/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_longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-bitabs-dcfa08f [2020-12-23 13:00:21,724 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-23 13:00:21,727 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-23 13:00:21,770 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-23 13:00:21,770 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-23 13:00:21,774 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-23 13:00:21,777 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-23 13:00:21,783 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-23 13:00:21,786 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-23 13:00:21,793 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-23 13:00:21,797 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-23 13:00:21,799 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-23 13:00:21,799 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-23 13:00:21,802 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-23 13:00:21,804 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-23 13:00:21,806 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-23 13:00:21,807 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-23 13:00:21,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-23 13:00:21,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-23 13:00:21,824 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-23 13:00:21,826 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-23 13:00:21,828 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-23 13:00:21,829 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-23 13:00:21,832 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-23 13:00:21,837 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-23 13:00:21,838 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-23 13:00:21,838 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-23 13:00:21,840 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-23 13:00:21,841 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-23 13:00:21,842 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-23 13:00:21,842 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-23 13:00:21,843 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-23 13:00:21,844 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-23 13:00:21,845 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-23 13:00:21,846 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-23 13:00:21,859 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-23 13:00:21,860 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-23 13:00:21,862 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-23 13:00:21,862 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-23 13:00:21,863 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-23 13:00:21,864 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-23 13:00:21,866 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 13:00:21,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-23 13:00:21,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-23 13:00:21,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-23 13:00:21,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-23 13:00:21,923 INFO L138 SettingsManager]: * Use SBE=true [2020-12-23 13:00:21,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-23 13:00:21,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-23 13:00:21,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-23 13:00:21,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-23 13:00:21,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-23 13:00:21,925 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-23 13:00:21,926 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-23 13:00:21,926 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-23 13:00:21,926 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-23 13:00:21,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-23 13:00:21,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-23 13:00:21,927 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-23 13:00:21,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-23 13:00:21,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-23 13:00:21,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-23 13:00:21,928 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-23 13:00:21,928 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-23 13:00:21,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-23 13:00:21,928 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-23 13:00:21,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-23 13:00:21,929 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-23 13:00:22,344 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-23 13:00:22,376 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-23 13:00:22,379 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-23 13:00:22,380 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-23 13:00:22,381 INFO L275 PluginConnector]: CDTParser initialized [2020-12-23 13:00:22,382 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/fib_bench_longer-2.i [2020-12-23 13:00:22,471 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4f52ff169/cbb219c9f8284f00ad43e4d760da45a0/FLAGe63c97004 [2020-12-23 13:00:23,210 INFO L306 CDTParser]: Found 1 translation units. [2020-12-23 13:00:23,211 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-bitabs/releaseScripts/default/sv-benchmarks/c/pthread/fib_bench_longer-2.i [2020-12-23 13:00:23,247 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4f52ff169/cbb219c9f8284f00ad43e4d760da45a0/FLAGe63c97004 [2020-12-23 13:00:23,446 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/data/4f52ff169/cbb219c9f8284f00ad43e4d760da45a0 [2020-12-23 13:00:23,450 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-23 13:00:23,453 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-23 13:00:23,458 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-23 13:00:23,458 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-23 13:00:23,462 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-23 13:00:23,464 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:00:23" (1/1) ... [2020-12-23 13:00:23,467 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@63c731ba and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:23, skipping insertion in model container [2020-12-23 13:00:23,467 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.12 01:00:23" (1/1) ... [2020-12-23 13:00:23,477 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-23 13:00:23,543 INFO L178 MainTranslator]: Built tables and reachable declarations left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~1,] [2020-12-23 13:00:24,061 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_longer-2.i[30929,30942] [2020-12-23 13:00:24,067 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 13:00:24,075 INFO L203 MainTranslator]: Completed pre-run left hand side expression in assignment: lhs: VariableLHS[~k~0,] left hand side expression in assignment: lhs: VariableLHS[~k~1,] [2020-12-23 13:00:24,148 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_longer-2.i[30929,30942] [2020-12-23 13:00:24,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-23 13:00:24,302 INFO L208 MainTranslator]: Completed translation [2020-12-23 13:00:24,303 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:24 WrapperNode [2020-12-23 13:00:24,303 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-23 13:00:24,304 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-23 13:00:24,305 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-23 13:00:24,305 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-23 13:00:24,314 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:24" (1/1) ... [2020-12-23 13:00:24,331 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:24" (1/1) ... [2020-12-23 13:00:24,367 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-23 13:00:24,371 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-23 13:00:24,371 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-23 13:00:24,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-23 13:00:24,382 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:24" (1/1) ... [2020-12-23 13:00:24,383 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:24" (1/1) ... [2020-12-23 13:00:24,403 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:24" (1/1) ... [2020-12-23 13:00:24,406 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:24" (1/1) ... [2020-12-23 13:00:24,416 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:24" (1/1) ... [2020-12-23 13:00:24,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:24" (1/1) ... [2020-12-23 13:00:24,429 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:24" (1/1) ... [2020-12-23 13:00:24,440 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-23 13:00:24,441 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-23 13:00:24,441 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-23 13:00:24,442 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-23 13:00:24,446 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:24" (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 13:00:24,549 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-23 13:00:24,550 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-23 13:00:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-23 13:00:24,550 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-23 13:00:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-23 13:00:24,550 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-23 13:00:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-23 13:00:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-23 13:00:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-23 13:00:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-23 13:00:24,551 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-23 13:00:24,551 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-23 13:00:24,553 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 13:00:25,013 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-23 13:00:25,013 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-23 13:00:25,015 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:00:25 BoogieIcfgContainer [2020-12-23 13:00:25,016 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-23 13:00:25,017 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-23 13:00:25,018 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-23 13:00:25,021 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-23 13:00:25,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.12 01:00:23" (1/3) ... [2020-12-23 13:00:25,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615f2bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:00:25, skipping insertion in model container [2020-12-23 13:00:25,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.12 01:00:24" (2/3) ... [2020-12-23 13:00:25,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@615f2bc8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.12 01:00:25, skipping insertion in model container [2020-12-23 13:00:25,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.12 01:00:25" (3/3) ... [2020-12-23 13:00:25,025 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-2.i [2020-12-23 13:00:25,033 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-23 13:00:25,033 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-23 13:00:25,039 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-23 13:00:25,040 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-23 13:00:25,076 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,076 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,077 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,077 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,077 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,077 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,077 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,078 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,078 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,078 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,078 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,079 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,079 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,079 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,079 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,080 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,080 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,080 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,080 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,081 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,081 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,081 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,081 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,081 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,082 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,082 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,082 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,082 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,083 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,083 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,083 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,084 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,084 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,084 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,084 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,084 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,085 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,085 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,085 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,085 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,085 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,086 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,086 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,086 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,086 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,087 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,087 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,087 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,087 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,088 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,088 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,088 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,088 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,089 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,089 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,089 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,089 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,089 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,090 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,090 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,092 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,093 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,093 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,093 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,093 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,093 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,099 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,100 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,100 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,100 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,100 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,100 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-23 13:00:25,103 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-23 13:00:25,123 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-23 13:00:25,147 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-23 13:00:25,147 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-23 13:00:25,147 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-23 13:00:25,148 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-23 13:00:25,148 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-23 13:00:25,148 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-23 13:00:25,148 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-23 13:00:25,148 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-23 13:00:25,160 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-23 13:00:25,162 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 64 places, 62 transitions, 134 flow [2020-12-23 13:00:25,165 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 64 places, 62 transitions, 134 flow [2020-12-23 13:00:25,167 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 64 places, 62 transitions, 134 flow [2020-12-23 13:00:25,206 INFO L129 PetriNetUnfolder]: 5/60 cut-off events. [2020-12-23 13:00:25,207 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-23 13:00:25,211 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 5. Compared 88 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 13:00:25,213 INFO L116 LiptonReduction]: Number of co-enabled transitions 1080 [2020-12-23 13:00:27,529 WARN L197 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-23 13:00:27,632 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 76 [2020-12-23 13:00:27,742 WARN L197 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-12-23 13:00:28,152 WARN L197 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-12-23 13:00:28,291 WARN L197 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-23 13:00:28,608 WARN L197 SmtUtils]: Spent 311.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 87 [2020-12-23 13:00:28,751 WARN L197 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-12-23 13:00:28,756 INFO L131 LiptonReduction]: Checked pairs total: 1025 [2020-12-23 13:00:28,757 INFO L133 LiptonReduction]: Total number of compositions: 55 [2020-12-23 13:00:28,766 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-12-23 13:00:28,776 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-12-23 13:00:28,779 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-23 13:00:28,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-23 13:00:28,785 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:28,786 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-23 13:00:28,786 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:28,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:28,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1040872604, now seen corresponding path program 1 times [2020-12-23 13:00:28,803 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:28,803 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276492169] [2020-12-23 13:00:28,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:29,129 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 13:00:29,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276492169] [2020-12-23 13:00:29,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:29,131 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-23 13:00:29,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519158139] [2020-12-23 13:00:29,136 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-23 13:00:29,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:29,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-23 13:00:29,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-23 13:00:29,154 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-12-23 13:00:29,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:29,212 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-12-23 13:00:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 13:00:29,214 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-23 13:00:29,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:29,225 INFO L225 Difference]: With dead ends: 83 [2020-12-23 13:00:29,225 INFO L226 Difference]: Without dead ends: 54 [2020-12-23 13:00:29,227 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 13:00:29,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-23 13:00:29,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-12-23 13:00:29,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-23 13:00:29,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-12-23 13:00:29,267 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-12-23 13:00:29,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:29,267 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-12-23 13:00:29,267 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-23 13:00:29,267 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-12-23 13:00:29,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 13:00:29,268 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:29,269 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:29,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-23 13:00:29,269 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:29,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:29,270 INFO L82 PathProgramCache]: Analyzing trace with hash 947244113, now seen corresponding path program 1 times [2020-12-23 13:00:29,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:29,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342583205] [2020-12-23 13:00:29,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:29,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:29,389 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 13:00:29,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342583205] [2020-12-23 13:00:29,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:29,389 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:00:29,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921100011] [2020-12-23 13:00:29,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 13:00:29,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:29,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 13:00:29,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:00:29,392 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-12-23 13:00:29,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:29,438 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-12-23 13:00:29,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:00:29,439 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 13:00:29,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:29,441 INFO L225 Difference]: With dead ends: 80 [2020-12-23 13:00:29,441 INFO L226 Difference]: Without dead ends: 75 [2020-12-23 13:00:29,442 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 13:00:29,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-23 13:00:29,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-12-23 13:00:29,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-23 13:00:29,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-12-23 13:00:29,453 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-12-23 13:00:29,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:29,454 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-12-23 13:00:29,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 13:00:29,455 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-12-23 13:00:29,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 13:00:29,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:29,456 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:29,456 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-23 13:00:29,456 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:29,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:29,457 INFO L82 PathProgramCache]: Analyzing trace with hash 448812566, now seen corresponding path program 1 times [2020-12-23 13:00:29,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:29,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107310442] [2020-12-23 13:00:29,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:29,530 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 13:00:29,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107310442] [2020-12-23 13:00:29,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:29,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:00:29,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906523600] [2020-12-23 13:00:29,531 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 13:00:29,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:29,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 13:00:29,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:00:29,533 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-12-23 13:00:29,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:29,564 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-12-23 13:00:29,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-23 13:00:29,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 13:00:29,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:29,566 INFO L225 Difference]: With dead ends: 73 [2020-12-23 13:00:29,566 INFO L226 Difference]: Without dead ends: 70 [2020-12-23 13:00:29,567 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 13:00:29,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-23 13:00:29,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-12-23 13:00:29,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-23 13:00:29,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-12-23 13:00:29,578 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-12-23 13:00:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:29,578 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-12-23 13:00:29,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 13:00:29,578 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-12-23 13:00:29,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-23 13:00:29,579 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:29,579 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:29,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-23 13:00:29,580 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:29,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:29,581 INFO L82 PathProgramCache]: Analyzing trace with hash 449093426, now seen corresponding path program 2 times [2020-12-23 13:00:29,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:29,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685402475] [2020-12-23 13:00:29,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:29,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:29,650 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 13:00:29,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685402475] [2020-12-23 13:00:29,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:29,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-23 13:00:29,651 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670678566] [2020-12-23 13:00:29,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-23 13:00:29,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:29,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-23 13:00:29,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-23 13:00:29,653 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-12-23 13:00:29,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:29,697 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-12-23 13:00:29,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:00:29,705 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-23 13:00:29,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:29,707 INFO L225 Difference]: With dead ends: 86 [2020-12-23 13:00:29,707 INFO L226 Difference]: Without dead ends: 80 [2020-12-23 13:00:29,708 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 13:00:29,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-23 13:00:29,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-12-23 13:00:29,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-23 13:00:29,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-12-23 13:00:29,722 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-12-23 13:00:29,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:29,722 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-12-23 13:00:29,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-23 13:00:29,722 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-12-23 13:00:29,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 13:00:29,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:29,726 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:29,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-23 13:00:29,726 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:29,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:29,727 INFO L82 PathProgramCache]: Analyzing trace with hash -672996833, now seen corresponding path program 2 times [2020-12-23 13:00:29,727 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:29,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094720089] [2020-12-23 13:00:29,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:29,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:29,858 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 13:00:29,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094720089] [2020-12-23 13:00:29,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660578684] [2020-12-23 13:00:29,859 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 13:00:29,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:29,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:29,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:00:29,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:30,113 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:30,141 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 13:00:30,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:30,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-12-23 13:00:30,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714887622] [2020-12-23 13:00:30,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 13:00:30,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:30,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 13:00:30,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:00:30,144 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-12-23 13:00:30,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:30,273 INFO L93 Difference]: Finished difference Result 121 states and 281 transitions. [2020-12-23 13:00:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:00:30,274 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-12-23 13:00:30,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:30,276 INFO L225 Difference]: With dead ends: 121 [2020-12-23 13:00:30,276 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 13:00:30,277 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 13:00:30,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 13:00:30,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 76. [2020-12-23 13:00:30,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-23 13:00:30,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-12-23 13:00:30,286 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 9 [2020-12-23 13:00:30,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:30,287 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-12-23 13:00:30,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 13:00:30,287 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-12-23 13:00:30,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 13:00:30,288 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:30,288 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:30,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:30,503 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:30,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:30,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1028288236, now seen corresponding path program 3 times [2020-12-23 13:00:30,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:30,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440691151] [2020-12-23 13:00:30,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:30,632 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 13:00:30,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440691151] [2020-12-23 13:00:30,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496291917] [2020-12-23 13:00:30,634 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 13:00:30,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:30,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:30,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:00:30,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:30,873 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 13:00:30,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:30,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-12-23 13:00:30,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332943833] [2020-12-23 13:00:30,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 13:00:30,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:30,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 13:00:30,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:00:30,878 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 10 states. [2020-12-23 13:00:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:30,933 INFO L93 Difference]: Finished difference Result 89 states and 215 transitions. [2020-12-23 13:00:30,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-23 13:00:30,937 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-12-23 13:00:30,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:30,939 INFO L225 Difference]: With dead ends: 89 [2020-12-23 13:00:30,939 INFO L226 Difference]: Without dead ends: 86 [2020-12-23 13:00:30,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:00:30,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-12-23 13:00:30,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 79. [2020-12-23 13:00:30,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-23 13:00:30,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 195 transitions. [2020-12-23 13:00:30,954 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 195 transitions. Word has length 9 [2020-12-23 13:00:30,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:30,956 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 195 transitions. [2020-12-23 13:00:30,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 13:00:30,956 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 195 transitions. [2020-12-23 13:00:30,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 13:00:30,960 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:30,960 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:31,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:31,163 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:31,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:31,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1036994896, now seen corresponding path program 4 times [2020-12-23 13:00:31,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:31,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907207448] [2020-12-23 13:00:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:31,268 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 13:00:31,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907207448] [2020-12-23 13:00:31,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179431899] [2020-12-23 13:00:31,270 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 13:00:31,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:31,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:31,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:00:31,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:31,431 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 13:00:31,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:31,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-12-23 13:00:31,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630761052] [2020-12-23 13:00:31,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-23 13:00:31,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:31,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-23 13:00:31,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:00:31,433 INFO L87 Difference]: Start difference. First operand 79 states and 195 transitions. Second operand 10 states. [2020-12-23 13:00:31,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:31,513 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-12-23 13:00:31,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:00:31,513 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-12-23 13:00:31,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:31,514 INFO L225 Difference]: With dead ends: 95 [2020-12-23 13:00:31,515 INFO L226 Difference]: Without dead ends: 92 [2020-12-23 13:00:31,515 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:31,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-23 13:00:31,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-12-23 13:00:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-23 13:00:31,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 202 transitions. [2020-12-23 13:00:31,523 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 202 transitions. Word has length 9 [2020-12-23 13:00:31,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:31,523 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 202 transitions. [2020-12-23 13:00:31,524 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-23 13:00:31,524 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 202 transitions. [2020-12-23 13:00:31,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-12-23 13:00:31,525 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:31,525 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:31,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:31,739 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:31,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:31,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1037016286, now seen corresponding path program 5 times [2020-12-23 13:00:31,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:31,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994014207] [2020-12-23 13:00:31,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:31,801 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 13:00:31,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994014207] [2020-12-23 13:00:31,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063265294] [2020-12-23 13:00:31,802 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 