has length 14 [2020-12-23 13:02:20,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:20,206 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 469 transitions. [2020-12-23 13:02:20,206 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:20,206 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 469 transitions. [2020-12-23 13:02:20,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:20,206 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:20,207 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:20,408 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:20,409 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:20,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:20,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1926352871, now seen corresponding path program 102 times [2020-12-23 13:02:20,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:20,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360737903] [2020-12-23 13:02:20,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:20,526 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:20,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360737903] [2020-12-23 13:02:20,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147286185] [2020-12-23 13:02:20,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:20,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:20,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:20,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:02:20,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:20,775 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:20,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:20,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:20,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193121371] [2020-12-23 13:02:20,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:20,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:20,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:20,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:20,777 INFO L87 Difference]: Start difference. First operand 175 states and 469 transitions. Second operand 17 states. [2020-12-23 13:02:21,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:21,241 INFO L93 Difference]: Finished difference Result 253 states and 624 transitions. [2020-12-23 13:02:21,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:02:21,242 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:21,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:21,243 INFO L225 Difference]: With dead ends: 253 [2020-12-23 13:02:21,244 INFO L226 Difference]: Without dead ends: 251 [2020-12-23 13:02:21,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:02:21,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-23 13:02:21,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 175. [2020-12-23 13:02:21,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 13:02:21,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 468 transitions. [2020-12-23 13:02:21,248 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 468 transitions. Word has length 14 [2020-12-23 13:02:21,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:21,248 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 468 transitions. [2020-12-23 13:02:21,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:21,248 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 468 transitions. [2020-12-23 13:02:21,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:21,249 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:21,249 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:21,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-12-23 13:02:21,452 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:21,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:21,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1947802391, now seen corresponding path program 103 times [2020-12-23 13:02:21,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:21,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378794467] [2020-12-23 13:02:21,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:21,564 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:21,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378794467] [2020-12-23 13:02:21,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707381738] [2020-12-23 13:02:21,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:21,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:21,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:21,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:21,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:21,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:21,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056179075] [2020-12-23 13:02:21,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:21,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:21,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:21,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:21,805 INFO L87 Difference]: Start difference. First operand 175 states and 468 transitions. Second operand 17 states. [2020-12-23 13:02:22,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:22,384 INFO L93 Difference]: Finished difference Result 252 states and 616 transitions. [2020-12-23 13:02:22,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:02:22,385 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:22,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:22,386 INFO L225 Difference]: With dead ends: 252 [2020-12-23 13:02:22,386 INFO L226 Difference]: Without dead ends: 250 [2020-12-23 13:02:22,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=302, Invalid=754, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:02:22,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-23 13:02:22,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 175. [2020-12-23 13:02:22,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 13:02:22,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 467 transitions. [2020-12-23 13:02:22,391 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 467 transitions. Word has length 14 [2020-12-23 13:02:22,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:22,391 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 467 transitions. [2020-12-23 13:02:22,391 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:22,391 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 467 transitions. [2020-12-23 13:02:22,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:22,392 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:22,392 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:22,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:22,592 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:22,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:22,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1948494311, now seen corresponding path program 104 times [2020-12-23 13:02:22,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:22,594 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750666369] [2020-12-23 13:02:22,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:22,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:22,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:22,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750666369] [2020-12-23 13:02:22,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [266595547] [2020-12-23 13:02:22,696 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:22,759 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:22,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:22,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:22,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:22,936 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:22,937 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:22,937 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:22,937 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022472211] [2020-12-23 13:02:22,937 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:22,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:22,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:22,938 INFO L87 Difference]: Start difference. First operand 175 states and 467 transitions. Second operand 17 states. [2020-12-23 13:02:23,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:23,528 INFO L93 Difference]: Finished difference Result 247 states and 611 transitions. [2020-12-23 13:02:23,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:02:23,529 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:23,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:23,530 INFO L225 Difference]: With dead ends: 247 [2020-12-23 13:02:23,530 INFO L226 Difference]: Without dead ends: 245 [2020-12-23 13:02:23,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=310, Invalid=746, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:02:23,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-12-23 13:02:23,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 177. [2020-12-23 13:02:23,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:02:23,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 474 transitions. [2020-12-23 13:02:23,533 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 474 transitions. Word has length 14 [2020-12-23 13:02:23,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:23,534 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 474 transitions. [2020-12-23 13:02:23,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:23,534 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 474 transitions. [2020-12-23 13:02:23,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:23,534 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:23,534 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:23,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-12-23 13:02:23,735 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:23,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:23,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1948513748, now seen corresponding path program 105 times [2020-12-23 13:02:23,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:23,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550878517] [2020-12-23 13:02:23,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:23,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:23,851 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:23,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550878517] [2020-12-23 13:02:23,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [128408106] [2020-12-23 13:02:23,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:23,917 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 13:02:23,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:23,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-23 13:02:23,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:24,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:24,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:24,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741001817] [2020-12-23 13:02:24,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:24,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:24,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:24,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:24,057 INFO L87 Difference]: Start difference. First operand 177 states and 474 transitions. Second operand 17 states. [2020-12-23 13:02:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:25,195 INFO L93 Difference]: Finished difference Result 330 states and 792 transitions. [2020-12-23 13:02:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-23 13:02:25,196 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:25,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:25,197 INFO L225 Difference]: With dead ends: 330 [2020-12-23 13:02:25,197 INFO L226 Difference]: Without dead ends: 318 [2020-12-23 13:02:25,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=449, Invalid=1273, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 13:02:25,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-23 13:02:25,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 174. [2020-12-23 13:02:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 13:02:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 470 transitions. [2020-12-23 13:02:25,201 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 470 transitions. Word has length 14 [2020-12-23 13:02:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:25,201 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 470 transitions. [2020-12-23 13:02:25,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 470 transitions. [2020-12-23 13:02:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:25,201 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:25,201 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:25,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:25,402 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:25,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:25,403 INFO L82 PathProgramCache]: Analyzing trace with hash 366512909, now seen corresponding path program 106 times [2020-12-23 13:02:25,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:25,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577232830] [2020-12-23 13:02:25,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:25,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:25,524 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:25,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577232830] [2020-12-23 13:02:25,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181333373] [2020-12-23 13:02:25,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:25,590 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:25,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:25,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:25,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:25,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:25,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:25,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:25,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823820979] [2020-12-23 13:02:25,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:25,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:25,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:25,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:25,800 INFO L87 Difference]: Start difference. First operand 174 states and 470 transitions. Second operand 17 states. [2020-12-23 13:02:26,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:26,218 INFO L93 Difference]: Finished difference Result 247 states and 621 transitions. [2020-12-23 13:02:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:02:26,220 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:26,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:26,221 INFO L225 Difference]: With dead ends: 247 [2020-12-23 13:02:26,221 INFO L226 Difference]: Without dead ends: 245 [2020-12-23 13:02:26,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:02:26,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2020-12-23 13:02:26,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 181. [2020-12-23 13:02:26,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 13:02:26,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 489 transitions. [2020-12-23 13:02:26,225 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 489 transitions. Word has length 14 [2020-12-23 13:02:26,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:26,225 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 489 transitions. [2020-12-23 13:02:26,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:26,225 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 489 transitions. [2020-12-23 13:02:26,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:26,226 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:26,226 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:26,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-12-23 13:02:26,428 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:26,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:26,429 INFO L82 PathProgramCache]: Analyzing trace with hash 369286355, now seen corresponding path program 107 times [2020-12-23 13:02:26,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:26,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761903126] [2020-12-23 13:02:26,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:26,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761903126] [2020-12-23 13:02:26,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860469752] [2020-12-23 13:02:26,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:26,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:26,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:26,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:26,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:26,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:26,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:26,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:26,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667873393] [2020-12-23 13:02:26,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:26,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:26,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:26,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:26,810 INFO L87 Difference]: Start difference. First operand 181 states and 489 transitions. Second operand 17 states. [2020-12-23 13:02:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:27,187 INFO L93 Difference]: Finished difference Result 242 states and 612 transitions. [2020-12-23 13:02:27,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:02:27,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:27,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:27,188 INFO L225 Difference]: With dead ends: 242 [2020-12-23 13:02:27,189 INFO L226 Difference]: Without dead ends: 240 [2020-12-23 13:02:27,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:02:27,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-23 13:02:27,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 180. [2020-12-23 13:02:27,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 13:02:27,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 486 transitions. [2020-12-23 13:02:27,192 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 486 transitions. Word has length 14 [2020-12-23 13:02:27,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:27,192 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 486 transitions. [2020-12-23 13:02:27,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:27,192 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 486 transitions. [2020-12-23 13:02:27,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:27,193 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:27,193 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:27,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:27,394 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:27,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:27,394 INFO L82 PathProgramCache]: Analyzing trace with hash 452310989, now seen corresponding path program 108 times [2020-12-23 13:02:27,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:27,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [772110922] [2020-12-23 13:02:27,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:27,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:27,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [772110922] [2020-12-23 13:02:27,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762159923] [2020-12-23 13:02:27,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:27,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:27,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:27,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:27,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:27,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:27,780 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:27,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140867005] [2020-12-23 13:02:27,780 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:27,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:27,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:27,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:27,781 INFO L87 Difference]: Start difference. First operand 180 states and 486 transitions. Second operand 17 states. [2020-12-23 13:02:28,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:28,125 INFO L93 Difference]: Finished difference Result 239 states and 605 transitions. [2020-12-23 13:02:28,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:02:28,126 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:28,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:28,127 INFO L225 Difference]: With dead ends: 239 [2020-12-23 13:02:28,127 INFO L226 Difference]: Without dead ends: 237 [2020-12-23 13:02:28,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:02:28,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-12-23 13:02:28,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 183. [2020-12-23 13:02:28,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-23 13:02:28,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 494 transitions. [2020-12-23 13:02:28,130 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 