13:00:31,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:31,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:31,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-23 13:00:31,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:31,943 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 13:00:31,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:31,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-12-23 13:00:31,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395759810] [2020-12-23 13:00:31,945 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:00:31,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:31,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:00:31,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-12-23 13:00:31,946 INFO L87 Difference]: Start difference. First operand 81 states and 202 transitions. Second operand 9 states. [2020-12-23 13:00:32,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:32,055 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-12-23 13:00:32,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:32,055 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-12-23 13:00:32,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:32,056 INFO L225 Difference]: With dead ends: 104 [2020-12-23 13:00:32,056 INFO L226 Difference]: Without dead ends: 98 [2020-12-23 13:00:32,057 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 13:00:32,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-23 13:00:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 82. [2020-12-23 13:00:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-23 13:00:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 206 transitions. [2020-12-23 13:00:32,064 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 206 transitions. Word has length 9 [2020-12-23 13:00:32,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:32,064 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 206 transitions. [2020-12-23 13:00:32,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:00:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 206 transitions. [2020-12-23 13:00:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:32,066 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:32,066 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:32,280 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:32,280 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:32,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:32,282 INFO L82 PathProgramCache]: Analyzing trace with hash -231469117, now seen corresponding path program 1 times [2020-12-23 13:00:32,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:32,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913783593] [2020-12-23 13:00:32,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:32,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:32,398 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 13:00:32,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913783593] [2020-12-23 13:00:32,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:32,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:00:32,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258895067] [2020-12-23 13:00:32,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:00:32,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:32,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:00:32,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:00:32,402 INFO L87 Difference]: Start difference. First operand 82 states and 206 transitions. Second operand 6 states. [2020-12-23 13:00:32,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:32,452 INFO L93 Difference]: Finished difference Result 101 states and 242 transitions. [2020-12-23 13:00:32,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:00:32,453 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:00:32,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:32,455 INFO L225 Difference]: With dead ends: 101 [2020-12-23 13:00:32,455 INFO L226 Difference]: Without dead ends: 99 [2020-12-23 13:00:32,456 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 13:00:32,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-23 13:00:32,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 88. [2020-12-23 13:00:32,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 13:00:32,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 216 transitions. [2020-12-23 13:00:32,475 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 216 transitions. Word has length 10 [2020-12-23 13:00:32,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:32,475 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 216 transitions. [2020-12-23 13:00:32,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:00:32,476 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 216 transitions. [2020-12-23 13:00:32,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:32,482 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:32,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:32,482 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-12-23 13:00:32,482 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:32,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:32,490 INFO L82 PathProgramCache]: Analyzing trace with hash -231188257, now seen corresponding path program 2 times [2020-12-23 13:00:32,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:32,491 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197867787] [2020-12-23 13:00:32,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:32,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:32,582 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 13:00:32,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197867787] [2020-12-23 13:00:32,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:32,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:00:32,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911515845] [2020-12-23 13:00:32,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:00:32,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:32,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:00:32,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:00:32,585 INFO L87 Difference]: Start difference. First operand 88 states and 216 transitions. Second operand 6 states. [2020-12-23 13:00:32,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:32,670 INFO L93 Difference]: Finished difference Result 116 states and 272 transitions. [2020-12-23 13:00:32,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:32,671 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:00:32,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:32,672 INFO L225 Difference]: With dead ends: 116 [2020-12-23 13:00:32,672 INFO L226 Difference]: Without dead ends: 111 [2020-12-23 13:00:32,672 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 13:00:32,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-23 13:00:32,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 87. [2020-12-23 13:00:32,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-12-23 13:00:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 214 transitions. [2020-12-23 13:00:32,677 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 214 transitions. Word has length 10 [2020-12-23 13:00:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:32,677 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 214 transitions. [2020-12-23 13:00:32,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:00:32,677 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 214 transitions. [2020-12-23 13:00:32,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:32,678 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:32,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:32,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-12-23 13:00:32,679 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:32,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:32,679 INFO L82 PathProgramCache]: Analyzing trace with hash -598460671, now seen corresponding path program 3 times [2020-12-23 13:00:32,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:32,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437306973] [2020-12-23 13:00:32,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:32,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:32,736 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 13:00:32,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437306973] [2020-12-23 13:00:32,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-23 13:00:32,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-23 13:00:32,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855776572] [2020-12-23 13:00:32,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-23 13:00:32,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:32,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-23 13:00:32,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-12-23 13:00:32,739 INFO L87 Difference]: Start difference. First operand 87 states and 214 transitions. Second operand 6 states. [2020-12-23 13:00:32,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:32,816 INFO L93 Difference]: Finished difference Result 110 states and 262 transitions. [2020-12-23 13:00:32,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:32,817 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-23 13:00:32,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:32,821 INFO L225 Difference]: With dead ends: 110 [2020-12-23 13:00:32,821 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 13:00:32,822 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 13:00:32,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 13:00:32,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 88. [2020-12-23 13:00:32,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-23 13:00:32,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-12-23 13:00:32,826 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-12-23 13:00:32,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:32,827 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-12-23 13:00:32,827 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-23 13:00:32,827 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-12-23 13:00:32,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:32,828 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:32,828 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:32,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-12-23 13:00:32,828 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:32,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:32,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1812164822, now seen corresponding path program 6 times [2020-12-23 13:00:32,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:32,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834678304] [2020-12-23 13:00:32,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:32,941 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 13:00:32,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834678304] [2020-12-23 13:00:32,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838983439] [2020-12-23 13:00:32,944 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 13:00:33,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:33,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:33,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:33,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:33,115 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 13:00:33,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:33,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-23 13:00:33,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873982638] [2020-12-23 13:00:33,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:00:33,120 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:33,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:00:33,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:00:33,121 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 12 states. [2020-12-23 13:00:33,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:33,159 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-12-23 13:00:33,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-23 13:00:33,160 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-12-23 13:00:33,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:33,161 INFO L225 Difference]: With dead ends: 108 [2020-12-23 13:00:33,161 INFO L226 Difference]: Without dead ends: 105 [2020-12-23 13:00:33,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:00:33,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-23 13:00:33,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-12-23 13:00:33,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-23 13:00:33,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-12-23 13:00:33,168 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-12-23 13:00:33,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:33,168 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-12-23 13:00:33,168 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:00:33,169 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-12-23 13:00:33,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:33,169 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:33,170 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:33,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-12-23 13:00:33,383 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:33,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:33,384 INFO L82 PathProgramCache]: Analyzing trace with hash 2082071282, now seen corresponding path program 7 times [2020-12-23 13:00:33,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:33,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651311036] [2020-12-23 13:00:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:33,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:33,473 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 13:00:33,473 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651311036] [2020-12-23 13:00:33,474 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002529564] [2020-12-23 13:00:33,474 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 13:00:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:33,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:33,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:33,674 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 13:00:33,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:33,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-23 13:00:33,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118655677] [2020-12-23 13:00:33,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:00:33,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:33,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:00:33,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:00:33,678 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 12 states. [2020-12-23 13:00:33,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:33,740 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-12-23 13:00:33,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:00:33,741 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-12-23 13:00:33,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:33,742 INFO L225 Difference]: With dead ends: 116 [2020-12-23 13:00:33,742 INFO L226 Difference]: Without dead ends: 113 [2020-12-23 13:00:33,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:33,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-23 13:00:33,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-12-23 13:00:33,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-12-23 13:00:33,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-12-23 13:00:33,747 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-12-23 13:00:33,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:33,748 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-12-23 13:00:33,748 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:00:33,748 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-12-23 13:00:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:33,749 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:33,749 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:33,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:33,963 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:33,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:33,964 INFO L82 PathProgramCache]: Analyzing trace with hash 2082734372, now seen corresponding path program 8 times [2020-12-23 13:00:33,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:33,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [359189300] [2020-12-23 13:00:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:33,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:34,028 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 13:00:34,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [359189300] [2020-12-23 13:00:34,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282952875] [2020-12-23 13:00:34,029 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 13:00:34,103 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:34,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:34,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:34,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:34,217 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 13:00:34,217 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:34,217 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-23 13:00:34,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820550313] [2020-12-23 13:00:34,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:00:34,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:34,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:00:34,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:00:34,219 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 12 states. [2020-12-23 13:00:34,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:34,314 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-12-23 13:00:34,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:34,315 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-12-23 13:00:34,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:34,316 INFO L225 Difference]: With dead ends: 115 [2020-12-23 13:00:34,316 INFO L226 Difference]: Without dead ends: 112 [2020-12-23 13:00:34,316 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=120, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:34,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-23 13:00:34,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-12-23 13:00:34,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-23 13:00:34,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-12-23 13:00:34,321 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-12-23 13:00:34,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:34,321 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-12-23 13:00:34,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:00:34,321 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-12-23 13:00:34,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-23 13:00:34,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:34,322 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:34,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-23 13:00:34,537 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:34,538 INFO L82 PathProgramCache]: Analyzing trace with hash 2082755762, now seen corresponding path program 9 times [2020-12-23 13:00:34,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:34,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438649205] [2020-12-23 13:00:34,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:34,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:34,658 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 13:00:34,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438649205] [2020-12-23 13:00:34,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735142389] [2020-12-23 13:00:34,660 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 13:00:34,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:34,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:34,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:34,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:34,809 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 13:00:34,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:34,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-23 13:00:34,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778313195] [2020-12-23 13:00:34,811 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:00:34,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:34,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:00:34,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:00:34,812 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 12 states. [2020-12-23 13:00:34,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:34,983 INFO L93 Difference]: Finished difference Result 140 states and 332 transitions. [2020-12-23 13:00:34,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:00:34,984 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-12-23 13:00:34,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:34,985 INFO L225 Difference]: With dead ends: 140 [2020-12-23 13:00:34,985 INFO L226 Difference]: Without dead ends: 128 [2020-12-23 13:00:34,986 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:00:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-23 13:00:34,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 100. [2020-12-23 13:00:34,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-23 13:00:34,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 249 transitions. [2020-12-23 13:00:34,991 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 249 transitions. Word has length 10 [2020-12-23 13:00:34,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:34,991 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 249 transitions. [2020-12-23 13:00:34,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:00:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 249 transitions. [2020-12-23 13:00:34,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:34,992 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:34,992 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:35,206 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-23 13:00:35,207 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:35,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:35,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1634246561, now seen corresponding path program 3 times [2020-12-23 13:00:35,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:35,209 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329527365] [2020-12-23 13:00:35,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:35,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:35,347 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 13:00:35,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329527365] [2020-12-23 13:00:35,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205874406] [2020-12-23 13:00:35,348 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 13:00:35,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:00:35,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:35,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:35,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:35,539 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:35,562 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 13:00:35,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:35,563 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:35,563 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650643593] [2020-12-23 13:00:35,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:35,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:35,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:35,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:35,565 INFO L87 Difference]: Start difference. First operand 100 states and 249 transitions. Second operand 14 states. [2020-12-23 13:00:35,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:35,736 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-12-23 13:00:35,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:00:35,738 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-12-23 13:00:35,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:35,740 INFO L225 Difference]: With dead ends: 167 [2020-12-23 13:00:35,740 INFO L226 Difference]: Without dead ends: 159 [2020-12-23 13:00:35,741 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 13:00:35,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-12-23 13:00:35,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 110. [2020-12-23 13:00:35,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-23 13:00:35,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 281 transitions. [2020-12-23 13:00:35,746 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 281 transitions. Word has length 11 [2020-12-23 13:00:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:35,747 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 281 transitions. [2020-12-23 13:00:35,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:35,747 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 281 transitions. [2020-12-23 13:00:35,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:35,747 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:35,748 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:35,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-23 13:00:35,962 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:35,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:35,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1790110225, now seen corresponding path program 4 times [2020-12-23 13:00:35,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:35,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399835564] [2020-12-23 13:00:35,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:36,053 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 13:00:36,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399835564] [2020-12-23 13:00:36,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878269113] [2020-12-23 13:00:36,054 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 13:00:36,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:36,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:36,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:36,139 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:36,232 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 13:00:36,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:36,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:36,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750345210] [2020-12-23 13:00:36,237 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:36,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:36,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:36,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:36,242 INFO L87 Difference]: Start difference. First operand 110 states and 281 transitions. Second operand 11 states. [2020-12-23 13:00:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:36,330 INFO L93 Difference]: Finished difference Result 132 states and 323 transitions. [2020-12-23 13:00:36,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:36,331 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:36,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:36,332 INFO L225 Difference]: With dead ends: 132 [2020-12-23 13:00:36,332 INFO L226 Difference]: Without dead ends: 130 [2020-12-23 13:00:36,333 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 13:00:36,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-23 13:00:36,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 116. [2020-12-23 13:00:36,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-12-23 13:00:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 293 transitions. [2020-12-23 13:00:36,339 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 293 transitions. Word has length 11 [2020-12-23 13:00:36,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:36,339 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 293 transitions. [2020-12-23 13:00:36,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:36,339 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 293 transitions. [2020-12-23 13:00:36,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:36,340 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:36,340 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:36,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-23 13:00:36,555 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:36,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:36,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1790391085, now seen corresponding path program 5 times [2020-12-23 13:00:36,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:36,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99553746] [2020-12-23 13:00:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:36,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:36,636 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 13:00:36,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99553746] [2020-12-23 13:00:36,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446457647] [2020-12-23 13:00:36,637 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 13:00:36,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:36,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:36,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:36,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:36,790 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:00:36,795 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:00:36,821 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:36,846 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 13:00:36,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:36,847 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-23 13:00:36,847 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804913912] [2020-12-23 13:00:36,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:00:36,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:36,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:00:36,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:00:36,849 INFO L87 Difference]: Start difference. First operand 116 states and 293 transitions. Second operand 12 states. [2020-12-23 13:00:37,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:37,107 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-12-23 13:00:37,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:00:37,108 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-23 13:00:37,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:37,109 INFO L225 Difference]: With dead ends: 178 [2020-12-23 13:00:37,109 INFO L226 Difference]: Without dead ends: 166 [2020-12-23 13:00:37,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=259, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:00:37,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-12-23 13:00:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-12-23 13:00:37,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 13:00:37,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 292 transitions. [2020-12-23 13:00:37,116 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 292 transitions. Word has length 11 [2020-12-23 13:00:37,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:37,116 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 292 transitions. [2020-12-23 13:00:37,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:00:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 292 transitions. [2020-12-23 13:00:37,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:37,117 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:37,118 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:37,332 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-23 13:00:37,333 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:37,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:37,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1642922929, now seen corresponding path program 6 times [2020-12-23 13:00:37,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:37,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309472875] [2020-12-23 13:00:37,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:37,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:37,436 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 13:00:37,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309472875] [2020-12-23 13:00:37,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954236594] [2020-12-23 13:00:37,437 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 13:00:37,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:37,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:37,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:37,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:37,567 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 13:00:37,567 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:37,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:37,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723692276] [2020-12-23 13:00:37,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:37,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:37,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:37,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:37,569 INFO L87 Difference]: Start difference. First operand 113 states and 292 transitions. Second operand 11 states. [2020-12-23 13:00:37,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:37,640 INFO L93 Difference]: Finished difference Result 140 states and 346 transitions. [2020-12-23 13:00:37,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-23 13:00:37,640 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:37,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:37,642 INFO L225 Difference]: With dead ends: 140 [2020-12-23 13:00:37,642 INFO L226 Difference]: Without dead ends: 138 [2020-12-23 13:00:37,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:37,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-12-23 13:00:37,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 115. [2020-12-23 13:00:37,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 13:00:37,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 297 transitions. [2020-12-23 13:00:37,647 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 297 transitions. Word has length 11 [2020-12-23 13:00:37,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:37,647 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 297 transitions. [2020-12-23 13:00:37,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:37,647 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 297 transitions. [2020-12-23 13:00:37,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:37,648 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:37,648 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:37,863 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:37,864 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:37,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:37,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1373016469, now seen corresponding path program 7 times [2020-12-23 13:00:37,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:37,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55131203] [2020-12-23 13:00:37,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:37,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:37,931 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 13:00:37,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55131203] [2020-12-23 13:00:37,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338450179] [2020-12-23 13:00:37,931 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 13:00:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:37,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:37,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:38,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:38,071 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:38,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:38,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600013367] [2020-12-23 13:00:38,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:38,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:38,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:38,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:38,073 INFO L87 Difference]: Start difference. First operand 115 states and 297 transitions. Second operand 11 states. [2020-12-23 13:00:38,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:38,167 INFO L93 Difference]: Finished difference Result 143 states and 351 transitions. [2020-12-23 13:00:38,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:00:38,167 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:38,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:38,169 INFO L225 Difference]: With dead ends: 143 [2020-12-23 13:00:38,169 INFO L226 Difference]: Without dead ends: 141 [2020-12-23 13:00:38,169 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 13:00:38,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-23 13:00:38,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2020-12-23 13:00:38,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-23 13:00:38,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 292 transitions. [2020-12-23 13:00:38,174 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 292 transitions. Word has length 11 [2020-12-23 13:00:38,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:38,174 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 292 transitions. [2020-12-23 13:00:38,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:38,174 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 292 transitions. [2020-12-23 13:00:38,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:38,175 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:38,175 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:38,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2020-12-23 13:00:38,390 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:38,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:38,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1372411039, now seen corresponding path program 8 times [2020-12-23 13:00:38,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:38,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689596907] [2020-12-23 13:00:38,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:38,455 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 13:00:38,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689596907] [2020-12-23 13:00:38,455 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406030555] [2020-12-23 13:00:38,455 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 13:00:38,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:38,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:38,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:38,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:38,618 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 13:00:38,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:38,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:38,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188378984] [2020-12-23 13:00:38,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:38,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:38,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:38,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:38,620 INFO L87 Difference]: Start difference. First operand 113 states and 292 transitions. Second operand 11 states. [2020-12-23 13:00:38,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:38,752 INFO L93 Difference]: Finished difference Result 150 states and 361 transitions. [2020-12-23 13:00:38,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:00:38,753 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:38,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:38,754 INFO L225 Difference]: With dead ends: 150 [2020-12-23 13:00:38,754 INFO L226 Difference]: Without dead ends: 148 [2020-12-23 13:00:38,755 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 13:00:38,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-23 13:00:38,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 115. [2020-12-23 13:00:38,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 13:00:38,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 299 transitions. [2020-12-23 13:00:38,760 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 299 transitions. Word has length 11 [2020-12-23 13:00:38,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:38,760 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 299 transitions. [2020-12-23 13:00:38,760 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:38,760 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 299 transitions. [2020-12-23 13:00:38,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:38,761 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:38,761 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:38,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:38,975 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:38,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:38,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1372391571, now seen corresponding path program 9 times [2020-12-23 13:00:38,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:38,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97585015] [2020-12-23 13:00:38,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:38,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:39,046 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 13:00:39,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97585015] [2020-12-23 13:00:39,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389783107] [2020-12-23 13:00:39,047 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 13:00:39,116 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:39,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:39,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:39,184 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:39,193 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 13:00:39,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:39,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-12-23 13:00:39,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074141840] [2020-12-23 13:00:39,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-23 13:00:39,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:39,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-23 13:00:39,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:00:39,196 INFO L87 Difference]: Start difference. First operand 115 states and 299 transitions. Second operand 11 states. [2020-12-23 13:00:39,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:39,379 INFO L93 Difference]: Finished difference Result 162 states and 393 transitions. [2020-12-23 13:00:39,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:00:39,385 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-12-23 13:00:39,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:39,386 INFO L225 Difference]: With dead ends: 162 [2020-12-23 13:00:39,387 INFO L226 Difference]: Without dead ends: 154 [2020-12-23 13:00:39,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:00:39,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-12-23 13:00:39,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 115. [2020-12-23 13:00:39,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 13:00:39,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 299 transitions. [2020-12-23 13:00:39,392 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 299 transitions. Word has length 11 [2020-12-23 13:00:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:39,393 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 299 transitions. [2020-12-23 13:00:39,393 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-23 13:00:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 299 transitions. [2020-12-23 13:00:39,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-23 13:00:39,393 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:39,394 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:39,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-12-23 13:00:39,609 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:39,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:39,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1372389649, now seen corresponding path program 10 times [2020-12-23 13:00:39,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:39,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741945553] [2020-12-23 13:00:39,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:39,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:39,698 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 13:00:39,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741945553] [2020-12-23 13:00:39,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4293362] [2020-12-23 13:00:39,699 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 13:00:39,761 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:39,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:39,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-23 13:00:39,763 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:39,839 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 13:00:39,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:39,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-12-23 13:00:39,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557902080] [2020-12-23 13:00:39,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-23 13:00:39,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:39,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-23 13:00:39,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-12-23 13:00:39,841 INFO L87 Difference]: Start difference. First operand 115 states and 299 transitions. Second operand 12 states. [2020-12-23 13:00:40,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:40,153 INFO L93 Difference]: Finished difference Result 193 states and 460 transitions. [2020-12-23 13:00:40,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:00:40,153 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-12-23 13:00:40,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:40,155 INFO L225 Difference]: With dead ends: 193 [2020-12-23 13:00:40,155 INFO L226 Difference]: Without dead ends: 181 [2020-12-23 13:00:40,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=150, Invalid=312, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:00:40,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-12-23 13:00:40,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 115. [2020-12-23 13:00:40,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-23 13:00:40,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 298 transitions. [2020-12-23 13:00:40,161 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 298 transitions. Word has length 11 [2020-12-23 13:00:40,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:40,162 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 298 transitions. [2020-12-23 13:00:40,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-23 13:00:40,162 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 298 transitions. [2020-12-23 13:00:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:40,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:40,163 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:40,376 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:40,377 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:40,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:40,378 INFO L82 PathProgramCache]: Analyzing trace with hash 34560387, now seen corresponding path program 11 times [2020-12-23 13:00:40,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:40,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937422576] [2020-12-23 13:00:40,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:40,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:40,463 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 13:00:40,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937422576] [2020-12-23 13:00:40,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365834989] [2020-12-23 13:00:40,464 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 13:00:40,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:40,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:40,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:40,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:40,675 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 13:00:40,675 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:40,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:40,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061744963] [2020-12-23 13:00:40,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:40,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:40,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:40,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:40,677 INFO L87 Difference]: Start difference. First operand 115 states and 298 transitions. Second operand 13 states. [2020-12-23 13:00:40,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:40,788 INFO L93 Difference]: Finished difference Result 149 states and 358 transitions. [2020-12-23 13:00:40,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:00:40,788 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:40,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:40,791 INFO L225 Difference]: With dead ends: 149 [2020-12-23 13:00:40,791 INFO L226 Difference]: Without dead ends: 147 [2020-12-23 13:00:40,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:40,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-23 13:00:40,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 122. [2020-12-23 13:00:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-12-23 13:00:40,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 311 transitions. [2020-12-23 13:00:40,801 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 311 transitions. Word has length 12 [2020-12-23 13:00:40,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:40,801 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 311 transitions. [2020-12-23 13:00:40,801 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:40,801 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 311 transitions. [2020-12-23 13:00:40,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:40,802 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:40,802 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:41,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-23 13:00:41,016 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:41,017 INFO L82 PathProgramCache]: Analyzing trace with hash 34841247, now seen corresponding path program 12 times [2020-12-23 13:00:41,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:41,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159059263] [2020-12-23 13:00:41,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:41,088 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 13:00:41,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159059263] [2020-12-23 13:00:41,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587284920] [2020-12-23 13:00:41,089 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 13:00:41,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:41,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:41,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:41,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:41,254 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:00:41,258 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:00:41,263 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:41,274 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 13:00:41,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:41,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:41,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236415970] [2020-12-23 13:00:41,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:41,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:41,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:41,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:41,277 INFO L87 Difference]: Start difference. First operand 122 states and 311 transitions. Second operand 13 states. [2020-12-23 13:00:41,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:41,561 INFO L93 Difference]: Finished difference Result 180 states and 432 transitions. [2020-12-23 13:00:41,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:00:41,562 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:41,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:41,563 INFO L225 Difference]: With dead ends: 180 [2020-12-23 13:00:41,563 INFO L226 Difference]: Without dead ends: 172 [2020-12-23 13:00:41,564 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 13:00:41,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-23 13:00:41,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 121. [2020-12-23 13:00:41,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-12-23 13:00:41,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 309 transitions. [2020-12-23 13:00:41,569 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 309 transitions. Word has length 12 [2020-12-23 13:00:41,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:41,569 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 309 transitions. [2020-12-23 13:00:41,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:41,569 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 309 transitions. [2020-12-23 13:00:41,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:41,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:41,570 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:41,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-23 13:00:41,784 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:41,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:41,785 INFO L82 PathProgramCache]: Analyzing trace with hash 896494529, now seen corresponding path program 13 times [2020-12-23 13:00:41,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:41,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100974877] [2020-12-23 13:00:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:41,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:41,907 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 13:00:41,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100974877] [2020-12-23 13:00:41,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107417986] [2020-12-23 13:00:41,911 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 13:00:41,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:41,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:41,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:42,078 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 13:00:42,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:42,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:42,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663452421] [2020-12-23 13:00:42,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:42,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:42,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:42,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:42,081 INFO L87 Difference]: Start difference. First operand 121 states and 309 transitions. Second operand 13 states. [2020-12-23 13:00:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:42,275 INFO L93 Difference]: Finished difference Result 164 states and 391 transitions. [2020-12-23 13:00:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:00:42,275 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:42,278 INFO L225 Difference]: With dead ends: 164 [2020-12-23 13:00:42,278 INFO L226 Difference]: Without dead ends: 162 [2020-12-23 13:00:42,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:00:42,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-12-23 13:00:42,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 126. [2020-12-23 13:00:42,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-12-23 13:00:42,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 316 transitions. [2020-12-23 13:00:42,285 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 316 transitions. Word has length 12 [2020-12-23 13:00:42,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:42,285 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 316 transitions. [2020-12-23 13:00:42,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:42,285 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 316 transitions. [2020-12-23 13:00:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:42,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:42,286 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:42,500 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-23 13:00:42,501 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:42,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:42,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1166400989, now seen corresponding path program 14 times [2020-12-23 13:00:42,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:42,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345154749] [2020-12-23 13:00:42,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:42,574 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 13:00:42,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345154749] [2020-12-23 13:00:42,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650652358] [2020-12-23 13:00:42,575 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 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 13:00:42,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:42,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:42,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:42,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:42,761 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 13:00:42,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:42,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:42,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641479952] [2020-12-23 13:00:42,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:42,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:42,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:42,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:42,764 INFO L87 Difference]: Start difference. First operand 126 states and 316 transitions. Second operand 13 states. [2020-12-23 13:00:42,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:42,994 INFO L93 Difference]: Finished difference Result 174 states and 411 transitions. [2020-12-23 13:00:42,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:00:42,995 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:42,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:42,996 INFO L225 Difference]: With dead ends: 174 [2020-12-23 13:00:42,996 INFO L226 Difference]: Without dead ends: 172 [2020-12-23 13:00:42,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=106, Invalid=236, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:00:42,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-23 13:00:43,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 128. [2020-12-23 13:00:43,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 13:00:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 323 transitions. [2020-12-23 13:00:43,003 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 323 transitions. Word has length 12 [2020-12-23 13:00:43,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:43,003 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 323 transitions. [2020-12-23 13:00:43,003 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:43,003 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 323 transitions. [2020-12-23 13:00:43,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:43,004 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:43,004 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:43,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-23 13:00:43,220 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:43,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:43,220 INFO L82 PathProgramCache]: Analyzing trace with hash 1167006419, now seen corresponding path program 15 times [2020-12-23 13:00:43,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:43,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276324053] [2020-12-23 13:00:43,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:43,294 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 13:00:43,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276324053] [2020-12-23 13:00:43,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350673798] [2020-12-23 13:00:43,295 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 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 13:00:43,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:43,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:43,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:43,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:43,469 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 13:00:43,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:43,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:43,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109041737] [2020-12-23 13:00:43,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:43,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:43,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:43,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:43,471 INFO L87 Difference]: Start difference. First operand 128 states and 323 transitions. Second operand 13 states. [2020-12-23 13:00:43,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:43,766 INFO L93 Difference]: Finished difference Result 174 states and 416 transitions. [2020-12-23 13:00:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:00:43,770 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:43,771 INFO L225 Difference]: With dead ends: 174 [2020-12-23 13:00:43,772 INFO L226 Difference]: Without dead ends: 172 [2020-12-23 13:00:43,772 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=140, Invalid=280, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:00:43,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-23 13:00:43,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 130. [2020-12-23 13:00:43,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 13:00:43,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 330 transitions. [2020-12-23 13:00:43,778 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 330 transitions. Word has length 12 [2020-12-23 13:00:43,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:43,778 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 330 transitions. [2020-12-23 13:00:43,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:43,778 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 330 transitions. [2020-12-23 13:00:43,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:43,779 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:43,779 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:43,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-23 13:00:43,993 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:43,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:43,994 INFO L82 PathProgramCache]: Analyzing trace with hash 1167025887, now seen corresponding path program 16 times [2020-12-23 13:00:43,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:43,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945877532] [2020-12-23 13:00:43,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:44,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:44,107 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 13:00:44,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945877532] [2020-12-23 13:00:44,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191757553] [2020-12-23 13:00:44,108 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 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 13:00:44,177 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:44,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:44,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:44,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:44,286 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:44,309 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 13:00:44,309 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:44,309 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:44,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537686780] [2020-12-23 13:00:44,310 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:44,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:44,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:44,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:44,311 INFO L87 Difference]: Start difference. First operand 130 states and 330 transitions. Second operand 14 states. [2020-12-23 13:00:44,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:44,762 INFO L93 Difference]: Finished difference Result 209 states and 492 transitions. [2020-12-23 13:00:44,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:00:44,762 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:44,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:44,764 INFO L225 Difference]: With dead ends: 209 [2020-12-23 13:00:44,764 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 13:00:44,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=273, Invalid=597, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:00:44,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 13:00:44,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 129. [2020-12-23 13:00:44,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-12-23 13:00:44,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 330 transitions. [2020-12-23 13:00:44,771 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 330 transitions. Word has length 12 [2020-12-23 13:00:44,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:44,771 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 330 transitions. [2020-12-23 13:00:44,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:44,771 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 330 transitions. [2020-12-23 13:00:44,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:44,772 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:44,772 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:44,985 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:44,986 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:44,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:44,986 INFO L82 PathProgramCache]: Analyzing trace with hash 609054991, now seen corresponding path program 17 times [2020-12-23 13:00:44,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:44,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488188668] [2020-12-23 13:00:44,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:45,066 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 13:00:45,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488188668] [2020-12-23 13:00:45,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1397801816] [2020-12-23 13:00:45,066 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 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 13:00:45,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:45,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:45,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:45,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:45,243 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 13:00:45,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:45,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:45,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575440822] [2020-12-23 13:00:45,244 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:45,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:45,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:45,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:45,245 INFO L87 Difference]: Start difference. First operand 129 states and 330 transitions. Second operand 13 states. [2020-12-23 13:00:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:45,350 INFO L93 Difference]: Finished difference Result 165 states and 404 transitions. [2020-12-23 13:00:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:45,351 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:45,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:45,352 INFO L225 Difference]: With dead ends: 165 [2020-12-23 13:00:45,352 INFO L226 Difference]: Without dead ends: 163 [2020-12-23 13:00:45,353 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-12-23 13:00:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 132. [2020-12-23 13:00:45,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 13:00:45,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 337 transitions. [2020-12-23 13:00:45,359 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 337 transitions. Word has length 12 [2020-12-23 13:00:45,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:45,359 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 337 transitions. [2020-12-23 13:00:45,359 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:45,359 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 337 transitions. [2020-12-23 13:00:45,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:45,360 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:45,360 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:45,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:45,574 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:45,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:45,575 INFO L82 PathProgramCache]: Analyzing trace with hash 386220659, now seen corresponding path program 18 times [2020-12-23 13:00:45,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:45,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224912560] [2020-12-23 13:00:45,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:45,657 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 13:00:45,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224912560] [2020-12-23 13:00:45,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592810035] [2020-12-23 13:00:45,657 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 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 13:00:45,728 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:45,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:45,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:45,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:45,825 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 13:00:45,825 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:45,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:45,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007241663] [2020-12-23 13:00:45,826 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:45,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:45,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:45,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:45,827 INFO L87 Difference]: Start difference. First operand 132 states and 337 transitions. Second operand 13 states. [2020-12-23 13:00:45,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:45,996 INFO L93 Difference]: Finished difference Result 173 states and 418 transitions. [2020-12-23 13:00:45,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:00:45,997 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:45,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:45,999 INFO L225 Difference]: With dead ends: 173 [2020-12-23 13:00:45,999 INFO L226 Difference]: Without dead ends: 171 [2020-12-23 13:00:46,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:00:46,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-23 13:00:46,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 130. [2020-12-23 13:00:46,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 13:00:46,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 332 transitions. [2020-12-23 13:00:46,005 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 332 transitions. Word has length 12 [2020-12-23 13:00:46,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:46,006 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 332 transitions. [2020-12-23 13:00:46,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:46,006 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 332 transitions. [2020-12-23 13:00:46,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:46,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:46,007 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:46,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:46,221 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:46,222 INFO L82 PathProgramCache]: Analyzing trace with hash 406776449, now seen corresponding path program 19 times [2020-12-23 13:00:46,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:46,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097494672] [2020-12-23 13:00:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:46,301 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 13:00:46,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097494672] [2020-12-23 13:00:46,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049631159] [2020-12-23 13:00:46,301 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 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 13:00:46,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:46,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:46,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:46,486 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 13:00:46,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:46,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:46,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731401463] [2020-12-23 13:00:46,487 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:46,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:46,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:46,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:46,488 INFO L87 Difference]: Start difference. First operand 130 states and 332 transitions. Second operand 13 states. [2020-12-23 13:00:46,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:46,641 INFO L93 Difference]: Finished difference Result 175 states and 421 transitions. [2020-12-23 13:00:46,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:00:46,641 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:46,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:46,643 INFO L225 Difference]: With dead ends: 175 [2020-12-23 13:00:46,643 INFO L226 Difference]: Without dead ends: 173 [2020-12-23 13:00:46,643 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:00:46,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-12-23 13:00:46,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 128. [2020-12-23 13:00:46,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-12-23 13:00:46,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 327 transitions. [2020-12-23 13:00:46,648 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 327 transitions. Word has length 12 [2020-12-23 13:00:46,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:46,649 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 327 transitions. [2020-12-23 13:00:46,649 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 327 transitions. [2020-12-23 13:00:46,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:46,649 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:46,649 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:46,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-12-23 13:00:46,864 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:46,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:46,865 INFO L82 PathProgramCache]: Analyzing trace with hash 407381879, now seen corresponding path program 20 times [2020-12-23 13:00:46,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:46,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218478448] [2020-12-23 13:00:46,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:46,960 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 13:00:46,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218478448] [2020-12-23 13:00:46,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1542526002] [2020-12-23 