494 transitions. Word has length 14 [2020-12-23 13:02:28,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:28,131 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 494 transitions. [2020-12-23 13:02:28,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:28,131 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 494 transitions. [2020-12-23 13:02:28,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:28,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:28,131 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:28,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-12-23 13:02:28,332 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:28,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:28,333 INFO L82 PathProgramCache]: Analyzing trace with hash 452313872, now seen corresponding path program 109 times [2020-12-23 13:02:28,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:28,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143827851] [2020-12-23 13:02:28,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:28,452 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:28,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143827851] [2020-12-23 13:02:28,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577026659] [2020-12-23 13:02:28,453 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:28,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:28,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:28,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:28,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:28,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59154802] [2020-12-23 13:02:28,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:28,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:28,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:28,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:28,745 INFO L87 Difference]: Start difference. First operand 183 states and 494 transitions. Second operand 17 states. [2020-12-23 13:02:29,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:29,116 INFO L93 Difference]: Finished difference Result 246 states and 619 transitions. [2020-12-23 13:02:29,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:02:29,117 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:29,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:29,118 INFO L225 Difference]: With dead ends: 246 [2020-12-23 13:02:29,118 INFO L226 Difference]: Without dead ends: 244 [2020-12-23 13:02:29,118 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:02:29,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-23 13:02:29,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 180. [2020-12-23 13:02:29,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 13:02:29,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 485 transitions. [2020-12-23 13:02:29,123 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 485 transitions. Word has length 14 [2020-12-23 13:02:29,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:29,123 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 485 transitions. [2020-12-23 13:02:29,123 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:29,123 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 485 transitions. [2020-12-23 13:02:29,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:29,123 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:29,124 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:29,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-12-23 13:02:29,324 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:29,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:29,325 INFO L82 PathProgramCache]: Analyzing trace with hash -234468491, now seen corresponding path program 110 times [2020-12-23 13:02:29,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:29,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035042786] [2020-12-23 13:02:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:29,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:29,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035042786] [2020-12-23 13:02:29,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890579580] [2020-12-23 13:02:29,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:29,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:29,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:29,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:29,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:29,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:29,705 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:29,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:29,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597827550] [2020-12-23 13:02:29,706 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:29,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:29,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:29,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:29,707 INFO L87 Difference]: Start difference. First operand 180 states and 485 transitions. Second operand 17 states. [2020-12-23 13:02:30,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:30,276 INFO L93 Difference]: Finished difference Result 265 states and 658 transitions. [2020-12-23 13:02:30,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:02:30,277 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:30,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:30,278 INFO L225 Difference]: With dead ends: 265 [2020-12-23 13:02:30,278 INFO L226 Difference]: Without dead ends: 263 [2020-12-23 13:02:30,278 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:02:30,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-23 13:02:30,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 184. [2020-12-23 13:02:30,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 13:02:30,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 496 transitions. [2020-12-23 13:02:30,282 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 496 transitions. Word has length 14 [2020-12-23 13:02:30,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:30,282 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 496 transitions. [2020-12-23 13:02:30,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:30,282 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 496 transitions. [2020-12-23 13:02:30,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:30,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:30,283 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:30,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-12-23 13:02:30,484 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:30,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:30,484 INFO L82 PathProgramCache]: Analyzing trace with hash -231695045, now seen corresponding path program 111 times [2020-12-23 13:02:30,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:30,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972005508] [2020-12-23 13:02:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:30,596 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:30,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972005508] [2020-12-23 13:02:30,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189849381] [2020-12-23 13:02:30,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:30,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:30,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:30,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:30,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:30,854 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:30,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:30,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:30,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178144248] [2020-12-23 13:02:30,855 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:30,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:30,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:30,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:30,856 INFO L87 Difference]: Start difference. First operand 184 states and 496 transitions. Second operand 17 states. [2020-12-23 13:02:31,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:31,334 INFO L93 Difference]: Finished difference Result 258 states and 645 transitions. [2020-12-23 13:02:31,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:02:31,335 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:31,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:31,336 INFO L225 Difference]: With dead ends: 258 [2020-12-23 13:02:31,337 INFO L226 Difference]: Without dead ends: 256 [2020-12-23 13:02:31,337 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:02:31,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-23 13:02:31,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 182. [2020-12-23 13:02:31,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 13:02:31,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 490 transitions. [2020-12-23 13:02:31,340 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 490 transitions. Word has length 14 [2020-12-23 13:02:31,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:31,341 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 490 transitions. [2020-12-23 13:02:31,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:31,341 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 490 transitions. [2020-12-23 13:02:31,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:31,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:31,341 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:31,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:31,542 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:31,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:31,543 INFO L82 PathProgramCache]: Analyzing trace with hash -148670411, now seen corresponding path program 112 times [2020-12-23 13:02:31,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:31,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283780776] [2020-12-23 13:02:31,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:31,644 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:31,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283780776] [2020-12-23 13:02:31,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135757060] [2020-12-23 13:02:31,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:31,705 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:31,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:31,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:31,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:31,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:31,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:31,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:31,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552300021] [2020-12-23 13:02:31,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:31,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:31,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:31,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:31,902 INFO L87 Difference]: Start difference. First operand 182 states and 490 transitions. Second operand 17 states. [2020-12-23 13:02:32,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:32,284 INFO L93 Difference]: Finished difference Result 262 states and 651 transitions. [2020-12-23 13:02:32,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:02:32,285 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:32,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:32,286 INFO L225 Difference]: With dead ends: 262 [2020-12-23 13:02:32,286 INFO L226 Difference]: Without dead ends: 260 [2020-12-23 13:02:32,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:02:32,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-23 13:02:32,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 185. [2020-12-23 13:02:32,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 13:02:32,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 498 transitions. [2020-12-23 13:02:32,290 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 498 transitions. Word has length 14 [2020-12-23 13:02:32,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:32,290 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 498 transitions. [2020-12-23 13:02:32,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:32,290 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 498 transitions. [2020-12-23 13:02:32,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:32,290 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:32,290 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:32,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:32,491 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:32,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:32,492 INFO L82 PathProgramCache]: Analyzing trace with hash -148667528, now seen corresponding path program 113 times [2020-12-23 13:02:32,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:32,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309409553] [2020-12-23 13:02:32,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:32,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:32,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309409553] [2020-12-23 13:02:32,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603660098] [2020-12-23 13:02:32,609 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:32,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 13:02:32,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:32,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:32,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:32,879 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:32,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:32,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:32,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082213158] [2020-12-23 13:02:32,883 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:32,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:32,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:32,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:32,883 INFO L87 Difference]: Start difference. First operand 185 states and 498 transitions. Second operand 17 states. [2020-12-23 13:02:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:33,356 INFO L93 Difference]: Finished difference Result 266 states and 658 transitions. [2020-12-23 13:02:33,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:02:33,357 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:33,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:33,358 INFO L225 Difference]: With dead ends: 266 [2020-12-23 13:02:33,358 INFO L226 Difference]: Without dead ends: 264 [2020-12-23 13:02:33,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:02:33,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-23 13:02:33,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 178. [2020-12-23 13:02:33,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 13:02:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 480 transitions. [2020-12-23 13:02:33,362 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 480 transitions. Word has length 14 [2020-12-23 13:02:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:33,362 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 480 transitions. [2020-12-23 13:02:33,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 480 transitions. [2020-12-23 13:02:33,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:33,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:33,362 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:33,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-12-23 13:02:33,563 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:33,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:33,564 INFO L82 PathProgramCache]: Analyzing trace with hash 622027455, now seen corresponding path program 114 times [2020-12-23 13:02:33,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:33,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894857272] [2020-12-23 13:02:33,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:33,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:33,680 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:33,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894857272] [2020-12-23 13:02:33,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142570614] [2020-12-23 13:02:33,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:33,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:33,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:33,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:33,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:33,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:33,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:33,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917949898] [2020-12-23 13:02:33,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:33,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:33,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:33,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:33,979 INFO L87 Difference]: Start difference. First operand 178 states and 480 transitions. Second operand 17 states. [2020-12-23 13:02:34,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:34,537 INFO L93 Difference]: Finished difference Result 267 states and 657 transitions. [2020-12-23 13:02:34,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:02:34,539 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:34,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:34,540 INFO L225 Difference]: With dead ends: 267 [2020-12-23 13:02:34,540 INFO L226 Difference]: Without dead ends: 265 [2020-12-23 13:02:34,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:02:34,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-23 13:02:34,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 179. [2020-12-23 13:02:34,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 13:02:34,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 483 transitions. [2020-12-23 13:02:34,544 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 483 transitions. Word has length 14 [2020-12-23 13:02:34,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:34,544 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 483 transitions. [2020-12-23 13:02:34,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:34,544 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 483 transitions. [2020-12-23 13:02:34,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:34,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:34,545 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:34,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-12-23 13:02:34,745 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:34,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:34,746 INFO L82 PathProgramCache]: Analyzing trace with hash 624800901, now seen corresponding path program 115 times [2020-12-23 13:02:34,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:34,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190286674] [2020-12-23 13:02:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:34,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:34,875 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:34,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190286674] [2020-12-23 13:02:34,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [137329975] [2020-12-23 13:02:34,876 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:34,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:34,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:35,153 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:35,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:35,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:35,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422978667] [2020-12-23 13:02:35,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:35,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:35,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:35,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:35,155 INFO L87 Difference]: Start difference. First operand 179 states and 483 transitions. Second operand 17 states. [2020-12-23 13:02:35,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:35,678 INFO L93 Difference]: Finished difference Result 267 states and 656 transitions. [2020-12-23 13:02:35,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:02:35,679 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:35,680 INFO L225 Difference]: With dead ends: 267 [2020-12-23 13:02:35,681 INFO L226 Difference]: Without dead ends: 265 [2020-12-23 13:02:35,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:02:35,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-23 13:02:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 178. [2020-12-23 13:02:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 13:02:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 479 transitions. [2020-12-23 13:02:35,685 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 479 transitions. Word has length 14 [2020-12-23 13:02:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:35,686 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 479 transitions. [2020-12-23 13:02:35,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 479 transitions. [2020-12-23 13:02:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:35,686 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:35,686 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:35,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:35,902 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:35,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:35,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1203845685, now seen corresponding path program 116 times [2020-12-23 13:02:35,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:35,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395719944] [2020-12-23 13:02:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:36,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395719944] [2020-12-23 13:02:36,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253964002] [2020-12-23 13:02:36,020 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:36,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:36,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:36,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:36,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:36,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:36,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:36,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:36,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235011360] [2020-12-23 13:02:36,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:36,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:36,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:36,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:36,322 INFO L87 Difference]: Start difference. First operand 178 states and 479 transitions. Second operand 17 states. [2020-12-23 13:02:37,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:37,041 INFO L93 Difference]: Finished difference Result 278 states and 678 transitions. [2020-12-23 13:02:37,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:02:37,042 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:37,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:37,043 INFO L225 Difference]: With dead ends: 278 [2020-12-23 13:02:37,043 INFO L226 Difference]: Without dead ends: 276 [2020-12-23 13:02:37,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=292, Invalid=764, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:02:37,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-12-23 13:02:37,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 178. [2020-12-23 13:02:37,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 13:02:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 481 transitions. [2020-12-23 13:02:37,047 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 481 transitions. Word has length 14 [2020-12-23 13:02:37,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:37,047 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 481 transitions. [2020-12-23 13:02:37,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:37,047 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 481 transitions. [2020-12-23 13:02:37,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:37,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:37,048 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:37,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:37,249 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:37,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:37,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1225295205, now seen corresponding path program 117 times [2020-12-23 13:02:37,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:37,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730741948] [2020-12-23 13:02:37,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:37,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:37,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730741948] [2020-12-23 13:02:37,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643952641] [2020-12-23 13:02:37,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:37,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:37,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:37,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:37,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:37,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:37,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:37,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:37,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774859787] [2020-12-23 13:02:37,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:37,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:37,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:37,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:37,662 INFO L87 Difference]: Start difference. First operand 178 states and 481 transitions. Second operand 17 states. [2020-12-23 13:02:38,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:38,636 INFO L93 Difference]: Finished difference Result 286 states and 691 transitions. [2020-12-23 13:02:38,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:02:38,638 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:38,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:38,639 INFO L225 Difference]: With dead ends: 286 [2020-12-23 13:02:38,639 INFO L226 Difference]: Without dead ends: 284 [2020-12-23 13:02:38,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:02:38,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-12-23 13:02:38,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 179. [2020-12-23 13:02:38,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 13:02:38,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 486 transitions. [2020-12-23 13:02:38,642 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 486 transitions. Word has length 14 [2020-12-23 13:02:38,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:38,643 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 486 transitions. [2020-12-23 13:02:38,643 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:38,643 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 486 transitions. [2020-12-23 13:02:38,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:38,643 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:38,643 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:38,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:38,844 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:38,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:38,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1225900635, now seen corresponding path program 118 times [2020-12-23 13:02:38,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:38,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450391543] [2020-12-23 13:02:38,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:38,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:38,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:38,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450391543] [2020-12-23 13:02:38,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626578681] [2020-12-23 13:02:38,959 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:39,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:39,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:39,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:39,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:39,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:39,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:39,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:39,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341507807] [2020-12-23 13:02:39,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:39,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:39,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:39,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:39,255 INFO L87 Difference]: Start difference. First operand 179 states and 486 transitions. Second operand 17 states. [2020-12-23 13:02:40,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:40,216 INFO L93 Difference]: Finished difference Result 301 states and 729 transitions. [2020-12-23 13:02:40,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:02:40,217 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:40,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:40,218 INFO L225 Difference]: With dead ends: 301 [2020-12-23 13:02:40,218 INFO L226 Difference]: Without dead ends: 299 [2020-12-23 13:02:40,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=381, Invalid=879, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:02:40,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-12-23 13:02:40,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 181. [2020-12-23 13:02:40,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 13:02:40,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 493 transitions. [2020-12-23 13:02:40,223 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 493 transitions. Word has length 14 [2020-12-23 13:02:40,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:40,223 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 493 transitions. [2020-12-23 13:02:40,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:40,223 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 493 transitions. [2020-12-23 13:02:40,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:40,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:40,224 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:40,424 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-12-23 13:02:40,424 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:40,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:40,425 INFO L82 PathProgramCache]: Analyzing trace with hash 1225920072, now seen corresponding path program 119 times [2020-12-23 13:02:40,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:40,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264987170] [2020-12-23 13:02:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:40,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:40,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264987170] [2020-12-23 13:02:40,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217898040] [2020-12-23 13:02:40,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:40,606 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:40,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:40,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:40,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:40,792 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:40,794 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:02:40,795 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:40,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:40,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:40,811 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997044731] [2020-12-23 13:02:40,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:40,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:40,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:40,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:40,812 INFO L87 Difference]: Start difference. First operand 181 states and 493 transitions. Second operand 17 states. [2020-12-23 13:02:42,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:42,024 INFO L93 Difference]: Finished difference Result 333 states and 816 transitions. [2020-12-23 13:02:42,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 13:02:42,025 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:42,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:42,026 INFO L225 Difference]: With dead ends: 333 [2020-12-23 13:02:42,026 INFO L226 Difference]: Without dead ends: 325 [2020-12-23 13:02:42,026 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-12-23 13:02:42,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-12-23 13:02:42,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 185. [2020-12-23 13:02:42,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 13:02:42,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 513 transitions. [2020-12-23 13:02:42,030 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 513 transitions. Word has length 14 [2020-12-23 13:02:42,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:42,030 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 513 transitions. [2020-12-23 13:02:42,031 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:42,031 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 513 transitions. [2020-12-23 13:02:42,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:42,031 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:42,031 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:42,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-12-23 13:02:42,232 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:42,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:42,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1225922955, now seen corresponding path program 120 times [2020-12-23 13:02:42,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:42,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786049636] [2020-12-23 13:02:42,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:42,357 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:42,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786049636] [2020-12-23 13:02:42,358 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223092520] [2020-12-23 13:02:42,358 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:42,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:42,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:42,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:42,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:42,666 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:02:42,667 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:02:42,669 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:42,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:42,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:42,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:42,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378206147] [2020-12-23 13:02:42,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:42,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:42,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:42,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:42,713 INFO L87 Difference]: Start difference. First operand 185 states and 513 transitions. Second operand 18 states. [2020-12-23 13:02:44,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:44,106 INFO L93 Difference]: Finished difference Result 369 states and 900 transitions. [2020-12-23 13:02:44,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-23 13:02:44,108 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:44,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:44,109 INFO L225 Difference]: With dead ends: 369 [2020-12-23 13:02:44,109 INFO L226 Difference]: Without dead ends: 357 [2020-12-23 13:02:44,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=571, Invalid=1409, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 13:02:44,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-12-23 13:02:44,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 178. [2020-12-23 13:02:44,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 13:02:44,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 477 transitions. [2020-12-23 13:02:44,115 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 477 transitions. Word has length 14 [2020-12-23 13:02:44,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:44,116 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 477 transitions. [2020-12-23 13:02:44,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:44,116 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 477 transitions. [2020-12-23 13:02:44,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:44,116 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:44,116 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:44,331 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-12-23 13:02:44,332 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:44,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:44,333 INFO L82 PathProgramCache]: Analyzing trace with hash 1289736021, now seen corresponding path program 121 times [2020-12-23 13:02:44,333 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:44,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550902881] [2020-12-23 13:02:44,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:44,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:44,455 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:44,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550902881] [2020-12-23 13:02:44,456 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [324508415] [2020-12-23 13:02:44,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:44,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:44,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:44,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:44,716 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:44,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:44,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:44,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076236495] [2020-12-23 13:02:44,717 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:44,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:44,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:44,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:44,718 INFO L87 Difference]: Start difference. First operand 178 states and 477 transitions. Second operand 17 states. [2020-12-23 13:02:45,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:45,441 INFO L93 Difference]: Finished difference Result 278 states and 670 transitions. [2020-12-23 13:02:45,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:02:45,442 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:45,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:45,443 INFO L225 Difference]: With dead ends: 278 [2020-12-23 13:02:45,444 INFO L226 Difference]: Without dead ends: 276 [2020-12-23 13:02:45,444 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:02:45,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-12-23 13:02:45,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 178. [2020-12-23 13:02:45,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 13:02:45,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 476 transitions. [2020-12-23 13:02:45,448 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 476 transitions. Word has length 14 [2020-12-23 13:02:45,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:45,448 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 476 transitions. [2020-12-23 13:02:45,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:45,448 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 476 transitions. [2020-12-23 13:02:45,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:45,448 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:45,449 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:45,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-12-23 13:02:45,650 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:45,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:45,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1311185541, now seen corresponding path program 122 times [2020-12-23 13:02:45,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:45,651 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457847839] [2020-12-23 13:02:45,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:45,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:45,767 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:45,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457847839] [2020-12-23 13:02:45,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640648194] [2020-12-23 13:02:45,768 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:45,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:45,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:45,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:45,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:46,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:46,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:46,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:46,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385977788] [2020-12-23 13:02:46,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:46,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:46,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:46,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:46,029 INFO L87 Difference]: Start difference. First operand 178 states and 476 transitions. Second operand 17 states. [2020-12-23 13:02:46,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:46,834 INFO L93 Difference]: Finished difference Result 287 states and 690 transitions. [2020-12-23 13:02:46,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:02:46,835 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:46,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:46,836 INFO L225 Difference]: With dead ends: 287 [2020-12-23 13:02:46,836 INFO L226 Difference]: Without dead ends: 285 [2020-12-23 