13:00:46,961 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 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 13:00:47,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:47,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:47,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:47,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:47,166 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 13:00:47,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:47,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-12-23 13:00:47,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501629350] [2020-12-23 13:00:47,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-23 13:00:47,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:47,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-23 13:00:47,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-12-23 13:00:47,168 INFO L87 Difference]: Start difference. First operand 128 states and 327 transitions. Second operand 13 states. [2020-12-23 13:00:47,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:47,367 INFO L93 Difference]: Finished difference Result 173 states and 415 transitions. [2020-12-23 13:00:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:00:47,368 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-12-23 13:00:47,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:47,370 INFO L225 Difference]: With dead ends: 173 [2020-12-23 13:00:47,370 INFO L226 Difference]: Without dead ends: 171 [2020-12-23 13:00:47,371 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:00:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-23 13:00:47,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 130. [2020-12-23 13:00:47,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-12-23 13:00:47,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 334 transitions. [2020-12-23 13:00:47,376 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 334 transitions. Word has length 12 [2020-12-23 13:00:47,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:47,376 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 334 transitions. [2020-12-23 13:00:47,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-23 13:00:47,377 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 334 transitions. [2020-12-23 13:00:47,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:47,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:47,377 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:47,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:47,591 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:47,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:47,591 INFO L82 PathProgramCache]: Analyzing trace with hash 407401347, now seen corresponding path program 21 times [2020-12-23 13:00:47,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:47,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798307612] [2020-12-23 13:00:47,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:47,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:47,664 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 13:00:47,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798307612] [2020-12-23 13:00:47,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795078440] [2020-12-23 13:00:47,664 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 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 13:00:47,721 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:00:47,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:47,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-23 13:00:47,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:47,825 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:47,850 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 13:00:47,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:47,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-12-23 13:00:47,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218348496] [2020-12-23 13:00:47,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-23 13:00:47,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:47,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-23 13:00:47,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-12-23 13:00:47,853 INFO L87 Difference]: Start difference. First operand 130 states and 334 transitions. Second operand 14 states. [2020-12-23 13:00:48,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:48,235 INFO L93 Difference]: Finished difference Result 215 states and 509 transitions. [2020-12-23 13:00:48,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:00:48,236 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-12-23 13:00:48,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:48,238 INFO L225 Difference]: With dead ends: 215 [2020-12-23 13:00:48,238 INFO L226 Difference]: Without dead ends: 203 [2020-12-23 13:00:48,239 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:00:48,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-12-23 13:00:48,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 125. [2020-12-23 13:00:48,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-12-23 13:00:48,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 314 transitions. [2020-12-23 13:00:48,245 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 314 transitions. Word has length 12 [2020-12-23 13:00:48,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:48,245 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 314 transitions. [2020-12-23 13:00:48,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-23 13:00:48,245 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 314 transitions. [2020-12-23 13:00:48,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:48,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:48,246 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:48,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-23 13:00:48,449 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:48,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:48,449 INFO L82 PathProgramCache]: Analyzing trace with hash 2028657558, now seen corresponding path program 10 times [2020-12-23 13:00:48,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:48,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040881708] [2020-12-23 13:00:48,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:48,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:48,540 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 13:00:48,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040881708] [2020-12-23 13:00:48,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927026127] [2020-12-23 13:00:48,541 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 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 13:00:48,606 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:48,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:48,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:48,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:48,752 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 13:00:48,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:48,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-12-23 13:00:48,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535157791] [2020-12-23 13:00:48,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:00:48,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:48,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:00:48,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:00:48,754 INFO L87 Difference]: Start difference. First operand 125 states and 314 transitions. Second operand 15 states. [2020-12-23 13:00:48,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:48,823 INFO L93 Difference]: Finished difference Result 160 states and 385 transitions. [2020-12-23 13:00:48,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:00:48,824 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-12-23 13:00:48,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:48,825 INFO L225 Difference]: With dead ends: 160 [2020-12-23 13:00:48,826 INFO L226 Difference]: Without dead ends: 157 [2020-12-23 13:00:48,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:00:48,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-23 13:00:48,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 132. [2020-12-23 13:00:48,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 13:00:48,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 330 transitions. [2020-12-23 13:00:48,831 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 330 transitions. Word has length 12 [2020-12-23 13:00:48,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:48,831 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 330 transitions. [2020-12-23 13:00:48,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:00:48,831 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 330 transitions. [2020-12-23 13:00:48,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:48,832 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:48,832 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:49,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:49,033 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:49,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:49,034 INFO L82 PathProgramCache]: Analyzing trace with hash -584239438, now seen corresponding path program 11 times [2020-12-23 13:00:49,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:49,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989621464] [2020-12-23 13:00:49,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:49,121 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 13:00:49,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989621464] [2020-12-23 13:00:49,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262987052] [2020-12-23 13:00:49,122 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 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 13:00:49,194 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:00:49,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:49,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:49,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:49,323 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:00:49,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:49,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-12-23 13:00:49,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850269713] [2020-12-23 13:00:49,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:00:49,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:49,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:00:49,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:00:49,325 INFO L87 Difference]: Start difference. First operand 132 states and 330 transitions. Second operand 15 states. [2020-12-23 13:00:49,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:49,408 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-12-23 13:00:49,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:00:49,408 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-12-23 13:00:49,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:49,410 INFO L225 Difference]: With dead ends: 175 [2020-12-23 13:00:49,410 INFO L226 Difference]: Without dead ends: 172 [2020-12-23 13:00:49,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:49,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-12-23 13:00:49,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 132. [2020-12-23 13:00:49,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-12-23 13:00:49,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 330 transitions. [2020-12-23 13:00:49,415 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 330 transitions. Word has length 12 [2020-12-23 13:00:49,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:49,416 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 330 transitions. [2020-12-23 13:00:49,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:00:49,416 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 330 transitions. [2020-12-23 13:00:49,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:49,416 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:49,417 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:49,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-23 13:00:49,630 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:49,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:49,631 INFO L82 PathProgramCache]: Analyzing trace with hash 52990052, now seen corresponding path program 12 times [2020-12-23 13:00:49,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:49,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418740386] [2020-12-23 13:00:49,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:49,716 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 13:00:49,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418740386] [2020-12-23 13:00:49,717 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813503357] [2020-12-23 13:00:49,717 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 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 13:00:49,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:00:49,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:49,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:49,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:49,893 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 13:00:49,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:49,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-12-23 13:00:49,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648591896] [2020-12-23 13:00:49,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:00:49,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:49,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:00:49,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:00:49,895 INFO L87 Difference]: Start difference. First operand 132 states and 330 transitions. Second operand 15 states. [2020-12-23 13:00:49,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:49,995 INFO L93 Difference]: Finished difference Result 174 states and 413 transitions. [2020-12-23 13:00:49,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:00:49,996 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-12-23 13:00:49,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:49,998 INFO L225 Difference]: With dead ends: 174 [2020-12-23 13:00:49,998 INFO L226 Difference]: Without dead ends: 171 [2020-12-23 13:00:49,998 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:00:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-12-23 13:00:50,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 133. [2020-12-23 13:00:50,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-12-23 13:00:50,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 335 transitions. [2020-12-23 13:00:50,004 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 335 transitions. Word has length 12 [2020-12-23 13:00:50,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:50,004 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 335 transitions. [2020-12-23 13:00:50,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:00:50,004 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 335 transitions. [2020-12-23 13:00:50,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:50,005 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:50,005 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:50,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:50,219 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:50,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:50,220 INFO L82 PathProgramCache]: Analyzing trace with hash 73545842, now seen corresponding path program 13 times [2020-12-23 13:00:50,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:50,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892555009] [2020-12-23 13:00:50,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:50,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:50,314 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 13:00:50,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892555009] [2020-12-23 13:00:50,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520223998] [2020-12-23 13:00:50,314 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 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 13:00:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:50,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:50,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:50,498 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 13:00:50,498 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:50,498 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-12-23 13:00:50,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537585780] [2020-12-23 13:00:50,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:00:50,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:50,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:00:50,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:00:50,500 INFO L87 Difference]: Start difference. First operand 133 states and 335 transitions. Second operand 15 states. [2020-12-23 13:00:50,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:50,616 INFO L93 Difference]: Finished difference Result 173 states and 413 transitions. [2020-12-23 13:00:50,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:00:50,617 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-12-23 13:00:50,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:50,618 INFO L225 Difference]: With dead ends: 173 [2020-12-23 13:00:50,618 INFO L226 Difference]: Without dead ends: 170 [2020-12-23 13:00:50,619 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:00:50,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-12-23 13:00:50,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 135. [2020-12-23 13:00:50,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-23 13:00:50,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 342 transitions. [2020-12-23 13:00:50,625 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 342 transitions. Word has length 12 [2020-12-23 13:00:50,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:50,625 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 342 transitions. [2020-12-23 13:00:50,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:00:50,625 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 342 transitions. [2020-12-23 13:00:50,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:50,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:50,626 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:50,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-23 13:00:50,839 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:50,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:50,840 INFO L82 PathProgramCache]: Analyzing trace with hash 74208932, now seen corresponding path program 14 times [2020-12-23 13:00:50,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:50,841 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890137336] [2020-12-23 13:00:50,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:50,926 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 13:00:50,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890137336] [2020-12-23 13:00:50,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546621825] [2020-12-23 13:00:50,927 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 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 13:00:51,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:51,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:51,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:51,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:51,138 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 13:00:51,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:51,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-12-23 13:00:51,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268023307] [2020-12-23 13:00:51,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:00:51,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:51,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:00:51,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:00:51,140 INFO L87 Difference]: Start difference. First operand 135 states and 342 transitions. Second operand 15 states. [2020-12-23 13:00:51,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:51,282 INFO L93 Difference]: Finished difference Result 172 states and 413 transitions. [2020-12-23 13:00:51,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:00:51,282 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-12-23 13:00:51,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:51,284 INFO L225 Difference]: With dead ends: 172 [2020-12-23 13:00:51,284 INFO L226 Difference]: Without dead ends: 169 [2020-12-23 13:00:51,285 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:00:51,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-12-23 13:00:51,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 137. [2020-12-23 13:00:51,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-12-23 13:00:51,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 349 transitions. [2020-12-23 13:00:51,291 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 349 transitions. Word has length 12 [2020-12-23 13:00:51,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:51,291 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 349 transitions. [2020-12-23 13:00:51,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:00:51,292 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 349 transitions. [2020-12-23 13:00:51,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-23 13:00:51,292 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:51,292 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:51,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-23 13:00:51,502 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:51,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:51,503 INFO L82 PathProgramCache]: Analyzing trace with hash 74230322, now seen corresponding path program 15 times [2020-12-23 13:00:51,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:51,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996988936] [2020-12-23 13:00:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:51,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:51,598 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 13:00:51,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996988936] [2020-12-23 13:00:51,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314866085] [2020-12-23 13:00:51,599 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 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 13:00:51,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:00:51,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:51,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:51,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:51,813 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 13:00:51,814 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:51,814 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-12-23 13:00:51,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397027010] [2020-12-23 13:00:51,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-23 13:00:51,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:51,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-23 13:00:51,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-12-23 13:00:51,815 INFO L87 Difference]: Start difference. First operand 137 states and 349 transitions. Second operand 15 states. [2020-12-23 13:00:52,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:52,040 INFO L93 Difference]: Finished difference Result 181 states and 437 transitions. [2020-12-23 13:00:52,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:00:52,045 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-12-23 13:00:52,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:52,047 INFO L225 Difference]: With dead ends: 181 [2020-12-23 13:00:52,047 INFO L226 Difference]: Without dead ends: 175 [2020-12-23 13:00:52,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:00:52,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-12-23 13:00:52,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 135. [2020-12-23 13:00:52,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-12-23 13:00:52,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 347 transitions. [2020-12-23 13:00:52,052 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 347 transitions. Word has length 12 [2020-12-23 13:00:52,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:52,052 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 347 transitions. [2020-12-23 13:00:52,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-23 13:00:52,052 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 347 transitions. [2020-12-23 13:00:52,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:52,053 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:52,053 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:52,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-23 13:00:52,265 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:52,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:52,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1977266529, now seen corresponding path program 4 times [2020-12-23 13:00:52,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:52,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434513879] [2020-12-23 13:00:52,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:52,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:52,385 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 13:00:52,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434513879] [2020-12-23 13:00:52,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559725292] [2020-12-23 13:00:52,385 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 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 13:00:52,451 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:52,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:52,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:00:52,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:52,611 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:52,637 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 13:00:52,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:52,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:00:52,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376656765] [2020-12-23 13:00:52,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:00:52,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:52,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:00:52,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:00:52,639 INFO L87 Difference]: Start difference. First operand 135 states and 347 transitions. Second operand 18 states. [2020-12-23 13:00:52,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:52,913 INFO L93 Difference]: Finished difference Result 210 states and 508 transitions. [2020-12-23 13:00:52,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:00:52,913 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-12-23 13:00:52,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:52,915 INFO L225 Difference]: With dead ends: 210 [2020-12-23 13:00:52,915 INFO L226 Difference]: Without dead ends: 202 [2020-12-23 13:00:52,915 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 13:00:52,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-12-23 13:00:52,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 145. [2020-12-23 13:00:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-12-23 13:00:52,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 379 transitions. [2020-12-23 13:00:52,921 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 379 transitions. Word has length 13 [2020-12-23 13:00:52,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:52,921 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 379 transitions. [2020-12-23 13:00:52,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:00:52,921 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 379 transitions. [2020-12-23 13:00:52,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:52,922 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:52,922 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:53,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-12-23 13:00:53,137 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:53,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:53,138 INFO L82 PathProgramCache]: Analyzing trace with hash 1447090257, now seen corresponding path program 22 times [2020-12-23 13:00:53,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:53,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845620742] [2020-12-23 13:00:53,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:53,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:53,225 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 13:00:53,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845620742] [2020-12-23 13:00:53,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368453108] [2020-12-23 13:00:53,226 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 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 13:00:53,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:53,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:53,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:53,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:53,457 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 13:00:53,458 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:53,458 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:53,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656157575] [2020-12-23 13:00:53,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:53,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:53,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:53,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:53,459 INFO L87 Difference]: Start difference. First operand 145 states and 379 transitions. Second operand 16 states. [2020-12-23 13:00:53,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:53,599 INFO L93 Difference]: Finished difference Result 179 states and 445 transitions. [2020-12-23 13:00:53,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:00:53,600 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:53,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:53,601 INFO L225 Difference]: With dead ends: 179 [2020-12-23 13:00:53,601 INFO L226 Difference]: Without dead ends: 177 [2020-12-23 13:00:53,602 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 13:00:53,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-12-23 13:00:53,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 150. [2020-12-23 13:00:53,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 13:00:53,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 388 transitions. [2020-12-23 13:00:53,606 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 388 transitions. Word has length 13 [2020-12-23 13:00:53,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:53,607 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 388 transitions. [2020-12-23 13:00:53,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:53,607 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 388 transitions. [2020-12-23 13:00:53,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:53,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:53,608 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:53,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:53,824 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:53,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:53,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1447371117, now seen corresponding path program 23 times [2020-12-23 13:00:53,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:53,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178746195] [2020-12-23 13:00:53,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:53,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:53,913 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 13:00:53,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178746195] [2020-12-23 13:00:53,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571076976] [2020-12-23 13:00:53,913 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 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 13:00:53,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:00:53,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:53,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:53,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:54,104 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:00:54,106 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:00:54,108 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:54,129 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 13:00:54,130 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:54,130 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:54,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365575386] [2020-12-23 13:00:54,130 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:54,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:54,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:54,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:54,131 INFO L87 Difference]: Start difference. First operand 150 states and 388 transitions. Second operand 16 states. [2020-12-23 13:00:54,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:54,565 INFO L93 Difference]: Finished difference Result 244 states and 588 transitions. [2020-12-23 13:00:54,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:00:54,565 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:54,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:54,567 INFO L225 Difference]: With dead ends: 244 [2020-12-23 13:00:54,568 INFO L226 Difference]: Without dead ends: 232 [2020-12-23 13:00:54,568 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 13:00:54,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-12-23 13:00:54,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 144. [2020-12-23 13:00:54,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-23 13:00:54,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 383 transitions. [2020-12-23 13:00:54,574 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 383 transitions. Word has length 13 [2020-12-23 13:00:54,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:54,574 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 383 transitions. [2020-12-23 13:00:54,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:54,574 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 383 transitions. [2020-12-23 13:00:54,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:54,575 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:54,575 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:54,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-23 13:00:54,789 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:54,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:54,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1985942897, now seen corresponding path program 24 times [2020-12-23 13:00:54,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:54,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793996555] [2020-12-23 13:00:54,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:54,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:54,883 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 13:00:54,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793996555] [2020-12-23 13:00:54,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660611044] [2020-12-23 13:00:54,884 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 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 13:00:54,955 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:00:54,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:54,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:54,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:55,139 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 13:00:55,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:55,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:55,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453408577] [2020-12-23 13:00:55,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:55,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:55,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:55,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:55,141 INFO L87 Difference]: Start difference. First operand 144 states and 383 transitions. Second operand 16 states. [2020-12-23 13:00:55,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:55,430 INFO L93 Difference]: Finished difference Result 202 states and 495 transitions. [2020-12-23 13:00:55,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:00:55,431 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:55,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:55,432 INFO L225 Difference]: With dead ends: 202 [2020-12-23 13:00:55,432 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 13:00:55,433 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:00:55,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 13:00:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 148. [2020-12-23 13:00:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-12-23 13:00:55,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 389 transitions. [2020-12-23 13:00:55,438 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 389 transitions. Word has length 13 [2020-12-23 13:00:55,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:55,439 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 389 transitions. [2020-12-23 13:00:55,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:55,439 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 389 transitions. [2020-12-23 13:00:55,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:55,440 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:55,440 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:55,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-23 13:00:55,655 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:55,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:55,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1716036437, now seen corresponding path program 25 times [2020-12-23 13:00:55,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:55,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913275366] [2020-12-23 13:00:55,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:55,746 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 13:00:55,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913275366] [2020-12-23 13:00:55,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131442843] [2020-12-23 13:00:55,747 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 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 13:00:55,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:55,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:55,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:56,018 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 13:00:56,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:56,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:56,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39972569] [2020-12-23 13:00:56,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:56,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:56,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:56,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:56,020 INFO L87 Difference]: Start difference. First operand 148 states and 389 transitions. Second operand 16 states. [2020-12-23 13:00:56,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:56,398 INFO L93 Difference]: Finished difference Result 217 states and 522 transitions. [2020-12-23 13:00:56,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:00:56,398 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:56,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:56,401 INFO L225 Difference]: With dead ends: 217 [2020-12-23 13:00:56,401 INFO L226 Difference]: Without dead ends: 215 [2020-12-23 13:00:56,402 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 13:00:56,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-23 13:00:56,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 150. [2020-12-23 13:00:56,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 13:00:56,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 396 transitions. [2020-12-23 13:00:56,406 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 396 transitions. Word has length 13 [2020-12-23 13:00:56,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:56,407 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 396 transitions. [2020-12-23 13:00:56,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:56,407 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 396 transitions. [2020-12-23 13:00:56,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:56,407 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:56,408 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:56,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:56,623 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:56,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:56,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1715431007, now seen corresponding path program 26 times [2020-12-23 13:00:56,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:56,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146730363] [2020-12-23 13:00:56,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:56,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:56,704 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 13:00:56,705 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146730363] [2020-12-23 13:00:56,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295174619] [2020-12-23 13:00:56,706 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 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 13:00:56,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:00:56,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:56,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:56,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:56,966 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 13:00:56,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:56,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:56,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776606534] [2020-12-23 13:00:56,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:56,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:56,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:56,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:56,968 INFO L87 Difference]: Start difference. First operand 150 states and 396 transitions. Second operand 16 states. [2020-12-23 13:00:57,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:57,387 INFO L93 Difference]: Finished difference Result 215 states and 525 transitions. [2020-12-23 13:00:57,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:00:57,387 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:57,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:57,388 INFO L225 Difference]: With dead ends: 215 [2020-12-23 13:00:57,389 INFO L226 Difference]: Without dead ends: 213 [2020-12-23 13:00:57,389 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 13:00:57,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-23 13:00:57,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 152. [2020-12-23 13:00:57,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 13:00:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 403 transitions. [2020-12-23 13:00:57,394 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 403 transitions. Word has length 13 [2020-12-23 13:00:57,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:57,395 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 403 transitions. [2020-12-23 13:00:57,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:57,395 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 403 transitions. [2020-12-23 13:00:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:57,395 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:57,396 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:57,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-23 13:00:57,609 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:57,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:57,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1715411539, now seen corresponding path program 27 times [2020-12-23 13:00:57,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:57,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753386712] [2020-12-23 13:00:57,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:57,727 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 13:00:57,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753386712] [2020-12-23 13:00:57,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42510780] [2020-12-23 13:00:57,727 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 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 13:00:57,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:00:57,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:57,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:57,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:57,940 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:57,944 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:00:57,945 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:00:57,967 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 13:00:57,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:57,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:57,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174712021] [2020-12-23 13:00:57,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:57,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:57,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:57,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:57,969 INFO L87 Difference]: Start difference. First operand 152 states and 403 transitions. Second operand 16 states. [2020-12-23 13:00:58,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:58,645 INFO L93 Difference]: Finished difference Result 253 states and 611 transitions. [2020-12-23 13:00:58,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:00:58,645 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:58,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:58,647 INFO L225 Difference]: With dead ends: 253 [2020-12-23 13:00:58,647 INFO L226 Difference]: Without dead ends: 241 [2020-12-23 13:00:58,648 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 13:00:58,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-23 13:00:58,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 144. [2020-12-23 13:00:58,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-12-23 13:00:58,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 383 transitions. [2020-12-23 13:00:58,653 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 383 transitions. Word has length 13 [2020-12-23 13:00:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:58,653 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 383 transitions. [2020-12-23 13:00:58,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:58,654 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 383 transitions. [2020-12-23 13:00:58,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:58,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:58,654 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:58,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:00:58,869 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:58,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:58,870 INFO L82 PathProgramCache]: Analyzing trace with hash 2021527201, now seen corresponding path program 28 times [2020-12-23 13:00:58,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:58,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [445623362] [2020-12-23 13:00:58,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:58,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:58,963 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 13:00:58,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [445623362] [2020-12-23 13:00:58,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595760852] [2020-12-23 13:00:58,963 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 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 13:00:59,029 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:00:59,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:59,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:59,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:00:59,172 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 13:00:59,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:00:59,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:00:59,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882407607] [2020-12-23 13:00:59,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:00:59,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:00:59,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:00:59,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:00:59,174 INFO L87 Difference]: Start difference. First operand 144 states and 383 transitions. Second operand 16 states. [2020-12-23 13:00:59,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:00:59,468 INFO L93 Difference]: Finished difference Result 209 states and 510 transitions. [2020-12-23 13:00:59,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:00:59,469 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:00:59,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:00:59,471 INFO L225 Difference]: With dead ends: 209 [2020-12-23 13:00:59,471 INFO L226 Difference]: Without dead ends: 207 [2020-12-23 13:00:59,471 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 13:00:59,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-12-23 13:00:59,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 150. [2020-12-23 13:00:59,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 13:00:59,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 393 transitions. [2020-12-23 13:00:59,477 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 393 transitions. Word has length 13 [2020-12-23 13:00:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:00:59,478 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 393 transitions. [2020-12-23 13:00:59,478 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:00:59,478 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 393 transitions. [2020-12-23 13:00:59,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:00:59,479 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:00:59,479 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:00:59,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-12-23 13:00:59,693 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:00:59,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:00:59,694 INFO L82 PathProgramCache]: Analyzing trace with hash 2021584861, now seen corresponding path program 29 times [2020-12-23 13:00:59,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:00:59,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958805811] [2020-12-23 13:00:59,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:00:59,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:00:59,793 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 13:00:59,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958805811] [2020-12-23 13:00:59,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162782333] [2020-12-23 13:00:59,794 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 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 13:00:59,856 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:00:59,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:00:59,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:00:59,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:00,022 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 13:01:00,022 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:00,022 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:00,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436882943] [2020-12-23 13:01:00,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:00,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:00,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:00,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:00,024 INFO L87 Difference]: Start difference. First operand 150 states and 393 transitions. Second operand 16 states. [2020-12-23 13:01:00,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:00,332 INFO L93 Difference]: Finished difference Result 202 states and 497 transitions. [2020-12-23 13:01:00,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:01:00,333 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:00,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:00,334 INFO L225 Difference]: With dead ends: 202 [2020-12-23 13:01:00,335 INFO L226 Difference]: Without dead ends: 200 [2020-12-23 13:01:00,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:01:00,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-12-23 13:01:00,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2020-12-23 13:01:00,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-12-23 13:01:00,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 393 transitions. [2020-12-23 13:01:00,341 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 393 transitions. Word has length 13 [2020-12-23 13:01:00,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:00,341 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 393 transitions. [2020-12-23 13:01:00,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:00,341 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 393 transitions. [2020-12-23 13:01:00,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:00,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:00,342 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:00,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-23 13:01:00,556 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:00,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:00,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1798692869, now seen corresponding path program 30 times [2020-12-23 13:01:00,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:00,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568389672] [2020-12-23 13:01:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:00,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:00,642 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 13:01:00,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568389672] [2020-12-23 13:01:00,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932044229] [2020-12-23 13:01:00,643 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 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 13:01:00,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:01:00,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:00,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:00,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:00,846 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 13:01:00,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:00,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:00,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644308600] [2020-12-23 13:01:00,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:00,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:00,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:00,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:00,847 INFO L87 Difference]: Start difference. First operand 150 states and 393 transitions. Second operand 16 states. [2020-12-23 13:01:01,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:01,136 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-12-23 13:01:01,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:01,137 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:01,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:01,139 INFO L225 Difference]: With dead ends: 223 [2020-12-23 13:01:01,139 INFO L226 Difference]: Without dead ends: 221 [2020-12-23 13:01:01,143 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 13:01:01,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-23 13:01:01,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 153. [2020-12-23 13:01:01,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-12-23 13:01:01,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 403 transitions. [2020-12-23 13:01:01,148 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 403 transitions. Word has length 13 [2020-12-23 13:01:01,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:01,149 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 403 transitions. [2020-12-23 13:01:01,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:01,149 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 403 transitions. [2020-12-23 13:01:01,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:01,149 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:01,149 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:01,362 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-23 13:01:01,363 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:01,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:01,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1798750529, now seen corresponding path program 31 times [2020-12-23 13:01:01,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:01,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476669204] [2020-12-23 13:01:01,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:01,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:01,446 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 13:01:01,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476669204] [2020-12-23 13:01:01,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [201469800] [2020-12-23 13:01:01,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:01:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:01,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:01,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:01,663 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 13:01:01,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:01,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:01,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959201397] [2020-12-23 13:01:01,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:01,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:01,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:01,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:01,665 INFO L87 Difference]: Start difference. First operand 153 states and 403 transitions. Second operand 16 states. [2020-12-23 13:01:01,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:01,998 INFO L93 Difference]: Finished difference Result 214 states and 523 transitions. [2020-12-23 13:01:01,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:01,999 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:01,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:02,000 INFO L225 Difference]: With dead ends: 214 [2020-12-23 13:01:02,001 INFO L226 Difference]: Without dead ends: 212 [2020-12-23 13:01:02,001 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 13:01:02,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-23 13:01:02,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 152. [2020-12-23 13:01:02,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 13:01:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 400 transitions. [2020-12-23 13:01:02,006 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 400 transitions. Word has length 13 [2020-12-23 13:01:02,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:02,006 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 400 transitions. [2020-12-23 13:01:02,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:02,007 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 400 transitions. [2020-12-23 13:01:02,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:02,007 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:02,007 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:02,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-12-23 13:01:02,220 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:02,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:02,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1817461199, now seen corresponding path program 32 times [2020-12-23 13:01:02,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:02,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829961268] [2020-12-23 13:01:02,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:02,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:02,321 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 13:01:02,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829961268] [2020-12-23 13:01:02,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430948386] [2020-12-23 13:01:02,322 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 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 13:01:02,408 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:02,408 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:02,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:01:02,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:02,547 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 13:01:02,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:02,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:02,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315908244] [2020-12-23 13:01:02,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:02,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:02,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:02,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:02,549 INFO L87 Difference]: Start difference. First operand 152 states and 400 transitions. Second operand 16 states. [2020-12-23 13:01:02,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:02,962 INFO L93 Difference]: Finished difference Result 223 states and 537 transitions. [2020-12-23 13:01:02,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:02,963 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:02,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:02,964 INFO L225 Difference]: With dead ends: 223 [2020-12-23 13:01:02,964 INFO L226 Difference]: Without dead ends: 221 [2020-12-23 13:01:02,964 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 13:01:02,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-12-23 13:01:02,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 155. [2020-12-23 13:01:02,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 13:01:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 412 transitions. [2020-12-23 13:01:02,968 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 412 transitions. Word has length 13 [2020-12-23 13:01:02,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:02,969 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 412 transitions. [2020-12-23 13:01:02,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:02,969 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 412 transitions. [2020-12-23 13:01:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:02,970 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:02,970 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:03,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:03,178 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:03,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:03,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1818124289, now seen corresponding path program 33 times [2020-12-23 13:01:03,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:03,179 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753272211] [2020-12-23 13:01:03,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:03,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:03,265 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 13:01:03,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753272211] [2020-12-23 13:01:03,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452546620] [2020-12-23 13:01:03,266 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 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 13:01:03,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:01:03,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:03,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:03,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:03,470 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 13:01:03,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:03,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:03,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885574658] [2020-12-23 13:01:03,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:03,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:03,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:03,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:03,472 INFO L87 Difference]: Start difference. First operand 155 states and 412 transitions. Second operand 16 states. [2020-12-23 13:01:03,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:03,996 INFO L93 Difference]: Finished difference Result 225 states and 549 transitions. [2020-12-23 13:01:03,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:03,997 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:03,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:03,998 INFO L225 Difference]: With dead ends: 225 [2020-12-23 13:01:03,999 INFO L226 Difference]: Without dead ends: 223 [2020-12-23 13:01:03,999 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 13:01:04,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-23 13:01:04,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 157. [2020-12-23 13:01:04,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 13:01:04,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 419 transitions. [2020-12-23 13:01:04,004 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 419 transitions. Word has length 13 [2020-12-23 13:01:04,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:04,005 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 419 transitions. [2020-12-23 13:01:04,005 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:04,005 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 419 transitions. [2020-12-23 13:01:04,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:04,006 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:04,006 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:04,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2020-12-23 13:01:04,221 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:04,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:04,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1818143757, now seen corresponding path program 34 times [2020-12-23 13:01:04,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:04,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271032147] [2020-12-23 13:01:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:04,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:04,321 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 13:01:04,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271032147] [2020-12-23 13:01:04,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849045747] [2020-12-23 13:01:04,321 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 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 13:01:04,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:04,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:04,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:04,391 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:04,502 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:04,519 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 13:01:04,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:04,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:04,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16257572] [2020-12-23 13:01:04,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:04,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:04,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:04,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=170, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:04,522 INFO L87 Difference]: Start difference. First operand 157 states and 419 transitions. Second operand 16 states. [2020-12-23 13:01:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:05,230 INFO L93 Difference]: Finished difference Result 272 states and 658 transitions. [2020-12-23 13:01:05,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:01:05,230 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:05,232 INFO L225 Difference]: With dead ends: 272 [2020-12-23 13:01:05,232 INFO L226 Difference]: Without dead ends: 260 [2020-12-23 13:01:05,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:01:05,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-23 13:01:05,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 152. [2020-12-23 13:01:05,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-12-23 13:01:05,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 404 transitions. [2020-12-23 13:01:05,238 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 404 transitions. Word has length 13 [2020-12-23 13:01:05,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:05,238 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 404 transitions. [2020-12-23 13:01:05,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 404 transitions. [2020-12-23 13:01:05,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:05,239 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:05,239 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:05,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:05,453 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:05,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:05,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1698987151, now seen corresponding path program 35 times [2020-12-23 13:01:05,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:05,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510092856] [2020-12-23 13:01:05,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:05,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:05,534 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 13:01:05,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510092856] [2020-12-23 13:01:05,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748285450] [2020-12-23 13:01:05,535 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 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 13:01:05,599 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:05,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:05,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:05,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:05,733 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 13:01:05,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:05,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:05,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943481551] [2020-12-23 13:01:05,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:05,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:05,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:05,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:05,735 INFO L87 Difference]: Start difference. First operand 152 states and 404 transitions. Second operand 16 states. [2020-12-23 13:01:05,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:05,912 INFO L93 Difference]: Finished difference Result 199 states and 502 transitions. [2020-12-23 13:01:05,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:01:05,913 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:05,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:05,914 INFO L225 Difference]: With dead ends: 199 [2020-12-23 13:01:05,914 INFO L226 Difference]: Without dead ends: 197 [2020-12-23 13:01:05,915 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 13:01:05,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-12-23 13:01:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 155. [2020-12-23 13:01:05,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 13:01:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 412 transitions. [2020-12-23 13:01:05,919 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 412 transitions. Word has length 13 [2020-12-23 13:01:05,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:05,919 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 412 transitions. [2020-12-23 13:01:05,920 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:05,920 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 412 transitions. [2020-12-23 13:01:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:05,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:05,920 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:06,132 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-23 13:01:06,133 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:06,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:06,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1698989073, now seen corresponding path program 36 times [2020-12-23 13:01:06,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:06,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701454569] [2020-12-23 13:01:06,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:06,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:06,217 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 13:01:06,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701454569] [2020-12-23 13:01:06,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [688616537] [2020-12-23 13:01:06,218 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 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 13:01:06,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:06,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:06,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:06,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:06,454 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 13:01:06,455 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:06,455 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:06,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994017267] [2020-12-23 13:01:06,456 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:06,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:06,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:06,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:06,457 INFO L87 Difference]: Start difference. First operand 155 states and 412 transitions. Second operand 16 states. [2020-12-23 13:01:06,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:06,717 INFO L93 Difference]: Finished difference Result 208 states and 520 transitions. [2020-12-23 13:01:06,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:01:06,717 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:06,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:06,720 INFO L225 Difference]: With dead ends: 208 [2020-12-23 13:01:06,720 INFO L226 Difference]: Without dead ends: 206 [2020-12-23 13:01:06,720 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 13:01:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-12-23 13:01:06,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 157. [2020-12-23 13:01:06,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 13:01:06,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 417 transitions. [2020-12-23 13:01:06,725 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 417 transitions. Word has length 13 [2020-12-23 13:01:06,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:06,726 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 417 transitions. [2020-12-23 13:01:06,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:06,726 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 417 transitions. [2020-12-23 13:01:06,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:06,726 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:06,727 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:06,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-23 13:01:06,941 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:06,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:06,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1700893775, now seen corresponding path program 37 times [2020-12-23 