13:02:46,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=377, Invalid=883, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:02:46,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-12-23 13:02:46,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 180. [2020-12-23 13:02:46,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 13:02:46,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 483 transitions. [2020-12-23 13:02:46,840 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 483 transitions. Word has length 14 [2020-12-23 13:02:46,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:46,840 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 483 transitions. [2020-12-23 13:02:46,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:46,840 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 483 transitions. [2020-12-23 13:02:46,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:46,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:46,841 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:47,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-12-23 13:02:47,042 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:47,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:47,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1311877461, now seen corresponding path program 123 times [2020-12-23 13:02:47,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:47,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782032324] [2020-12-23 13:02:47,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:47,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:47,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782032324] [2020-12-23 13:02:47,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048680270] [2020-12-23 13:02:47,164 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:47,228 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:47,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:47,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:47,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:47,424 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:47,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:47,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:47,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445259336] [2020-12-23 13:02:47,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:47,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:47,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:47,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:47,426 INFO L87 Difference]: Start difference. First operand 180 states and 483 transitions. Second operand 17 states. [2020-12-23 13:02:48,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:48,225 INFO L93 Difference]: Finished difference Result 283 states and 690 transitions. [2020-12-23 13:02:48,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:02:48,226 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:48,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:48,228 INFO L225 Difference]: With dead ends: 283 [2020-12-23 13:02:48,228 INFO L226 Difference]: Without dead ends: 281 [2020-12-23 13:02:48,228 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=393, Invalid=867, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:02:48,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-12-23 13:02:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 182. [2020-12-23 13:02:48,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 13:02:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 490 transitions. [2020-12-23 13:02:48,233 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 490 transitions. Word has length 14 [2020-12-23 13:02:48,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:48,233 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 490 transitions. [2020-12-23 13:02:48,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:48,233 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 490 transitions. [2020-12-23 13:02:48,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:48,234 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:48,234 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:48,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-12-23 13:02:48,448 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:48,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:48,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1311896898, now seen corresponding path program 124 times [2020-12-23 13:02:48,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:48,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150180072] [2020-12-23 13:02:48,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:48,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:48,575 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:48,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150180072] [2020-12-23 13:02:48,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071979273] [2020-12-23 13:02:48,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:48,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:48,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:48,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:48,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:48,831 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:48,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:48,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:48,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086701074] [2020-12-23 13:02:48,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:48,863 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:48,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:48,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:48,864 INFO L87 Difference]: Start difference. First operand 182 states and 490 transitions. Second operand 18 states. [2020-12-23 13:02:50,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:50,052 INFO L93 Difference]: Finished difference Result 351 states and 843 transitions. [2020-12-23 13:02:50,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-23 13:02:50,054 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:50,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:50,055 INFO L225 Difference]: With dead ends: 351 [2020-12-23 13:02:50,055 INFO L226 Difference]: Without dead ends: 339 [2020-12-23 13:02:50,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=541, Invalid=1351, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 13:02:50,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2020-12-23 13:02:50,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 174. [2020-12-23 13:02:50,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 13:02:50,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 458 transitions. [2020-12-23 13:02:50,059 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 458 transitions. Word has length 14 [2020-12-23 13:02:50,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:50,059 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 458 transitions. [2020-12-23 13:02:50,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 458 transitions. [2020-12-23 13:02:50,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:50,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:50,060 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:50,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:50,262 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:50,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:50,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1010518171, now seen corresponding path program 125 times [2020-12-23 13:02:50,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:50,263 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35910450] [2020-12-23 13:02:50,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:50,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:50,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35910450] [2020-12-23 13:02:50,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329455607] [2020-12-23 13:02:50,381 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:50,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:50,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:50,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:50,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:50,654 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:50,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:50,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:50,655 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3153494] [2020-12-23 13:02:50,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:50,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:50,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:50,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:50,656 INFO L87 Difference]: Start difference. First operand 174 states and 458 transitions. Second operand 17 states. [2020-12-23 13:02:51,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:51,109 INFO L93 Difference]: Finished difference Result 264 states and 642 transitions. [2020-12-23 13:02:51,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:02:51,110 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:51,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:51,111 INFO L225 Difference]: With dead ends: 264 [2020-12-23 13:02:51,111 INFO L226 Difference]: Without dead ends: 262 [2020-12-23 13:02:51,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:02:51,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-23 13:02:51,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 177. [2020-12-23 13:02:51,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:02:51,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 466 transitions. [2020-12-23 13:02:51,115 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 466 transitions. Word has length 14 [2020-12-23 13:02:51,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:51,115 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 466 transitions. [2020-12-23 13:02:51,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:51,115 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 466 transitions. [2020-12-23 13:02:51,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:51,115 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:51,116 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:51,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-12-23 13:02:51,316 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:51,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:51,317 INFO L82 PathProgramCache]: Analyzing trace with hash -1010425915, now seen corresponding path program 126 times [2020-12-23 13:02:51,317 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:51,318 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507040674] [2020-12-23 13:02:51,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:51,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:51,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507040674] [2020-12-23 13:02:51,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105202434] [2020-12-23 13:02:51,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:51,493 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:51,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:51,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:51,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:51,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:51,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:51,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500916471] [2020-12-23 13:02:51,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:51,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:51,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:51,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:51,731 INFO L87 Difference]: Start difference. First operand 177 states and 466 transitions. Second operand 17 states. [2020-12-23 13:02:52,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:52,236 INFO L93 Difference]: Finished difference Result 259 states and 631 transitions. [2020-12-23 13:02:52,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:02:52,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:52,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:52,238 INFO L225 Difference]: With dead ends: 259 [2020-12-23 13:02:52,238 INFO L226 Difference]: Without dead ends: 257 [2020-12-23 13:02:52,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:02:52,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-23 13:02:52,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 176. [2020-12-23 13:02:52,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-23 13:02:52,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 463 transitions. [2020-12-23 13:02:52,242 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 463 transitions. Word has length 14 [2020-12-23 13:02:52,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:52,242 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 463 transitions. [2020-12-23 13:02:52,243 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:52,243 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 463 transitions. [2020-12-23 13:02:52,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:52,243 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:52,243 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:52,443 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:52,444 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:52,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:52,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1007744725, now seen corresponding path program 127 times [2020-12-23 13:02:52,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:52,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487985409] [2020-12-23 13:02:52,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:52,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:52,565 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:52,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487985409] [2020-12-23 13:02:52,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908631292] [2020-12-23 13:02:52,566 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:52,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:52,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:52,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:52,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:52,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:52,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:52,866 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030173188] [2020-12-23 13:02:52,866 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:52,866 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:52,867 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:52,867 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:52,867 INFO L87 Difference]: Start difference. First operand 176 states and 463 transitions. Second operand 17 states. [2020-12-23 13:02:53,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:53,284 INFO L93 Difference]: Finished difference Result 253 states and 618 transitions. [2020-12-23 13:02:53,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:02:53,285 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:53,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:53,286 INFO L225 Difference]: With dead ends: 253 [2020-12-23 13:02:53,286 INFO L226 Difference]: Without dead ends: 251 [2020-12-23 13:02:53,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:02:53,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-23 13:02:53,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 172. [2020-12-23 13:02:53,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 13:02:53,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 453 transitions. [2020-12-23 13:02:53,291 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 453 transitions. Word has length 14 [2020-12-23 13:02:53,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:53,291 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 453 transitions. [2020-12-23 13:02:53,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:53,291 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 453 transitions. [2020-12-23 13:02:53,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:53,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:53,291 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:53,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:53,492 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:53,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:53,493 INFO L82 PathProgramCache]: Analyzing trace with hash -428699941, now seen corresponding path program 128 times [2020-12-23 13:02:53,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:53,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998798931] [2020-12-23 13:02:53,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:53,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:53,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:53,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998798931] [2020-12-23 13:02:53,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067969823] [2020-12-23 13:02:53,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:53,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:53,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:53,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:53,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:53,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:53,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:53,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:53,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304994235] [2020-12-23 13:02:53,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:53,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:53,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:53,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:53,929 INFO L87 Difference]: Start difference. First operand 172 states and 453 transitions. Second operand 17 states. [2020-12-23 13:02:54,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:54,425 INFO L93 Difference]: Finished difference Result 261 states and 626 transitions. [2020-12-23 13:02:54,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:02:54,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:54,427 INFO L225 Difference]: With dead ends: 261 [2020-12-23 13:02:54,427 INFO L226 Difference]: Without dead ends: 259 [2020-12-23 13:02:54,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:02:54,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-23 13:02:54,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 172. [2020-12-23 13:02:54,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 13:02:54,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 453 transitions. [2020-12-23 13:02:54,431 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 453 transitions. Word has length 14 [2020-12-23 13:02:54,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:54,431 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 453 transitions. [2020-12-23 13:02:54,431 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:54,431 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 453 transitions. [2020-12-23 13:02:54,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:54,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:54,432 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:54,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:54,632 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:54,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:54,633 INFO L82 PathProgramCache]: Analyzing trace with hash -428607685, now seen corresponding path program 129 times [2020-12-23 13:02:54,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:54,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3897424] [2020-12-23 13:02:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:54,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:54,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3897424] [2020-12-23 13:02:54,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985629950] [2020-12-23 13:02:54,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:54,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:54,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:54,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:54,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:55,101 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:55,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:55,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:55,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398057149] [2020-12-23 13:02:55,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:55,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:55,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:55,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:55,103 INFO L87 Difference]: Start difference. First operand 172 states and 453 transitions. Second operand 17 states. [2020-12-23 13:02:55,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:55,662 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-12-23 13:02:55,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:02:55,663 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:55,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:55,664 INFO L225 Difference]: With dead ends: 262 [2020-12-23 13:02:55,664 INFO L226 Difference]: Without dead ends: 260 [2020-12-23 13:02:55,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:02:55,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-23 13:02:55,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 172. [2020-12-23 13:02:55,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 13:02:55,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 452 transitions. [2020-12-23 13:02:55,668 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 452 transitions. Word has length 14 [2020-12-23 13:02:55,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:55,668 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 452 transitions. [2020-12-23 13:02:55,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:55,669 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 452 transitions. [2020-12-23 13:02:55,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:55,669 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:55,669 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:55,869 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:55,870 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:55,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:55,871 INFO L82 PathProgramCache]: Analyzing trace with hash -409931611, now seen corresponding path program 130 times [2020-12-23 13:02:55,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:55,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146649824] [2020-12-23 13:02:55,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:55,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:55,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:55,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146649824] [2020-12-23 13:02:55,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191271665] [2020-12-23 13:02:55,997 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:56,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:56,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:56,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:56,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:56,293 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:56,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:56,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486225226] [2020-12-23 13:02:56,294 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:56,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:56,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:56,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:56,295 INFO L87 Difference]: Start difference. First operand 172 states and 452 transitions. Second operand 17 states. [2020-12-23 13:02:56,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:56,951 INFO L93 Difference]: Finished difference Result 272 states and 651 transitions. [2020-12-23 13:02:56,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:02:56,952 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:56,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:56,953 INFO L225 Difference]: With dead ends: 272 [2020-12-23 13:02:56,953 INFO L226 Difference]: Without dead ends: 270 [2020-12-23 13:02:56,953 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=282, Invalid=710, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:02:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-12-23 13:02:56,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 174. [2020-12-23 13:02:56,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 13:02:56,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 462 transitions. [2020-12-23 13:02:56,957 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 462 transitions. Word has length 14 [2020-12-23 13:02:56,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:56,957 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 462 transitions. [2020-12-23 13:02:56,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 462 transitions. [2020-12-23 13:02:56,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:56,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:56,958 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:57,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-12-23 13:02:57,159 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:57,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:57,159 INFO L82 PathProgramCache]: Analyzing trace with hash -409326181, now seen corresponding path program 131 times [2020-12-23 13:02:57,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:57,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080090911] [2020-12-23 13:02:57,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:57,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:57,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080090911] [2020-12-23 13:02:57,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718634260] [2020-12-23 13:02:57,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:57,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:57,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:57,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:57,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:57,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:57,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:57,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:57,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194025323] [2020-12-23 13:02:57,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:57,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:57,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:57,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:57,577 INFO L87 Difference]: Start difference. First operand 174 states and 462 transitions. Second operand 17 states. [2020-12-23 13:02:58,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:58,327 INFO L93 Difference]: Finished difference Result 273 states and 666 transitions. [2020-12-23 13:02:58,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:02:58,328 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:58,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:58,329 INFO L225 Difference]: With dead ends: 273 [2020-12-23 13:02:58,330 INFO L226 Difference]: Without dead ends: 271 [2020-12-23 13:02:58,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=314, Invalid=742, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:02:58,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-12-23 13:02:58,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 177. [2020-12-23 13:02:58,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:02:58,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 474 transitions. [2020-12-23 13:02:58,335 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 474 transitions. Word has length 14 [2020-12-23 13:02:58,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:58,335 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 474 transitions. [2020-12-23 13:02:58,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:58,335 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 474 transitions. [2020-12-23 13:02:58,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:58,336 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:58,336 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:58,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-12-23 13:02:58,551 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:58,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:58,552 INFO L82 PathProgramCache]: Analyzing trace with hash -409303861, now seen corresponding path program 132 times [2020-12-23 13:02:58,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:58,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583849159] [2020-12-23 13:02:58,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:58,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:58,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583849159] [2020-12-23 13:02:58,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125983796] [2020-12-23 13:02:58,681 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:02:58,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:58,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:58,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:58,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:58,951 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:02:58,953 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:02:58,955 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:58,956 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:58,958 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:02:58,960 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:02:59,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:59,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:59,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:59,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020999298] [2020-12-23 13:02:59,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:59,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:59,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:59,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:59,054 INFO L87 Difference]: Start difference. First operand 177 states and 474 transitions. Second operand 18 states. [2020-12-23 13:03:07,435 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 46 [2020-12-23 13:03:21,950 WARN L197 SmtUtils]: Spent 4.06 s on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-12-23 13:03:32,263 WARN L197 SmtUtils]: Spent 2.03 s on a formula simplification that was a NOOP. DAG size: 46 [2020-12-23 13:04:07,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:07,050 INFO L93 Difference]: Finished difference Result 376 states and 908 transitions. [2020-12-23 13:04:07,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 13:04:07,051 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:04:07,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:07,053 INFO L225 Difference]: With dead ends: 376 [2020-12-23 13:04:07,053 INFO L226 Difference]: Without dead ends: 367 [2020-12-23 13:04:07,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 31.6s TimeCoverageRelationStatistics Valid=499, Invalid=1296, Unknown=11, NotChecked=0, Total=1806 [2020-12-23 13:04:07,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2020-12-23 13:04:07,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 175. [2020-12-23 13:04:07,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 13:04:07,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 463 transitions. [2020-12-23 13:04:07,058 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 463 transitions. Word has length 14 [2020-12-23 13:04:07,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:07,059 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 463 transitions. [2020-12-23 13:04:07,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:04:07,059 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 463 transitions. [2020-12-23 13:04:07,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:04:07,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:07,059 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:07,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-12-23 13:04:07,260 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:07,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:07,261 INFO L82 PathProgramCache]: Analyzing trace with hash -407158165, now seen corresponding path program 133 times [2020-12-23 13:04:07,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:07,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725555931] [2020-12-23 13:04:07,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:07,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:07,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:07,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725555931] [2020-12-23 13:04:07,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471698624] [2020-12-23 13:04:07,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:04:07,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:07,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:04:07,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:07,771 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:07,771 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:04:07,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743003193] [2020-12-23 13:04:07,772 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:04:07,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:07,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:04:07,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:04:07,773 INFO L87 Difference]: Start difference. First operand 175 states and 463 transitions. Second operand 17 states. [2020-12-23 13:04:08,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:08,669 INFO L93 Difference]: Finished difference Result 274 states and 662 transitions. [2020-12-23 13:04:08,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:04:08,671 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:04:08,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:08,671 INFO L225 Difference]: With dead ends: 274 [2020-12-23 13:04:08,671 INFO L226 Difference]: Without dead ends: 272 [2020-12-23 13:04:08,672 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:04:08,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-12-23 13:04:08,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 177. [2020-12-23 13:04:08,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:04:08,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 470 transitions. [2020-12-23 13:04:08,676 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 470 transitions. Word has length 14 [2020-12-23 13:04:08,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:08,677 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 470 transitions. [2020-12-23 13:04:08,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:04:08,677 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 470 transitions. [2020-12-23 13:04:08,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:04:08,677 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:08,677 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:08,879 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-12-23 13:04:08,880 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:08,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:08,881 INFO L82 PathProgramCache]: Analyzing trace with hash -406466245, now seen corresponding path program 134 times [2020-12-23 13:04:08,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:08,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002998837] [2020-12-23 13:04:08,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:08,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:09,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002998837] [2020-12-23 13:04:09,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567336422] [2020-12-23 13:04:09,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:04:09,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:04:09,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:09,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:04:09,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:09,385 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:09,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:09,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:04:09,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94722800] [2020-12-23 13:04:09,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:04:09,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:09,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:04:09,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:04:09,387 INFO L87 Difference]: Start difference. First operand 177 states and 470 transitions. Second operand 17 states. [2020-12-23 13:04:10,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:10,242 INFO L93 Difference]: Finished difference Result 276 states and 676 transitions. [2020-12-23 13:04:10,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:04:10,243 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:04:10,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:10,244 INFO L225 Difference]: With dead ends: 276 [2020-12-23 13:04:10,244 INFO L226 Difference]: Without dead ends: 274 [2020-12-23 13:04:10,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=301, Invalid=629, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:04:10,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-12-23 13:04:10,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 179. [2020-12-23 13:04:10,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 13:04:10,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 477 transitions. [2020-12-23 13:04:10,251 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 477 transitions. Word has length 14 [2020-12-23 13:04:10,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:10,251 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 477 transitions. [2020-12-23 13:04:10,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:04:10,251 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 477 transitions. [2020-12-23 13:04:10,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:04:10,254 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:10,256 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:10,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:10,457 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:10,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:10,458 INFO L82 PathProgramCache]: Analyzing trace with hash -406446808, now seen corresponding path program 135 times [2020-12-23 13:04:10,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:10,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812942990] [2020-12-23 13:04:10,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:10,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:10,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:10,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812942990] [2020-12-23 13:04:10,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771313416] [2020-12-23 13:04:10,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:04:10,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:04:10,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:10,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:04:10,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:10,980 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:04:10,983 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:04:10,984 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:04:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:11,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:11,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:04:11,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214465689] [2020-12-23 13:04:11,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:04:11,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:11,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:04:11,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:04:11,035 INFO L87 Difference]: Start difference. First operand 179 states and 477 transitions. Second operand 18 states. [2020-12-23 13:04:12,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:12,607 INFO L93 Difference]: Finished difference Result 344 states and 838 transitions. [2020-12-23 13:04:12,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:04:12,608 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:04:12,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:12,610 INFO L225 Difference]: With dead ends: 344 [2020-12-23 13:04:12,610 INFO L226 Difference]: Without dead ends: 332 [2020-12-23 13:04:12,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=459, Invalid=1101, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 13:04:12,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2020-12-23 13:04:12,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 174. [2020-12-23 13:04:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 13:04:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 461 transitions. [2020-12-23 13:04:12,617 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 461 transitions. Word has length 14 [2020-12-23 13:04:12,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:12,617 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 461 transitions. [2020-12-23 13:04:12,617 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:04:12,617 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 461 transitions. [2020-12-23 13:04:12,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:04:12,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:12,618 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:12,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-12-23 13:04:12,820 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:12,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:12,820 INFO L82 PathProgramCache]: Analyzing trace with hash -342809605, now seen corresponding path program 136 times [2020-12-23 13:04:12,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:12,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202368858] [2020-12-23 13:04:12,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:12,967 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:12,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202368858] [2020-12-23 