13:01:06,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:06,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705578486] [2020-12-23 13:01:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:06,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:07,028 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 13:01:07,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705578486] [2020-12-23 13:01:07,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507686209] [2020-12-23 13:01:07,028 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 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 13:01:07,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:07,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:07,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:07,254 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:07,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:07,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:07,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051010436] [2020-12-23 13:01:07,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:07,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:07,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:07,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:07,256 INFO L87 Difference]: Start difference. First operand 157 states and 417 transitions. Second operand 16 states. [2020-12-23 13:01:07,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:07,433 INFO L93 Difference]: Finished difference Result 198 states and 501 transitions. [2020-12-23 13:01:07,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:01:07,433 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:07,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:07,435 INFO L225 Difference]: With dead ends: 198 [2020-12-23 13:01:07,435 INFO L226 Difference]: Without dead ends: 196 [2020-12-23 13:01:07,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:01:07,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-12-23 13:01:07,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 157. [2020-12-23 13:01:07,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 13:01:07,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 416 transitions. [2020-12-23 13:01:07,441 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 416 transitions. Word has length 13 [2020-12-23 13:01:07,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:07,441 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 416 transitions. [2020-12-23 13:01:07,441 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:07,442 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 416 transitions. [2020-12-23 13:01:07,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:07,442 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:07,443 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:07,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:07,655 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:07,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:07,656 INFO L82 PathProgramCache]: Analyzing trace with hash -913909845, now seen corresponding path program 38 times [2020-12-23 13:01:07,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:07,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887420573] [2020-12-23 13:01:07,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:07,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:07,747 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 13:01:07,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887420573] [2020-12-23 13:01:07,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170367941] [2020-12-23 13:01:07,747 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 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 13:01:07,808 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:07,809 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:07,810 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:07,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:07,935 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 13:01:07,936 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:07,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:07,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106880630] [2020-12-23 13:01:07,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:07,937 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:07,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:07,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:07,937 INFO L87 Difference]: Start difference. First operand 157 states and 416 transitions. Second operand 16 states. [2020-12-23 13:01:08,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:08,173 INFO L93 Difference]: Finished difference Result 214 states and 530 transitions. [2020-12-23 13:01:08,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:01:08,174 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:08,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:08,176 INFO L225 Difference]: With dead ends: 214 [2020-12-23 13:01:08,176 INFO L226 Difference]: Without dead ends: 212 [2020-12-23 13:01:08,176 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2020-12-23 13:01:08,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-12-23 13:01:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 158. [2020-12-23 13:01:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-23 13:01:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 419 transitions. [2020-12-23 13:01:08,182 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 419 transitions. Word has length 13 [2020-12-23 13:01:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:08,182 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 419 transitions. [2020-12-23 13:01:08,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:08,182 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 419 transitions. [2020-12-23 13:01:08,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:08,183 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:08,183 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:08,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-23 13:01:08,397 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:08,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:08,398 INFO L82 PathProgramCache]: Analyzing trace with hash -913907923, now seen corresponding path program 39 times [2020-12-23 13:01:08,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:08,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931730072] [2020-12-23 13:01:08,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:08,498 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 13:01:08,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931730072] [2020-12-23 13:01:08,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1178062417] [2020-12-23 13:01:08,498 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 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 13:01:08,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:08,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:08,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:08,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:08,723 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 13:01:08,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:08,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:08,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453647653] [2020-12-23 13:01:08,724 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:08,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:08,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:08,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=178, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:08,725 INFO L87 Difference]: Start difference. First operand 158 states and 419 transitions. Second operand 16 states. [2020-12-23 13:01:09,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:09,061 INFO L93 Difference]: Finished difference Result 225 states and 552 transitions. [2020-12-23 13:01:09,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:01:09,061 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:09,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:09,063 INFO L225 Difference]: With dead ends: 225 [2020-12-23 13:01:09,063 INFO L226 Difference]: Without dead ends: 223 [2020-12-23 13:01:09,064 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 13:01:09,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-12-23 13:01:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 159. [2020-12-23 13:01:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-12-23 13:01:09,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 421 transitions. [2020-12-23 13:01:09,068 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 421 transitions. Word has length 13 [2020-12-23 13:01:09,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:09,068 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 421 transitions. [2020-12-23 13:01:09,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:09,068 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 421 transitions. [2020-12-23 13:01:09,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:09,069 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:09,069 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:09,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-23 13:01:09,273 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:09,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:09,275 INFO L82 PathProgramCache]: Analyzing trace with hash -912003221, now seen corresponding path program 40 times [2020-12-23 13:01:09,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:09,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832145346] [2020-12-23 13:01:09,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:09,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:09,360 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 13:01:09,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832145346] [2020-12-23 13:01:09,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360298104] [2020-12-23 13:01:09,362 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 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 13:01:09,438 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:09,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:09,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:09,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:09,587 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 13:01:09,588 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:09,588 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:09,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364253376] [2020-12-23 13:01:09,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:09,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:09,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:09,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:09,589 INFO L87 Difference]: Start difference. First operand 159 states and 421 transitions. Second operand 16 states. [2020-12-23 13:01:09,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:09,807 INFO L93 Difference]: Finished difference Result 210 states and 522 transitions. [2020-12-23 13:01:09,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:01:09,808 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:09,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:09,809 INFO L225 Difference]: With dead ends: 210 [2020-12-23 13:01:09,809 INFO L226 Difference]: Without dead ends: 208 [2020-12-23 13:01:09,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:01:09,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-23 13:01:09,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-12-23 13:01:09,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-12-23 13:01:09,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 411 transitions. [2020-12-23 13:01:09,813 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 411 transitions. Word has length 13 [2020-12-23 13:01:09,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:09,814 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 411 transitions. [2020-12-23 13:01:09,814 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:09,814 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 411 transitions. [2020-12-23 13:01:09,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:09,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:09,815 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:10,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-23 13:01:10,028 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:10,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:10,028 INFO L82 PathProgramCache]: Analyzing trace with hash -332091615, now seen corresponding path program 41 times [2020-12-23 13:01:10,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:10,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65632976] [2020-12-23 13:01:10,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:10,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:10,106 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 13:01:10,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65632976] [2020-12-23 13:01:10,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [744435790] [2020-12-23 13:01:10,107 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 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 13:01:10,165 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:10,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:10,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:10,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:10,326 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 13:01:10,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:10,326 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:10,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137806289] [2020-12-23 13:01:10,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:10,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:10,328 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:10,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:10,328 INFO L87 Difference]: Start difference. First operand 155 states and 411 transitions. Second operand 16 states. [2020-12-23 13:01:10,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:10,600 INFO L93 Difference]: Finished difference Result 215 states and 533 transitions. [2020-12-23 13:01:10,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:01:10,601 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:10,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:10,603 INFO L225 Difference]: With dead ends: 215 [2020-12-23 13:01:10,603 INFO L226 Difference]: Without dead ends: 213 [2020-12-23 13:01:10,603 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 13:01:10,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-12-23 13:01:10,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 157. [2020-12-23 13:01:10,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 13:01:10,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 419 transitions. [2020-12-23 13:01:10,607 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 419 transitions. Word has length 13 [2020-12-23 13:01:10,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:10,607 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 419 transitions. [2020-12-23 13:01:10,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:10,608 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 419 transitions. [2020-12-23 13:01:10,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:10,608 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:10,608 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:10,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:10,811 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:10,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:10,812 INFO L82 PathProgramCache]: Analyzing trace with hash -332089693, now seen corresponding path program 42 times [2020-12-23 13:01:10,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:10,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2496877] [2020-12-23 13:01:10,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:10,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:10,894 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 13:01:10,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2496877] [2020-12-23 13:01:10,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852590718] [2020-12-23 13:01:10,894 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 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 13:01:10,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:10,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:10,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:10,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:11,149 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 13:01:11,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:11,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:11,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323303414] [2020-12-23 13:01:11,150 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:11,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:11,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:11,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:11,151 INFO L87 Difference]: Start difference. First operand 157 states and 419 transitions. Second operand 16 states. [2020-12-23 13:01:11,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:11,493 INFO L93 Difference]: Finished difference Result 231 states and 562 transitions. [2020-12-23 13:01:11,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:11,494 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:11,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:11,495 INFO L225 Difference]: With dead ends: 231 [2020-12-23 13:01:11,495 INFO L226 Difference]: Without dead ends: 229 [2020-12-23 13:01:11,496 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 13:01:11,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-12-23 13:01:11,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 157. [2020-12-23 13:01:11,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-12-23 13:01:11,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 418 transitions. [2020-12-23 13:01:11,501 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 418 transitions. Word has length 13 [2020-12-23 13:01:11,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:11,501 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 418 transitions. [2020-12-23 13:01:11,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:11,501 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 418 transitions. [2020-12-23 13:01:11,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:11,502 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:11,502 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:11,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:11,716 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:11,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:11,716 INFO L82 PathProgramCache]: Analyzing trace with hash -313323285, now seen corresponding path program 43 times [2020-12-23 13:01:11,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:11,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913974898] [2020-12-23 13:01:11,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:11,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:11,793 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 13:01:11,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913974898] [2020-12-23 13:01:11,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884081051] [2020-12-23 13:01:11,794 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 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 13:01:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:11,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:11,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:12,020 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 13:01:12,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:12,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:12,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247186092] [2020-12-23 13:01:12,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:12,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:12,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:12,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:12,022 INFO L87 Difference]: Start difference. First operand 157 states and 418 transitions. Second operand 16 states. [2020-12-23 13:01:12,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:12,327 INFO L93 Difference]: Finished difference Result 224 states and 550 transitions. [2020-12-23 13:01:12,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:01:12,328 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:12,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:12,330 INFO L225 Difference]: With dead ends: 224 [2020-12-23 13:01:12,330 INFO L226 Difference]: Without dead ends: 222 [2020-12-23 13:01:12,330 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 13:01:12,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-12-23 13:01:12,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 158. [2020-12-23 13:01:12,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-12-23 13:01:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 423 transitions. [2020-12-23 13:01:12,334 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 423 transitions. Word has length 13 [2020-12-23 13:01:12,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:12,334 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 423 transitions. [2020-12-23 13:01:12,334 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:12,334 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 423 transitions. [2020-12-23 13:01:12,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:12,335 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:12,335 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:12,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:12,549 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:12,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:12,549 INFO L82 PathProgramCache]: Analyzing trace with hash -313321363, now seen corresponding path program 44 times [2020-12-23 13:01:12,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:12,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052828348] [2020-12-23 13:01:12,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:12,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:12,639 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 13:01:12,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052828348] [2020-12-23 13:01:12,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391770255] [2020-12-23 13:01:12,640 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 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 13:01:12,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:12,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:12,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:12,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:12,875 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 13:01:12,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:12,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:12,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074820410] [2020-12-23 13:01:12,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:12,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:12,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:12,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:12,877 INFO L87 Difference]: Start difference. First operand 158 states and 423 transitions. Second operand 16 states. [2020-12-23 13:01:13,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:13,364 INFO L93 Difference]: Finished difference Result 235 states and 573 transitions. [2020-12-23 13:01:13,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:01:13,365 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:13,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:13,367 INFO L225 Difference]: With dead ends: 235 [2020-12-23 13:01:13,367 INFO L226 Difference]: Without dead ends: 233 [2020-12-23 13:01:13,368 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 13:01:13,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-12-23 13:01:13,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 160. [2020-12-23 13:01:13,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-12-23 13:01:13,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 430 transitions. [2020-12-23 13:01:13,373 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 430 transitions. Word has length 13 [2020-12-23 13:01:13,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:13,373 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 430 transitions. [2020-12-23 13:01:13,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:13,373 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 430 transitions. [2020-12-23 13:01:13,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:13,374 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:13,374 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:13,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:13,589 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:13,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:13,589 INFO L82 PathProgramCache]: Analyzing trace with hash -312717855, now seen corresponding path program 45 times [2020-12-23 13:01:13,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:13,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915102610] [2020-12-23 13:01:13,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:13,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:13,677 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 13:01:13,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915102610] [2020-12-23 13:01:13,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419052820] [2020-12-23 13:01:13,678 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 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 13:01:13,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:13,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:13,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:13,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:13,891 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 13:01:13,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:13,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:13,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493957084] [2020-12-23 13:01:13,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:13,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:13,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:13,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:13,893 INFO L87 Difference]: Start difference. First operand 160 states and 430 transitions. Second operand 16 states. [2020-12-23 13:01:14,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:14,264 INFO L93 Difference]: Finished difference Result 217 states and 535 transitions. [2020-12-23 13:01:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:14,264 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:14,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:14,266 INFO L225 Difference]: With dead ends: 217 [2020-12-23 13:01:14,266 INFO L226 Difference]: Without dead ends: 215 [2020-12-23 13:01:14,266 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 13:01:14,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-12-23 13:01:14,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 162. [2020-12-23 13:01:14,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 13:01:14,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 437 transitions. [2020-12-23 13:01:14,270 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 437 transitions. Word has length 13 [2020-12-23 13:01:14,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:14,270 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 437 transitions. [2020-12-23 13:01:14,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:14,270 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 437 transitions. [2020-12-23 13:01:14,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:14,271 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:14,271 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:14,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-12-23 13:01:14,485 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:14,485 INFO L82 PathProgramCache]: Analyzing trace with hash -312698387, now seen corresponding path program 46 times [2020-12-23 13:01:14,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:14,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051090305] [2020-12-23 13:01:14,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:14,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:14,580 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 13:01:14,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051090305] [2020-12-23 13:01:14,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1334525857] [2020-12-23 13:01:14,581 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 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 13:01:14,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:14,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:14,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:14,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:14,761 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:14,785 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 13:01:14,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:14,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:14,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275097217] [2020-12-23 13:01:14,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:14,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:14,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:14,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:14,787 INFO L87 Difference]: Start difference. First operand 162 states and 437 transitions. Second operand 16 states. [2020-12-23 13:01:15,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:15,305 INFO L93 Difference]: Finished difference Result 256 states and 619 transitions. [2020-12-23 13:01:15,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:15,305 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:15,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:15,307 INFO L225 Difference]: With dead ends: 256 [2020-12-23 13:01:15,307 INFO L226 Difference]: Without dead ends: 244 [2020-12-23 13:01:15,308 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 13:01:15,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-23 13:01:15,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-12-23 13:01:15,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 13:01:15,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 434 transitions. [2020-12-23 13:01:15,312 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 434 transitions. Word has length 13 [2020-12-23 13:01:15,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:15,312 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 434 transitions. [2020-12-23 13:01:15,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 434 transitions. [2020-12-23 13:01:15,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:15,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:15,313 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:15,525 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:15,526 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:15,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:15,527 INFO L82 PathProgramCache]: Analyzing trace with hash -312658273, now seen corresponding path program 47 times [2020-12-23 13:01:15,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:15,527 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116394104] [2020-12-23 13:01:15,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:15,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:15,613 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 13:01:15,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116394104] [2020-12-23 13:01:15,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308487029] [2020-12-23 13:01:15,614 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 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 13:01:15,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:15,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:15,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:15,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:15,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:15,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:15,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:15,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434593123] [2020-12-23 13:01:15,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:15,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:15,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:15,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:15,880 INFO L87 Difference]: Start difference. First operand 162 states and 434 transitions. Second operand 16 states. [2020-12-23 13:01:16,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:16,380 INFO L93 Difference]: Finished difference Result 242 states and 591 transitions. [2020-12-23 13:01:16,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:16,381 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:16,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:16,384 INFO L225 Difference]: With dead ends: 242 [2020-12-23 13:01:16,384 INFO L226 Difference]: Without dead ends: 240 [2020-12-23 13:01:16,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=263, Invalid=607, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:01:16,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-12-23 13:01:16,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 164. [2020-12-23 13:01:16,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 13:01:16,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 441 transitions. [2020-12-23 13:01:16,389 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 441 transitions. Word has length 13 [2020-12-23 13:01:16,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:16,389 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 441 transitions. [2020-12-23 13:01:16,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:16,389 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 441 transitions. [2020-12-23 13:01:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:16,390 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:16,390 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:16,603 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-12-23 13:01:16,604 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:16,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:16,604 INFO L82 PathProgramCache]: Analyzing trace with hash -312638805, now seen corresponding path program 48 times [2020-12-23 13:01:16,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:16,605 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795104688] [2020-12-23 13:01:16,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:16,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:16,698 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 13:01:16,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795104688] [2020-12-23 13:01:16,699 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934999114] [2020-12-23 13:01:16,699 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 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 13:01:16,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:16,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:16,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:16,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:16,910 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:16,912 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:16,914 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:16,941 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 13:01:16,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:16,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:16,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983789682] [2020-12-23 13:01:16,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:16,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:16,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:16,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:16,943 INFO L87 Difference]: Start difference. First operand 164 states and 441 transitions. Second operand 16 states. [2020-12-23 13:01:17,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:17,736 INFO L93 Difference]: Finished difference Result 291 states and 701 transitions. [2020-12-23 13:01:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:01:17,737 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:17,739 INFO L225 Difference]: With dead ends: 291 [2020-12-23 13:01:17,739 INFO L226 Difference]: Without dead ends: 279 [2020-12-23 13:01:17,739 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=393, Invalid=939, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:01:17,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-23 13:01:17,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 165. [2020-12-23 13:01:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 13:01:17,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 444 transitions. [2020-12-23 13:01:17,745 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 444 transitions. Word has length 13 [2020-12-23 13:01:17,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:17,745 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 444 transitions. [2020-12-23 13:01:17,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:17,745 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 444 transitions. [2020-12-23 13:01:17,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:17,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:17,746 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:17,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:17,947 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:17,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:17,948 INFO L82 PathProgramCache]: Analyzing trace with hash -310791763, now