13:04:12,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596827256] [2020-12-23 13:04:12,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:04:13,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:04:13,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:13,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:04:13,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:13,337 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:13,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:13,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:04:13,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131505864] [2020-12-23 13:04:13,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:04:13,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:13,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:04:13,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:04:13,339 INFO L87 Difference]: Start difference. First operand 174 states and 461 transitions. Second operand 17 states. [2020-12-23 13:04:14,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:14,013 INFO L93 Difference]: Finished difference Result 254 states and 622 transitions. [2020-12-23 13:04:14,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:04:14,014 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:04:14,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:14,015 INFO L225 Difference]: With dead ends: 254 [2020-12-23 13:04:14,015 INFO L226 Difference]: Without dead ends: 252 [2020-12-23 13:04:14,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:04:14,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-23 13:04:14,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 172. [2020-12-23 13:04:14,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 13:04:14,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 456 transitions. [2020-12-23 13:04:14,021 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 456 transitions. Word has length 14 [2020-12-23 13:04:14,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:14,021 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 456 transitions. [2020-12-23 13:04:14,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:04:14,021 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 456 transitions. [2020-12-23 13:04:14,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:04:14,022 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:14,022 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:14,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:14,223 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:14,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:14,223 INFO L82 PathProgramCache]: Analyzing trace with hash -324041275, now seen corresponding path program 137 times [2020-12-23 13:04:14,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:14,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571513502] [2020-12-23 13:04:14,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:14,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:14,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:14,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571513502] [2020-12-23 13:04:14,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703980621] [2020-12-23 13:04:14,364 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:04:14,429 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:04:14,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:14,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:04:14,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:14,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:14,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:04:14,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191993670] [2020-12-23 13:04:14,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:04:14,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:14,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:04:14,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:04:14,752 INFO L87 Difference]: Start difference. First operand 172 states and 456 transitions. Second operand 17 states. [2020-12-23 13:04:15,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:15,421 INFO L93 Difference]: Finished difference Result 261 states and 636 transitions. [2020-12-23 13:04:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:04:15,423 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:04:15,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:15,423 INFO L225 Difference]: With dead ends: 261 [2020-12-23 13:04:15,424 INFO L226 Difference]: Without dead ends: 259 [2020-12-23 13:04:15,424 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 [2020-12-23 13:04:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-12-23 13:04:15,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 174. [2020-12-23 13:04:15,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 13:04:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 463 transitions. [2020-12-23 13:04:15,429 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 463 transitions. Word has length 14 [2020-12-23 13:04:15,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:15,429 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 463 transitions. [2020-12-23 13:04:15,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:04:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 463 transitions. [2020-12-23 13:04:15,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:04:15,430 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:15,430 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:15,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:15,633 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:15,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:15,634 INFO L82 PathProgramCache]: Analyzing trace with hash -323349355, now seen corresponding path program 138 times [2020-12-23 13:04:15,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:15,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550520335] [2020-12-23 13:04:15,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:15,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:15,784 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:15,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550520335] [2020-12-23 13:04:15,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222790618] [2020-12-23 13:04:15,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:04:15,848 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:04:15,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:15,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:04:15,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:16,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:16,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:04:16,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306878396] [2020-12-23 13:04:16,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:04:16,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:16,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:04:16,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:04:16,178 INFO L87 Difference]: Start difference. First operand 174 states and 463 transitions. Second operand 17 states. [2020-12-23 13:04:16,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:16,993 INFO L93 Difference]: Finished difference Result 269 states and 659 transitions. [2020-12-23 13:04:16,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:04:16,995 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:04:16,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:16,996 INFO L225 Difference]: With dead ends: 269 [2020-12-23 13:04:16,996 INFO L226 Difference]: Without dead ends: 267 [2020-12-23 13:04:16,996 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 [2020-12-23 13:04:16,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-23 13:04:17,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 176. [2020-12-23 13:04:17,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-23 13:04:17,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 470 transitions. [2020-12-23 13:04:17,002 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 470 transitions. Word has length 14 [2020-12-23 13:04:17,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:17,002 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 470 transitions. [2020-12-23 13:04:17,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:04:17,002 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 470 transitions. [2020-12-23 13:04:17,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:04:17,003 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:17,003 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:17,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:17,206 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:17,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:17,207 INFO L82 PathProgramCache]: Analyzing trace with hash -323329918, now seen corresponding path program 139 times [2020-12-23 13:04:17,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:17,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961027107] [2020-12-23 13:04:17,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:17,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:17,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:17,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961027107] [2020-12-23 13:04:17,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755703210] [2020-12-23 13:04:17,366 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-12-23 13:04:17,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:17,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:04:17,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:17,714 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:04:17,716 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:04:17,717 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:04:17,766 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:17,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:17,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:04:17,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927721207] [2020-12-23 13:04:17,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:04:17,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:17,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:04:17,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:04:17,768 INFO L87 Difference]: Start difference. First operand 176 states and 470 transitions. Second operand 18 states. [2020-12-23 13:04:18,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:18,969 INFO L93 Difference]: Finished difference Result 342 states and 838 transitions. [2020-12-23 13:04:18,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:04:18,970 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:04:18,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:18,971 INFO L225 Difference]: With dead ends: 342 [2020-12-23 13:04:18,971 INFO L226 Difference]: Without dead ends: 330 [2020-12-23 13:04:18,972 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=417, Invalid=989, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:04:18,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2020-12-23 13:04:18,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 172. [2020-12-23 13:04:18,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 13:04:18,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 456 transitions. [2020-12-23 13:04:18,975 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 456 transitions. Word has length 14 [2020-12-23 13:04:18,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:18,975 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 456 transitions. [2020-12-23 13:04:18,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:04:18,975 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 456 transitions. [2020-12-23 13:04:18,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:04:18,976 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:18,976 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:19,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2020-12-23 13:04:19,177 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:19,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:19,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1017682108, now seen corresponding path program 22 times [2020-12-23 13:04:19,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:19,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3708957] [2020-12-23 13:04:19,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:19,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:19,419 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:19,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3708957] [2020-12-23 13:04:19,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997493016] [2020-12-23 13:04:19,420 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:19,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:04:19,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:19,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:19,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:19,992 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:19,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:19,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-23 13:04:19,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110329545] [2020-12-23 13:04:19,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 13:04:19,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:19,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 13:04:19,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:04:19,994 INFO L87 Difference]: Start difference. First operand 172 states and 456 transitions. Second operand 19 states. [2020-12-23 13:04:20,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:20,086 INFO L93 Difference]: Finished difference Result 225 states and 569 transitions. [2020-12-23 13:04:20,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:04:20,088 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-12-23 13:04:20,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:20,089 INFO L225 Difference]: With dead ends: 225 [2020-12-23 13:04:20,089 INFO L226 Difference]: Without dead ends: 222 [2020-12-23 13:04:20,089 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:04:20,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-23 13:04:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 182. [2020-12-23 13:04:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 13:04:20,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 479 transitions. [2020-12-23 13:04:20,094 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 479 transitions. Word has length 14 [2020-12-23 13:04:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:20,095 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 479 transitions. [2020-12-23 13:04:20,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 13:04:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 479 transitions. [2020-12-23 13:04:20,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:04:20,095 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:20,096 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:20,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:20,306 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:20,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:20,306 INFO L82 PathProgramCache]: Analyzing trace with hash -432872108, now seen corresponding path program 23 times [2020-12-23 13:04:20,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:20,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [997609140] [2020-12-23 13:04:20,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:20,530 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:20,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [997609140] [2020-12-23 13:04:20,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025156322] [2020-12-23 13:04:20,531 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:20,594 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 13:04:20,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:20,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:20,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:20,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:20,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-23 13:04:20,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113575817] [2020-12-23 13:04:20,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 13:04:20,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:20,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 13:04:20,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:04:20,930 INFO L87 Difference]: Start difference. First operand 182 states and 479 transitions. Second operand 19 states. [2020-12-23 13:04:21,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:21,073 INFO L93 Difference]: Finished difference Result 244 states and 605 transitions. [2020-12-23 13:04:21,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:04:21,075 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-12-23 13:04:21,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:21,075 INFO L225 Difference]: With dead ends: 244 [2020-12-23 13:04:21,076 INFO L226 Difference]: Without dead ends: 241 [2020-12-23 13:04:21,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:21,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-23 13:04:21,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 181. [2020-12-23 13:04:21,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 13:04:21,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 476 transitions. [2020-12-23 13:04:21,082 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 476 transitions. Word has length 14 [2020-12-23 13:04:21,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:21,082 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 476 transitions. [2020-12-23 13:04:21,082 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 13:04:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 476 transitions. [2020-12-23 13:04:21,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:04:21,083 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:21,084 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:21,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-12-23 13:04:21,298 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:21,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:21,299 INFO L82 PathProgramCache]: Analyzing trace with hash -1380348892, now seen corresponding path program 24 times [2020-12-23 13:04:21,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:21,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847149923] [2020-12-23 13:04:21,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:21,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:21,497 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:21,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847149923] [2020-12-23 13:04:21,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696534226] [2020-12-23 13:04:21,498 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:21,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 13:04:21,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:21,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:21,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:21,889 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:21,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:21,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-23 13:04:21,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361841876] [2020-12-23 13:04:21,890 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 13:04:21,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:21,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 13:04:21,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:04:21,891 INFO L87 Difference]: Start difference. First operand 181 states and 476 transitions. Second operand 19 states. [2020-12-23 13:04:22,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:22,072 INFO L93 Difference]: Finished difference Result 241 states and 597 transitions. [2020-12-23 13:04:22,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:04:22,074 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-12-23 13:04:22,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:22,075 INFO L225 Difference]: With dead ends: 241 [2020-12-23 13:04:22,075 INFO L226 Difference]: Without dead ends: 238 [2020-12-23 13:04:22,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=301, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:04:22,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-12-23 13:04:22,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 180. [2020-12-23 13:04:22,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 13:04:22,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 473 transitions. [2020-12-23 13:04:22,080 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 473 transitions. Word has length 14 [2020-12-23 13:04:22,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:22,080 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 473 transitions. [2020-12-23 13:04:22,081 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 13:04:22,081 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 473 transitions. [2020-12-23 13:04:22,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:04:22,081 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:22,082 