seen corresponding path program 49 times [2020-12-23 13:01:17,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:17,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016753789] [2020-12-23 13:01:17,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:18,039 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 13:01:18,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016753789] [2020-12-23 13:01:18,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082278756] [2020-12-23 13:01:18,040 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 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 13:01:18,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:18,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-23 13:01:18,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:18,231 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:18,257 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 13:01:18,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:18,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-12-23 13:01:18,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978862911] [2020-12-23 13:01:18,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-23 13:01:18,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:18,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-23 13:01:18,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-12-23 13:01:18,259 INFO L87 Difference]: Start difference. First operand 165 states and 444 transitions. Second operand 16 states. [2020-12-23 13:01:18,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:18,971 INFO L93 Difference]: Finished difference Result 295 states and 705 transitions. [2020-12-23 13:01:18,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:01:18,972 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-12-23 13:01:18,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:18,975 INFO L225 Difference]: With dead ends: 295 [2020-12-23 13:01:18,975 INFO L226 Difference]: Without dead ends: 283 [2020-12-23 13:01:18,976 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=370, Invalid=890, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:01:18,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-23 13:01:18,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 156. [2020-12-23 13:01:18,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-12-23 13:01:18,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 412 transitions. [2020-12-23 13:01:18,980 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 412 transitions. Word has length 13 [2020-12-23 13:01:18,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:18,981 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 412 transitions. [2020-12-23 13:01:18,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-23 13:01:18,981 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 412 transitions. [2020-12-23 13:01:18,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:18,981 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:18,982 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:19,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-12-23 13:01:19,192 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:19,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:19,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1536124564, now seen corresponding path program 16 times [2020-12-23 13:01:19,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:19,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038126073] [2020-12-23 13:01:19,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:19,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:19,311 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 13:01:19,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038126073] [2020-12-23 13:01:19,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291141715] [2020-12-23 13:01:19,311 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 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 13:01:19,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:19,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:19,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:19,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:19,595 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 13:01:19,596 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:19,596 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:19,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470244454] [2020-12-23 13:01:19,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:19,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:19,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:19,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:19,597 INFO L87 Difference]: Start difference. First operand 156 states and 412 transitions. Second operand 17 states. [2020-12-23 13:01:19,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:19,662 INFO L93 Difference]: Finished difference Result 201 states and 508 transitions. [2020-12-23 13:01:19,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-23 13:01:19,663 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-23 13:01:19,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:19,665 INFO L225 Difference]: With dead ends: 201 [2020-12-23 13:01:19,666 INFO L226 Difference]: Without dead ends: 198 [2020-12-23 13:01:19,666 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 13:01:19,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-12-23 13:01:19,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 164. [2020-12-23 13:01:19,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 13:01:19,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 430 transitions. [2020-12-23 13:01:19,670 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 430 transitions. Word has length 13 [2020-12-23 13:01:19,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:19,670 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 430 transitions. [2020-12-23 13:01:19,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:19,670 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 430 transitions. [2020-12-23 13:01:19,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:19,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:19,670 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:19,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:19,872 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:19,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:19,873 INFO L82 PathProgramCache]: Analyzing trace with hash -931552816, now seen corresponding path program 17 times [2020-12-23 13:01:19,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:19,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945591467] [2020-12-23 13:01:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:19,981 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 13:01:19,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945591467] [2020-12-23 13:01:19,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [976649951] [2020-12-23 13:01:19,981 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 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 13:01:20,041 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 13:01:20,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:20,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:20,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:20,218 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 13:01:20,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:20,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:20,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586337167] [2020-12-23 13:01:20,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:20,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:20,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:20,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:20,220 INFO L87 Difference]: Start difference. First operand 164 states and 430 transitions. Second operand 17 states. [2020-12-23 13:01:20,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:20,315 INFO L93 Difference]: Finished difference Result 217 states and 538 transitions. [2020-12-23 13:01:20,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-23 13:01:20,316 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-23 13:01:20,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:20,317 INFO L225 Difference]: With dead ends: 217 [2020-12-23 13:01:20,317 INFO L226 Difference]: Without dead ends: 214 [2020-12-23 13:01:20,317 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 13:01:20,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-23 13:01:20,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 163. [2020-12-23 13:01:20,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 13:01:20,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 427 transitions. [2020-12-23 13:01:20,321 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 427 transitions. Word has length 13 [2020-12-23 13:01:20,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:20,321 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 427 transitions. [2020-12-23 13:01:20,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:20,321 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 427 transitions. [2020-12-23 13:01:20,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:20,322 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:20,322 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:20,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:20,537 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:20,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:20,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1642692190, now seen corresponding path program 18 times [2020-12-23 13:01:20,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:20,538 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828600973] [2020-12-23 13:01:20,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:20,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:20,633 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 13:01:20,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828600973] [2020-12-23 13:01:20,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252986855] [2020-12-23 13:01:20,633 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 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 13:01:20,707 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 13:01:20,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:20,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:01:20,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:20,878 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 13:01:20,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:20,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:20,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677796835] [2020-12-23 13:01:20,879 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:20,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:20,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:20,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:20,880 INFO L87 Difference]: Start difference. First operand 163 states and 427 transitions. Second operand 17 states. [2020-12-23 13:01:20,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:20,979 INFO L93 Difference]: Finished difference Result 214 states and 530 transitions. [2020-12-23 13:01:20,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-23 13:01:20,979 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-23 13:01:20,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:20,981 INFO L225 Difference]: With dead ends: 214 [2020-12-23 13:01:20,981 INFO L226 Difference]: Without dead ends: 211 [2020-12-23 13:01:20,982 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 13:01:20,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2020-12-23 13:01:20,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 162. [2020-12-23 13:01:20,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-12-23 13:01:20,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 424 transitions. [2020-12-23 13:01:20,987 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 424 transitions. Word has length 13 [2020-12-23 13:01:20,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:20,988 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 424 transitions. [2020-12-23 13:01:20,988 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:20,988 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 424 transitions. [2020-12-23 13:01:20,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:20,988 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:20,989 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:21,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2020-12-23 13:01:21,202 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:21,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:21,203 INFO L82 PathProgramCache]: Analyzing trace with hash -2015045616, now seen corresponding path program 19 times [2020-12-23 13:01:21,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:21,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765273433] [2020-12-23 13:01:21,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:21,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:21,298 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 13:01:21,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765273433] [2020-12-23 13:01:21,298 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380571420] [2020-12-23 13:01:21,299 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 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 13:01:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:21,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:21,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:21,531 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 13:01:21,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:21,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:21,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383559016] [2020-12-23 13:01:21,532 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:21,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:21,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:21,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:21,533 INFO L87 Difference]: Start difference. First operand 162 states and 424 transitions. Second operand 17 states. [2020-12-23 13:01:21,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:21,674 INFO L93 Difference]: Finished difference Result 213 states and 530 transitions. [2020-12-23 13:01:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-23 13:01:21,675 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-23 13:01:21,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:21,676 INFO L225 Difference]: With dead ends: 213 [2020-12-23 13:01:21,676 INFO L226 Difference]: Without dead ends: 210 [2020-12-23 13:01:21,677 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 13:01:21,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-12-23 13:01:21,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 163. [2020-12-23 13:01:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-12-23 13:01:21,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 429 transitions. [2020-12-23 13:01:21,681 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 429 transitions. Word has length 13 [2020-12-23 13:01:21,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:21,681 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 429 transitions. [2020-12-23 13:01:21,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:21,681 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 429 transitions. [2020-12-23 13:01:21,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:21,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:21,682 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:21,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:21,889 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:21,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:21,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1994489826, now seen corresponding path program 20 times [2020-12-23 13:01:21,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:21,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077356800] [2020-12-23 13:01:21,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:21,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:21,993 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 13:01:21,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077356800] [2020-12-23 13:01:21,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810508176] [2020-12-23 13:01:21,993 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 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 13:01:22,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:22,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:22,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:22,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:22,217 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 13:01:22,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:22,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:22,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839501594] [2020-12-23 13:01:22,218 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:22,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:22,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:22,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:22,219 INFO L87 Difference]: Start difference. First operand 163 states and 429 transitions. Second operand 17 states. [2020-12-23 13:01:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:22,379 INFO L93 Difference]: Finished difference Result 212 states and 530 transitions. [2020-12-23 13:01:22,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:01:22,380 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-23 13:01:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:22,381 INFO L225 Difference]: With dead ends: 212 [2020-12-23 13:01:22,381 INFO L226 Difference]: Without dead ends: 209 [2020-12-23 13:01:22,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-12-23 13:01:22,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-12-23 13:01:22,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 165. [2020-12-23 13:01:22,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-12-23 13:01:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 436 transitions. [2020-12-23 13:01:22,386 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 436 transitions. Word has length 13 [2020-12-23 13:01:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:22,386 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 436 transitions. [2020-12-23 13:01:22,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:22,386 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 436 transitions. [2020-12-23 13:01:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:22,387 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:22,387 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:22,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:22,602 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:22,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:22,602 INFO L82 PathProgramCache]: Analyzing trace with hash -1993826736, now seen corresponding path program 21 times [2020-12-23 13:01:22,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:22,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512371361] [2020-12-23 13:01:22,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:22,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:22,707 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 13:01:22,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512371361] [2020-12-23 13:01:22,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911118953] [2020-12-23 13:01:22,708 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 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 13:01:22,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-23 13:01:22,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:22,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:22,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:22,970 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 13:01:22,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:22,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:22,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802542355] [2020-12-23 13:01:22,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:22,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:22,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:22,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:22,972 INFO L87 Difference]: Start difference. First operand 165 states and 436 transitions. Second operand 17 states. [2020-12-23 13:01:23,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:23,155 INFO L93 Difference]: Finished difference Result 211 states and 530 transitions. [2020-12-23 13:01:23,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:01:23,156 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-23 13:01:23,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:23,157 INFO L225 Difference]: With dead ends: 211 [2020-12-23 13:01:23,157 INFO L226 Difference]: Without dead ends: 208 [2020-12-23 13:01:23,158 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 13:01:23,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-23 13:01:23,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 167. [2020-12-23 13:01:23,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-12-23 13:01:23,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 443 transitions. [2020-12-23 13:01:23,162 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 443 transitions. Word has length 13 [2020-12-23 13:01:23,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:23,162 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 443 transitions. [2020-12-23 13:01:23,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:23,163 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 443 transitions. [2020-12-23 13:01:23,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-23 13:01:23,163 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:23,163 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:23,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-12-23 13:01:23,379 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:23,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:23,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1993805346, now seen corresponding path program 22 times [2020-12-23 13:01:23,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:23,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325761045] [2020-12-23 13:01:23,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:23,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:23,479 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 13:01:23,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325761045] [2020-12-23 13:01:23,479 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052292718] [2020-12-23 13:01:23,479 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 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 13:01:23,543 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:23,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:23,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:23,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:23,732 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 13:01:23,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:23,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:23,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344843127] [2020-12-23 13:01:23,733 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:23,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:23,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:23,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:23,734 INFO L87 Difference]: Start difference. First operand 167 states and 443 transitions. Second operand 17 states. [2020-12-23 13:01:23,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:23,988 INFO L93 Difference]: Finished difference Result 220 states and 554 transitions. [2020-12-23 13:01:23,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:01:23,989 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-12-23 13:01:23,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:23,990 INFO L225 Difference]: With dead ends: 220 [2020-12-23 13:01:23,990 INFO L226 Difference]: Without dead ends: 214 [2020-12-23 13:01:23,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-12-23 13:01:23,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-12-23 13:01:23,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 164. [2020-12-23 13:01:23,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-12-23 13:01:23,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 439 transitions. [2020-12-23 13:01:23,994 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 439 transitions. Word has length 13 [2020-12-23 13:01:23,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:23,994 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 439 transitions. [2020-12-23 13:01:23,994 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:23,994 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 439 transitions. [2020-12-23 13:01:23,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:23,995 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:23,995 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:24,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:24,209 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:24,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:24,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2009124029, now seen corresponding path program 50 times [2020-12-23 13:01:24,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:24,210 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559303272] [2020-12-23 13:01:24,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:24,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:24,326 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 13:01:24,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559303272] [2020-12-23 13:01:24,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010114105] [2020-12-23 13:01:24,327 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 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 13:01:24,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:24,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:24,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:24,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:24,604 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 13:01:24,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:24,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:24,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165306260] [2020-12-23 13:01:24,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:24,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:24,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:24,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:24,607 INFO L87 Difference]: Start difference. First operand 164 states and 439 transitions. Second operand 18 states. [2020-12-23 13:01:24,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:24,824 INFO L93 Difference]: Finished difference Result 210 states and 523 transitions. [2020-12-23 13:01:24,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-23 13:01:24,825 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:24,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:24,827 INFO L225 Difference]: With dead ends: 210 [2020-12-23 13:01:24,827 INFO L226 Difference]: Without dead ends: 208 [2020-12-23 13:01:24,827 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-12-23 13:01:24,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-12-23 13:01:24,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 170. [2020-12-23 13:01:24,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-23 13:01:24,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 449 transitions. [2020-12-23 13:01:24,831 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 449 transitions. Word has length 14 [2020-12-23 13:01:24,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:24,831 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 449 transitions. [2020-12-23 13:01:24,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:24,831 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 449 transitions. [2020-12-23 13:01:24,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:24,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:24,831 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:25,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-12-23 13:01:25,033 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:25,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:25,033 INFO L82 PathProgramCache]: Analyzing trace with hash -2008843169, now seen corresponding path program 51 times [2020-12-23 13:01:25,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:25,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167176033] [2020-12-23 13:01:25,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:25,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:25,148 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 13:01:25,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167176033] [2020-12-23 13:01:25,149 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703089943] [2020-12-23 13:01:25,149 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 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 13:01:25,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:25,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:25,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:25,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:25,391 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:25,393 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:01:25,395 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:25,408 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 13:01:25,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:25,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:25,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699059621] [2020-12-23 13:01:25,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:25,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:25,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:25,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:25,410 INFO L87 Difference]: Start difference. First operand 170 states and 449 transitions. Second operand 17 states. [2020-12-23 13:01:25,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:25,866 INFO L93 Difference]: Finished difference Result 252 states and 614 transitions. [2020-12-23 13:01:25,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:25,867 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:25,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:25,868 INFO L225 Difference]: With dead ends: 252 [2020-12-23 13:01:25,868 INFO L226 Difference]: Without dead ends: 244 [2020-12-23 13:01:25,869 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=275, Invalid=595, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:01:25,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-23 13:01:25,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 169. [2020-12-23 13:01:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-12-23 13:01:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 447 transitions. [2020-12-23 13:01:25,874 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 447 transitions. Word has length 14 [2020-12-23 13:01:25,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:25,874 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 447 transitions. [2020-12-23 13:01:25,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:25,874 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 447 transitions. [2020-12-23 13:01:25,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:25,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:25,875 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:26,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-23 13:01:26,088 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:26,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:26,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1147189887, now seen corresponding path program 52 times [2020-12-23 13:01:26,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:26,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082378132] [2020-12-23 13:01:26,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:26,194 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 13:01:26,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082378132] [2020-12-23 13:01:26,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125482323] [2020-12-23 13:01:26,194 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 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 13:01:26,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:26,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:26,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:26,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:26,507 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 13:01:26,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:26,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:26,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772432270] [2020-12-23 13:01:26,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:26,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:26,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:26,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:26,508 INFO L87 Difference]: Start difference. First operand 169 states and 447 transitions. Second operand 18 states. [2020-12-23 13:01:26,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:26,903 INFO L93 Difference]: Finished difference Result 243 states and 590 transitions. [2020-12-23 13:01:26,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:01:26,903 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:26,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:26,905 INFO L225 Difference]: With dead ends: 243 [2020-12-23 13:01:26,905 INFO L226 Difference]: Without dead ends: 241 [2020-12-23 13:01:26,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:01:26,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-23 13:01:26,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 173. [2020-12-23 13:01:26,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 13:01:26,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 453 transitions. [2020-12-23 13:01:26,910 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 453 transitions. Word has length 14 [2020-12-23 13:01:26,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:26,911 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 453 transitions. [2020-12-23 13:01:26,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:26,911 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 453 transitions. [2020-12-23 13:01:26,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:26,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:26,912 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:27,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-23 13:01:27,124 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:27,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:27,125 INFO L82 PathProgramCache]: Analyzing trace with hash -877283427, now seen corresponding path program 53 times [2020-12-23 13:01:27,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:27,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203065201] [2020-12-23 13:01:27,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:27,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:27,218 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 13:01:27,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203065201] [2020-12-23 13:01:27,218 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830966974] [2020-12-23 13:01:27,218 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 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 13:01:27,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:27,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:27,282 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:27,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:27,537 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 13:01:27,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:27,538 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:27,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139198869] [2020-12-23 13:01:27,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:27,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:27,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:27,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:27,539 INFO L87 Difference]: Start difference. First operand 173 states and 453 transitions. Second operand 18 states. [2020-12-23 13:01:28,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:28,138 INFO L93 Difference]: Finished difference Result 253 states and 610 transitions. [2020-12-23 13:01:28,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:28,139 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:28,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:28,141 INFO L225 Difference]: With dead ends: 253 [2020-12-23 13:01:28,141 INFO L226 Difference]: Without dead ends: 251 [2020-12-23 13:01:28,142 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=541, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:01:28,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-23 13:01:28,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 175. [2020-12-23 13:01:28,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 13:01:28,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 460 transitions. [2020-12-23 13:01:28,145 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 460 transitions. Word has length 14 [2020-12-23 13:01:28,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:28,145 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 460 transitions. [2020-12-23 13:01:28,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:28,145 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 460 transitions. [2020-12-23 