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:22,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:22,296 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:22,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2052770644, now seen corresponding path program 25 times [2020-12-23 13:04:22,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:22,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954993187] [2020-12-23 13:04:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:22,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:22,486 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:22,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954993187] [2020-12-23 13:04:22,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144370594] [2020-12-23 13:04:22,487 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:22,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:22,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:22,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:22,867 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:22,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:22,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-23 13:04:22,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415937967] [2020-12-23 13:04:22,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 13:04:22,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:22,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 13:04:22,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:04:22,870 INFO L87 Difference]: Start difference. First operand 180 states and 473 transitions. Second operand 19 states. [2020-12-23 13:04:23,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:23,090 INFO L93 Difference]: Finished difference Result 238 states and 589 transitions. [2020-12-23 13:04:23,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:04:23,091 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-12-23 13:04:23,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:23,092 INFO L225 Difference]: With dead ends: 238 [2020-12-23 13:04:23,092 INFO L226 Difference]: Without dead ends: 235 [2020-12-23 13:04:23,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:04:23,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-12-23 13:04:23,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 179. [2020-12-23 13:04:23,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 13:04:23,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 470 transitions. [2020-12-23 13:04:23,096 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 470 transitions. Word has length 14 [2020-12-23 13:04:23,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:23,096 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 470 transitions. [2020-12-23 13:04:23,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 13:04:23,096 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 470 transitions. [2020-12-23 13:04:23,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:04:23,097 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:23,097 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:23,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-12-23 13:04:23,298 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:23,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:23,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1577261532, now seen corresponding path program 26 times [2020-12-23 13:04:23,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:23,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332149093] [2020-12-23 13:04:23,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:23,488 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:23,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332149093] [2020-12-23 13:04:23,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147652875] [2020-12-23 13:04:23,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:23,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:04:23,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:23,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:23,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:23,861 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:23,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:23,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-23 13:04:23,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797558895] [2020-12-23 13:04:23,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 13:04:23,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:23,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 13:04:23,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=264, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:04:23,863 INFO L87 Difference]: Start difference. First operand 179 states and 470 transitions. Second operand 19 states. [2020-12-23 13:04:24,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:24,107 INFO L93 Difference]: Finished difference Result 237 states and 589 transitions. [2020-12-23 13:04:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:04:24,108 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-12-23 13:04:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:24,109 INFO L225 Difference]: With dead ends: 237 [2020-12-23 13:04:24,109 INFO L226 Difference]: Without dead ends: 234 [2020-12-23 13:04:24,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:04:24,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-12-23 13:04:24,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 180. [2020-12-23 13:04:24,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 13:04:24,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 475 transitions. [2020-12-23 13:04:24,113 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 475 transitions. Word has length 14 [2020-12-23 13:04:24,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:24,114 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 475 transitions. [2020-12-23 13:04:24,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 13:04:24,114 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 475 transitions. [2020-12-23 13:04:24,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:04:24,114 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:24,114 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:24,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-12-23 13:04:24,315 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:24,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1555812012, now seen corresponding path program 27 times [2020-12-23 13:04:24,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:24,317 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740634515] [2020-12-23 13:04:24,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:24,494 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:24,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740634515] [2020-12-23 13:04:24,495 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609588253] [2020-12-23 13:04:24,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:24,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 13:04:24,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:24,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 13:04:24,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:24,893 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:24,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:24,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-23 13:04:24,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515246256] [2020-12-23 13:04:24,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 13:04:24,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:24,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 13:04:24,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:04:24,895 INFO L87 Difference]: Start difference. First operand 180 states and 475 transitions. Second operand 19 states. [2020-12-23 13:04:25,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:25,223 INFO L93 Difference]: Finished difference Result 236 states and 589 transitions. [2020-12-23 13:04:25,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:04:25,225 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-12-23 13:04:25,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:25,226 INFO L225 Difference]: With dead ends: 236 [2020-12-23 13:04:25,226 INFO L226 Difference]: Without dead ends: 233 [2020-12-23 13:04:25,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:04:25,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-23 13:04:25,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 182. [2020-12-23 13:04:25,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 13:04:25,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 482 transitions. [2020-12-23 13:04:25,230 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 482 transitions. Word has length 14 [2020-12-23 13:04:25,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:25,230 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 482 transitions. [2020-12-23 13:04:25,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 13:04:25,230 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 482 transitions. [2020-12-23 13:04:25,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:04:25,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:25,231 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:25,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:25,432 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:25,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:25,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1555120092, now seen corresponding path program 28 times [2020-12-23 13:04:25,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:25,433 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230104429] [2020-12-23 13:04:25,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:25,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:25,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230104429] [2020-12-23 13:04:25,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187263273] [2020-12-23 13:04:25,603 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:25,663 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:04:25,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:25,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:25,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:26,005 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:26,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:26,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-23 13:04:26,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489841126] [2020-12-23 13:04:26,007 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 13:04:26,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:26,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 13:04:26,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=252, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:04:26,008 INFO L87 Difference]: Start difference. First operand 182 states and 482 transitions. Second operand 19 states. [2020-12-23 13:04:26,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:26,388 INFO L93 Difference]: Finished difference Result 235 states and 589 transitions. [2020-12-23 13:04:26,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:04:26,389 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 14 [2020-12-23 13:04:26,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:26,390 INFO L225 Difference]: With dead ends: 235 [2020-12-23 13:04:26,390 INFO L226 Difference]: Without dead ends: 232 [2020-12-23 13:04:26,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:04:26,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-23 13:04:26,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 184. [2020-12-23 13:04:26,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 13:04:26,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 489 transitions. [2020-12-23 13:04:26,396 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 489 transitions. Word has length 14 [2020-12-23 13:04:26,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:26,396 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 489 transitions. [2020-12-23 13:04:26,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 13:04:26,396 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 489 transitions. [2020-12-23 13:04:26,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:04:26,397 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:26,397 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:26,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:26,606 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:26,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:26,606 INFO L82 PathProgramCache]: Analyzing trace with hash -1555097772, now seen corresponding path program 29 times [2020-12-23 13:04:26,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:26,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903392607] [2020-12-23 13:04:26,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:26,816 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:26,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903392607] [2020-12-23 13:04:26,817 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213263185] [2020-12-23 13:04:26,817 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:26,878 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 13:04:26,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:26,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:26,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:27,257 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:27,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:27,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:27,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829430975] [2020-12-23 13:04:27,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:27,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:27,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:27,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:27,259 INFO L87 Difference]: Start difference. First operand 184 states and 489 transitions. Second operand 20 states. [2020-12-23 13:04:27,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:27,851 INFO L93 Difference]: Finished difference Result 260 states and 651 transitions. [2020-12-23 13:04:27,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:04:27,852 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 14 [2020-12-23 13:04:27,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:27,853 INFO L225 Difference]: With dead ends: 260 [2020-12-23 13:04:27,853 INFO L226 Difference]: Without dead ends: 248 [2020-12-23 13:04:27,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:04:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-23 13:04:27,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 186. [2020-12-23 13:04:27,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 13:04:27,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 500 transitions. [2020-12-23 13:04:27,856 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 500 transitions. Word has length 14 [2020-12-23 13:04:27,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:27,856 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 500 transitions. [2020-12-23 13:04:27,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:27,856 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 500 transitions. [2020-12-23 13:04:27,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:27,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:27,856 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:28,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-12-23 13:04:28,057 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:28,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:28,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1759455308, now seen corresponding path program 5 times [2020-12-23 13:04:28,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:28,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114931983] [2020-12-23 13:04:28,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:28,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:28,277 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:28,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114931983] [2020-12-23 13:04:28,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704455844] [2020-12-23 13:04:28,278 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:28,342 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 13:04:28,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:28,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:04:28,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:28,691 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:04:28,740 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:28,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:28,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 20 [2020-12-23 13:04:28,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367379240] [2020-12-23 13:04:28,741 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-23 13:04:28,741 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:28,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-23 13:04:28,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=340, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:04:28,742 INFO L87 Difference]: Start difference. First operand 186 states and 500 transitions. Second operand 22 states. [2020-12-23 13:04:29,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:29,249 INFO L93 Difference]: Finished difference Result 275 states and 692 transitions. [2020-12-23 13:04:29,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:04:29,251 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 15 [2020-12-23 13:04:29,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:29,251 INFO L225 Difference]: With dead ends: 275 [2020-12-23 13:04:29,251 INFO L226 Difference]: Without dead ends: 267 [2020-12-23 13:04:29,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=319, Invalid=737, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:04:29,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-23 13:04:29,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 199. [2020-12-23 13:04:29,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-12-23 13:04:29,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 547 transitions. [2020-12-23 13:04:29,255 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 547 transitions. Word has length 15 [2020-12-23 13:04:29,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:29,255 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 547 transitions. [2020-12-23 13:04:29,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-23 13:04:29,255 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 547 transitions. [2020-12-23 13:04:29,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:29,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:29,256 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:29,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:29,459 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:29,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:29,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1032767072, now seen corresponding path program 140 times [2020-12-23 13:04:29,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:29,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532854537] [2020-12-23 13:04:29,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:29,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:29,647 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:29,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532854537] [2020-12-23 13:04:29,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444817863] [2020-12-23 13:04:29,648 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:29,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:04:29,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:29,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:29,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:30,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:30,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:30,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054902350] [2020-12-23 13:04:30,069 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:30,069 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:30,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:30,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:30,070 INFO L87 Difference]: Start difference. First operand 199 states and 547 transitions. Second operand 20 states. [2020-12-23 13:04:30,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:30,425 INFO L93 Difference]: Finished difference Result 250 states and 643 transitions. [2020-12-23 13:04:30,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:04:30,427 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:30,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:30,428 INFO L225 Difference]: With dead ends: 250 [2020-12-23 13:04:30,428 INFO L226 Difference]: Without dead ends: 248 [2020-12-23 13:04:30,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:04:30,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-23 13:04:30,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 207. [2020-12-23 13:04:30,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-12-23 13:04:30,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 563 transitions. [2020-12-23 13:04:30,432 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 563 transitions. Word has length 15 [2020-12-23 13:04:30,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:30,432 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 563 transitions. [2020-12-23 13:04:30,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:30,432 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 563 transitions. [2020-12-23 13:04:30,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:30,432 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:30,432 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:30,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:30,634 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:30,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:30,634 INFO L82 PathProgramCache]: Analyzing trace with hash 1033135352, now seen corresponding path program 141 times [2020-12-23 13:04:30,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:30,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983364738] [2020-12-23 13:04:30,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:30,813 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:30,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983364738] [2020-12-23 13:04:30,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990634248] [2020-12-23 13:04:30,814 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:30,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 13:04:30,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:30,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:30,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:31,187 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:04:31,188 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:04:31,189 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:04:31,226 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:31,227 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:31,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:31,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014107236] [2020-12-23 13:04:31,228 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:31,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:31,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:31,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:31,228 INFO L87 Difference]: Start difference. First operand 207 states and 563 transitions. Second operand 20 states. [2020-12-23 13:04:32,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:32,205 INFO L93 Difference]: Finished difference Result 340 states and 852 transitions. [2020-12-23 13:04:32,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:04:32,207 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:32,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:32,208 INFO L225 Difference]: With dead ends: 340 [2020-12-23 13:04:32,208 INFO L226 Difference]: Without dead ends: 328 [2020-12-23 13:04:32,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=375, Invalid=885, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:04:32,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-12-23 13:04:32,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 202. [2020-12-23 13:04:32,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-12-23 13:04:32,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 556 transitions. [2020-12-23 13:04:32,213 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 556 transitions. Word has length 15 [2020-12-23 13:04:32,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:32,213 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 556 transitions. [2020-12-23 13:04:32,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:32,213 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 556 transitions. [2020-12-23 13:04:32,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:32,214 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:32,214 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:32,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:32,415 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:32,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:32,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1529917123, now seen corresponding path program 142 times [2020-12-23 13:04:32,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:32,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178125953] [2020-12-23 13:04:32,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:32,627 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:32,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178125953] [2020-12-23 13:04:32,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059596383] [2020-12-23 13:04:32,628 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:32,691 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:04:32,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:32,692 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:32,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:33,112 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:33,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:33,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:33,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311301876] [2020-12-23 13:04:33,113 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:33,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:33,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:33,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:33,115 INFO L87 Difference]: Start difference. First operand 202 states and 556 transitions. Second operand 20 states. [2020-12-23 13:04:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:33,849 INFO L93 Difference]: Finished difference Result 290 states and 730 transitions. [2020-12-23 13:04:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:04:33,850 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:33,851 INFO L225 Difference]: With dead ends: 290 [2020-12-23 13:04:33,851 INFO L226 Difference]: Without dead ends: 288 [2020-12-23 13:04:33,852 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:04:33,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-12-23 13:04:33,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 206. [2020-12-23 13:04:33,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-23 13:04:33,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 562 transitions. [2020-12-23 13:04:33,855 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 562 transitions. Word has length 15 [2020-12-23 13:04:33,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:33,855 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 562 transitions. [2020-12-23 13:04:33,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:33,855 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 562 transitions. [2020-12-23 13:04:33,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:33,856 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:33,856 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:34,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable176 [2020-12-23 13:04:34,057 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:34,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:34,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1176000043, now seen corresponding path program 143 times [2020-12-23 13:04:34,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:34,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387304212] [2020-12-23 13:04:34,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:34,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:34,243 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:34,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387304212] [2020-12-23 13:04:34,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2066594797] [2020-12-23 13:04:34,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:34,307 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:04:34,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:34,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:34,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:34,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:34,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:34,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:34,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123816969] [2020-12-23 13:04:34,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:34,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:34,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:34,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:34,717 INFO L87 Difference]: Start difference. First operand 206 states and 562 transitions. Second operand 20 states. [2020-12-23 13:04:35,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:35,551 INFO L93 Difference]: Finished difference Result 307 states and 767 transitions. [2020-12-23 13:04:35,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:04:35,552 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:35,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:35,553 INFO L225 Difference]: With dead ends: 307 [2020-12-23 13:04:35,553 INFO L226 Difference]: Without dead ends: 305 [2020-12-23 13:04:35,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:04:35,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-12-23 13:04:35,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 208. [2020-12-23 13:04:35,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-12-23 13:04:35,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 569 transitions. [2020-12-23 13:04:35,558 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 569 transitions. Word has length 15 [2020-12-23 13:04:35,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:35,558 INFO L481 AbstractCegarLoop]: Abstraction has 208 states and 569 transitions. [2020-12-23 13:04:35,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:35,558 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 569 transitions. [2020-12-23 13:04:35,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:35,558 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:35,559 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:35,774 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:35,775 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:35,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:35,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1175394613, now seen corresponding path program 144 times [2020-12-23 13:04:35,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:35,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391193063] [2020-12-23 13:04:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:35,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:35,963 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:35,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391193063] [2020-12-23 13:04:35,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824454551] [2020-12-23 13:04:35,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:36,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:04:36,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:36,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:36,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:36,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:36,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:36,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526553192] [2020-12-23 13:04:36,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:36,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:36,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:36,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:36,419 INFO L87 Difference]: Start difference. First operand 208 states and 569 transitions. Second operand 20 states. [2020-12-23 13:04:37,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:37,364 INFO L93 Difference]: Finished difference Result 310 states and 787 transitions. [2020-12-23 13:04:37,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:04:37,365 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:37,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:37,366 INFO L225 Difference]: With dead ends: 310 [2020-12-23 13:04:37,366 INFO L226 Difference]: Without dead ends: 308 [2020-12-23 13:04:37,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:04:37,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-12-23 13:04:37,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 210. [2020-12-23 13:04:37,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-12-23 13:04:37,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 576 transitions. [2020-12-23 13:04:37,371 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 576 transitions. Word has length 15 [2020-12-23 13:04:37,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:37,371 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 576 transitions. [2020-12-23 13:04:37,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:37,371 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 576 transitions. [2020-12-23 13:04:37,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:37,372 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:37,372 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:37,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-12-23 13:04:37,573 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:37,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:37,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1175375176, now seen corresponding path program 145 times [2020-12-23 13:04:37,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:37,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337915306] [2020-12-23 13:04:37,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:37,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:37,776 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:37,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337915306] [2020-12-23 13:04:37,776 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007992444] [2020-12-23 13:04:37,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:37,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:37,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:38,143 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:04:38,144 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:04:38,145 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:04:38,192 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:38,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:38,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:38,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997426613] [2020-12-23 13:04:38,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:38,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:38,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:38,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=263, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:38,193 INFO L87 Difference]: Start difference. First operand 210 states and 576 transitions. Second operand 20 states. [2020-12-23 13:04:39,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:39,505 INFO L93 Difference]: Finished difference Result 369 states and 926 transitions. [2020-12-23 13:04:39,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:04:39,506 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:39,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:39,507 INFO L225 Difference]: With dead ends: 369 [2020-12-23 13:04:39,507 INFO L226 Difference]: Without dead ends: 357 [2020-12-23 13:04:39,508 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=540, Invalid=1182, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 13:04:39,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-12-23 13:04:39,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 206. [2020-12-23 13:04:39,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-12-23 13:04:39,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 572 transitions. [2020-12-23 13:04:39,512 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 572 transitions. Word has length 15 [2020-12-23 13:04:39,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:39,512 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 572 transitions. [2020-12-23 13:04:39,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:39,513 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 572 transitions. [2020-12-23 13:04:39,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:39,513 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:39,513 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:39,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 174 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-12-23 13:04:39,728 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:39,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:39,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1449464402, now seen corresponding path program 146 times [2020-12-23 13:04:39,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:39,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899389881] [2020-12-23 13:04:39,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:39,927 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:39,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899389881] [2020-12-23 13:04:39,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063344160] [2020-12-23 13:04:39,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:39,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:04:39,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:39,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:39,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:40,472 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:40,473 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:40,473 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:40,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013570090] [2020-12-23 13:04:40,473 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:40,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:40,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:40,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:40,474 INFO L87 Difference]: Start difference. First operand 206 states and 572 transitions. Second operand 20 states. [2020-12-23 13:04:45,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:45,127 INFO L93 Difference]: Finished difference Result 320 states and 802 transitions. [2020-12-23 13:04:45,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:04:45,129 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:45,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:45,130 INFO L225 Difference]: With dead ends: 320 [2020-12-23 13:04:45,130 INFO L226 Difference]: Without dead ends: 316 [2020-12-23 13:04:45,130 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:04:45,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-12-23 13:04:45,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 211. [2020-12-23 13:04:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-12-23 13:04:45,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 581 transitions. [2020-12-23 13:04:45,134 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 581 transitions. Word has length 15 [2020-12-23 13:04:45,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:45,134 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 581 transitions. [2020-12-23 13:04:45,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:45,134 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 581 transitions. [2020-12-23 13:04:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:45,134 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:45,135 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:45,335 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:45,335 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:45,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:45,336 INFO L82 PathProgramCache]: Analyzing trace with hash 932030486, now seen corresponding path program 147 times [2020-12-23 13:04:45,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:45,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014716169] [2020-12-23 13:04:45,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:45,522 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:45,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014716169] [2020-12-23 13:04:45,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1928184605] [2020-12-23 13:04:45,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:45,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:04:45,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:45,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:45,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:46,152 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:04:46,153 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:46,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:46,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636466977] [2020-12-23 13:04:46,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:46,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:46,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:46,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:46,154 INFO L87 Difference]: Start difference. First operand 211 states and 581 transitions. Second operand 20 states.