13:01:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:28,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:28,146 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:28,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:28,347 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:28,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:28,348 INFO L82 PathProgramCache]: Analyzing trace with hash -876677997, now seen corresponding path program 54 times [2020-12-23 13:01:28,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:28,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079930696] [2020-12-23 13:01:28,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:28,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:28,464 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 13:01:28,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079930696] [2020-12-23 13:01:28,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307173221] [2020-12-23 13:01:28,465 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 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 13:01:28,527 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:28,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:28,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:28,529 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:28,786 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 13:01:28,786 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:28,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:28,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382222133] [2020-12-23 13:01:28,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:28,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:28,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:28,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:28,787 INFO L87 Difference]: Start difference. First operand 175 states and 460 transitions. Second operand 18 states. [2020-12-23 13:01:29,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:29,729 INFO L93 Difference]: Finished difference Result 254 states and 623 transitions. [2020-12-23 13:01:29,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:01:29,730 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:29,732 INFO L225 Difference]: With dead ends: 254 [2020-12-23 13:01:29,732 INFO L226 Difference]: Without dead ends: 252 [2020-12-23 13:01:29,732 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:01:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-12-23 13:01:29,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 177. [2020-12-23 13:01:29,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:01:29,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 467 transitions. [2020-12-23 13:01:29,737 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 467 transitions. Word has length 14 [2020-12-23 13:01:29,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:29,738 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 467 transitions. [2020-12-23 13:01:29,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:29,738 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 467 transitions. [2020-12-23 13:01:29,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:29,738 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:29,738 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:29,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:29,953 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:29,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:29,953 INFO L82 PathProgramCache]: Analyzing trace with hash -876658529, now seen corresponding path program 55 times [2020-12-23 13:01:29,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:29,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654319983] [2020-12-23 13:01:29,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:29,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:30,069 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 13:01:30,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654319983] [2020-12-23 13:01:30,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931161351] [2020-12-23 13:01:30,070 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 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 13:01:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:30,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:30,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:30,346 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:30,348 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:30,350 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:30,366 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 13:01:30,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:30,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:30,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781393888] [2020-12-23 13:01:30,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:30,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:30,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:30,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:30,369 INFO L87 Difference]: Start difference. First operand 177 states and 467 transitions. Second operand 17 states. [2020-12-23 13:01:31,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:31,129 INFO L93 Difference]: Finished difference Result 268 states and 657 transitions. [2020-12-23 13:01:31,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:31,130 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:31,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:31,132 INFO L225 Difference]: With dead ends: 268 [2020-12-23 13:01:31,132 INFO L226 Difference]: Without dead ends: 260 [2020-12-23 13:01:31,132 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 13:01:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-23 13:01:31,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 178. [2020-12-23 13:01:31,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 13:01:31,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 472 transitions. [2020-12-23 13:01:31,136 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 472 transitions. Word has length 14 [2020-12-23 13:01:31,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:31,136 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 472 transitions. [2020-12-23 13:01:31,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:31,136 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 472 transitions. [2020-12-23 13:01:31,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:31,137 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:31,137 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:31,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:31,338 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:31,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:31,339 INFO L82 PathProgramCache]: Analyzing trace with hash -876656607, now seen corresponding path program 56 times [2020-12-23 13:01:31,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:31,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987371608] [2020-12-23 13:01:31,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:31,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:31,458 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 13:01:31,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987371608] [2020-12-23 13:01:31,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061988962] [2020-12-23 13:01:31,459 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 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 13:01:31,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:31,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:31,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:31,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:31,736 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:01:31,738 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:01:31,740 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:31,758 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 13:01:31,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:31,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:31,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939073920] [2020-12-23 13:01:31,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:31,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:31,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:31,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:31,759 INFO L87 Difference]: Start difference. First operand 178 states and 472 transitions. Second operand 17 states. [2020-12-23 13:01:32,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:32,537 INFO L93 Difference]: Finished difference Result 285 states and 698 transitions. [2020-12-23 13:01:32,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:01:32,538 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:32,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:32,540 INFO L225 Difference]: With dead ends: 285 [2020-12-23 13:01:32,540 INFO L226 Difference]: Without dead ends: 277 [2020-12-23 13:01:32,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=372, Invalid=818, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 13:01:32,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-12-23 13:01:32,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 170. [2020-12-23 13:01:32,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-12-23 13:01:32,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 452 transitions. [2020-12-23 13:01:32,545 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 452 transitions. Word has length 14 [2020-12-23 13:01:32,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:32,545 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 452 transitions. [2020-12-23 13:01:32,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:32,546 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 452 transitions. [2020-12-23 13:01:32,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:32,546 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:32,546 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:32,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:32,756 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:32,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:32,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1434687085, now seen corresponding path program 57 times [2020-12-23 13:01:32,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:32,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443907241] [2020-12-23 13:01:32,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:32,864 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 13:01:32,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443907241] [2020-12-23 13:01:32,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770092216] [2020-12-23 13:01:32,865 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 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 13:01:32,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:01:32,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:32,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:32,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:33,201 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 13:01:33,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:33,201 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:33,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21010164] [2020-12-23 13:01:33,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:33,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:33,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:33,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:33,203 INFO L87 Difference]: Start difference. First operand 170 states and 452 transitions. Second operand 18 states. [2020-12-23 13:01:33,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:33,690 INFO L93 Difference]: Finished difference Result 251 states and 610 transitions. [2020-12-23 13:01:33,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:33,691 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:33,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:33,693 INFO L225 Difference]: With dead ends: 251 [2020-12-23 13:01:33,693 INFO L226 Difference]: Without dead ends: 249 [2020-12-23 13:01:33,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:01:33,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-12-23 13:01:33,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 175. [2020-12-23 13:01:33,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 13:01:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 461 transitions. [2020-12-23 13:01:33,699 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 461 transitions. Word has length 14 [2020-12-23 13:01:33,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:33,699 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 461 transitions. [2020-12-23 13:01:33,699 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:33,699 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 461 transitions. [2020-12-23 13:01:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:33,700 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:33,700 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:33,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2020-12-23 13:01:33,903 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:33,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:33,904 INFO L82 PathProgramCache]: Analyzing trace with hash -1434629425, now seen corresponding path program 58 times [2020-12-23 13:01:33,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:33,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170404736] [2020-12-23 13:01:33,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:34,025 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 13:01:34,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170404736] [2020-12-23 13:01:34,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899783134] [2020-12-23 13:01:34,026 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 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 13:01:34,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:34,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:34,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:34,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:34,351 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 13:01:34,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:34,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:34,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831295343] [2020-12-23 13:01:34,352 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:34,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:34,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:34,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:34,353 INFO L87 Difference]: Start difference. First operand 175 states and 461 transitions. Second operand 18 states. [2020-12-23 13:01:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:34,867 INFO L93 Difference]: Finished difference Result 246 states and 605 transitions. [2020-12-23 13:01:34,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:34,868 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:34,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:34,870 INFO L225 Difference]: With dead ends: 246 [2020-12-23 13:01:34,870 INFO L226 Difference]: Without dead ends: 244 [2020-12-23 13:01:34,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=523, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:01:34,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-23 13:01:34,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 174. [2020-12-23 13:01:34,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 13:01:34,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 458 transitions. [2020-12-23 13:01:34,874 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 458 transitions. Word has length 14 [2020-12-23 13:01:34,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:34,875 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 458 transitions. [2020-12-23 13:01:34,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:34,875 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 458 transitions. [2020-12-23 13:01:34,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:34,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:34,876 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:35,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:35,088 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:35,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:35,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1657521417, now seen corresponding path program 59 times [2020-12-23 13:01:35,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:35,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487923725] [2020-12-23 13:01:35,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:35,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:35,195 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 13:01:35,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487923725] [2020-12-23 13:01:35,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [188541450] [2020-12-23 13:01:35,195 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 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 13:01:35,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:35,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:35,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:35,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:35,518 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 13:01:35,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:35,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:35,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125966388] [2020-12-23 13:01:35,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:35,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:35,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:35,521 INFO L87 Difference]: Start difference. First operand 174 states and 458 transitions. Second operand 18 states. [2020-12-23 13:01:36,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:36,024 INFO L93 Difference]: Finished difference Result 260 states and 626 transitions. [2020-12-23 13:01:36,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:36,025 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:36,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:36,028 INFO L225 Difference]: With dead ends: 260 [2020-12-23 13:01:36,028 INFO L226 Difference]: Without dead ends: 258 [2020-12-23 13:01:36,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:01:36,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-12-23 13:01:36,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 175. [2020-12-23 13:01:36,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 13:01:36,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 460 transitions. [2020-12-23 13:01:36,033 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 460 transitions. Word has length 14 [2020-12-23 13:01:36,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:36,033 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 460 transitions. [2020-12-23 13:01:36,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:36,033 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 460 transitions. [2020-12-23 13:01:36,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:36,034 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:36,034 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:36,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:36,235 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:36,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:36,236 INFO L82 PathProgramCache]: Analyzing trace with hash -1657463757, now seen corresponding path program 60 times [2020-12-23 13:01:36,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:36,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1315281952] [2020-12-23 13:01:36,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:36,355 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 13:01:36,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1315281952] [2020-12-23 13:01:36,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999774556] [2020-12-23 13:01:36,356 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 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 13:01:36,426 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:36,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:36,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:36,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:36,725 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 13:01:36,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:36,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:36,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101104182] [2020-12-23 13:01:36,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:36,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:36,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:36,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:36,727 INFO L87 Difference]: Start difference. First operand 175 states and 460 transitions. Second operand 18 states. [2020-12-23 13:01:37,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:37,265 INFO L93 Difference]: Finished difference Result 250 states and 608 transitions. [2020-12-23 13:01:37,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:37,266 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:37,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:37,268 INFO L225 Difference]: With dead ends: 250 [2020-12-23 13:01:37,268 INFO L226 Difference]: Without dead ends: 248 [2020-12-23 13:01:37,268 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=548, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:01:37,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-23 13:01:37,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 174. [2020-12-23 13:01:37,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 13:01:37,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 457 transitions. [2020-12-23 13:01:37,272 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 457 transitions. Word has length 14 [2020-12-23 13:01:37,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:37,272 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 457 transitions. [2020-12-23 13:01:37,272 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:37,272 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 457 transitions. [2020-12-23 13:01:37,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:37,273 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:37,273 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:37,473 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:37,474 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:37,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:37,474 INFO L82 PathProgramCache]: Analyzing trace with hash -1638753087, now seen corresponding path program 61 times [2020-12-23 13:01:37,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:37,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147404167] [2020-12-23 13:01:37,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:37,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:37,583 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 13:01:37,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147404167] [2020-12-23 13:01:37,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1860165523] [2020-12-23 13:01:37,587 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 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 13:01:37,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:37,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:37,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:37,933 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 13:01:37,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:37,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:37,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145963167] [2020-12-23 13:01:37,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:37,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:37,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:37,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:37,936 INFO L87 Difference]: Start difference. First operand 174 states and 457 transitions. Second operand 18 states. [2020-12-23 13:01:38,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:38,625 INFO L93 Difference]: Finished difference Result 259 states and 628 transitions. [2020-12-23 13:01:38,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:38,626 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:38,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:38,628 INFO L225 Difference]: With dead ends: 259 [2020-12-23 13:01:38,628 INFO L226 Difference]: Without dead ends: 257 [2020-12-23 13:01:38,628 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:01:38,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-12-23 13:01:38,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 176. [2020-12-23 13:01:38,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-12-23 13:01:38,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 464 transitions. [2020-12-23 13:01:38,633 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 464 transitions. Word has length 14 [2020-12-23 13:01:38,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:38,633 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 464 transitions. [2020-12-23 13:01:38,633 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:38,633 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 464 transitions. [2020-12-23 13:01:38,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:38,633 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:38,634 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:38,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:38,835 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:38,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:38,835 INFO L82 PathProgramCache]: Analyzing trace with hash -1638089997, now seen corresponding path program 62 times [2020-12-23 13:01:38,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:38,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884552151] [2020-12-23 13:01:38,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:38,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:38,944 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 13:01:38,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884552151] [2020-12-23 13:01:38,944 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304887230] [2020-12-23 13:01:38,945 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 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 13:01:39,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:39,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:39,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:39,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:39,269 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 13:01:39,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:39,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:39,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299979593] [2020-12-23 13:01:39,270 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:39,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:39,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:39,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:39,271 INFO L87 Difference]: Start difference. First operand 176 states and 464 transitions. Second operand 18 states. [2020-12-23 13:01:40,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:40,092 INFO L93 Difference]: Finished difference Result 264 states and 646 transitions. [2020-12-23 13:01:40,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:01:40,093 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:40,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:40,095 INFO L225 Difference]: With dead ends: 264 [2020-12-23 13:01:40,095 INFO L226 Difference]: Without dead ends: 262 [2020-12-23 13:01:40,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=335, Invalid=787, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:01:40,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-23 13:01:40,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 179. [2020-12-23 13:01:40,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 13:01:40,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 476 transitions. [2020-12-23 13:01:40,100 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 476 transitions. Word has length 14 [2020-12-23 13:01:40,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:40,100 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 476 transitions. [2020-12-23 13:01:40,100 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:40,100 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 476 transitions. [2020-12-23 13:01:40,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:40,100 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:40,101 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:40,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-12-23 13:01:40,302 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:40,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:40,302 INFO L82 PathProgramCache]: Analyzing trace with hash -1638068607, now seen corresponding path program 63 times [2020-12-23 13:01:40,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:40,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181276850] [2020-12-23 13:01:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:40,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:40,407 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 13:01:40,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181276850] [2020-12-23 13:01:40,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248401660] [2020-12-23 13:01:40,408 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 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 13:01:40,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:01:40,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:40,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:01:40,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:40,692 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:40,694 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:01:40,695 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:40,713 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 13:01:40,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:40,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:40,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794670152] [2020-12-23 13:01:40,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:40,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:40,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:40,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:40,716 INFO L87 Difference]: Start difference. First operand 179 states and 476 transitions. Second operand 17 states. [2020-12-23 13:01:41,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:41,756 INFO L93 Difference]: Finished difference Result 283 states and 700 transitions. [2020-12-23 13:01:41,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:01:41,757 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:41,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:41,759 INFO L225 Difference]: With dead ends: 283 [2020-12-23 13:01:41,760 INFO L226 Difference]: Without dead ends: 275 [2020-12-23 13:01:41,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 362 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:01:41,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-23 13:01:41,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 173. [2020-12-23 13:01:41,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 13:01:41,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 469 transitions. [2020-12-23 13:01:41,763 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 469 transitions. Word has length 14 [2020-12-23 13:01:41,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:41,763 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 469 transitions. [2020-12-23 13:01:41,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:41,764 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 469 transitions. [2020-12-23 13:01:41,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:41,764 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:41,764 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:41,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-12-23 13:01:41,973 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:41,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:41,973 INFO L82 PathProgramCache]: Analyzing trace with hash -1636907967, now seen corresponding path program 64 times [2020-12-23 13:01:41,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:41,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955752204] [2020-12-23 13:01:41,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:41,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:42,081 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 13:01:42,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955752204] [2020-12-23 13:01:42,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192194086] [2020-12-23 13:01:42,081 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 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 13:01:42,152 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:42,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:42,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:42,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:42,392 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 13:01:42,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:42,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:42,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55684038] [2020-12-23 13:01:42,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:42,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:42,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:42,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=236, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:42,394 INFO L87 Difference]: Start difference. First operand 173 states and 469 transitions. Second operand 18 states. [2020-12-23 13:01:43,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:43,103 INFO L93 Difference]: Finished difference Result 272 states and 667 transitions. [2020-12-23 13:01:43,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:01:43,104 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:43,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:43,106 INFO L225 Difference]: With dead ends: 272 [2020-12-23 13:01:43,106 INFO L226 Difference]: Without dead ends: 270 [2020-12-23 13:01:43,106 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=295, Invalid=761, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:01:43,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-12-23 13:01:43,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 173. [2020-12-23 13:01:43,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 13:01:43,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 469 transitions. [2020-12-23 13:01:43,112 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 469 transitions. Word has length 14 [2020-12-23 13:01:43,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:43,112 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 469 transitions. [2020-12-23 13:01:43,112 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:43,112 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 469 transitions. [2020-12-23 13:01:43,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:43,113 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:43,113 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:43,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:43,328 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:43,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:43,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1636302537, now seen corresponding path program 65 times [2020-12-23 13:01:43,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:43,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653844894] [2020-12-23 13:01:43,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:43,438 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 13:01:43,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653844894] [2020-12-23 13:01:43,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099003343] [2020-12-23 13:01:43,439 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 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 13:01:43,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:43,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:43,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:43,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:43,766 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 13:01:43,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:43,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:43,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500926781] [2020-12-23 13:01:43,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:43,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:43,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:43,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:43,768 INFO L87 Difference]: Start difference. First operand 173 states and 469 transitions. Second operand 18 states. [2020-12-23 13:01:44,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:44,537 INFO L93 Difference]: Finished difference Result 257 states and 638 transitions. [2020-12-23 13:01:44,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:01:44,538 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:44,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:44,540 INFO L225 Difference]: With dead ends: 257 [2020-12-23 13:01:44,541 INFO L226 Difference]: Without dead ends: 255 [2020-12-23 13:01:44,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=693, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:01:44,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-23 13:01:44,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 175. [2020-12-23 13:01:44,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 13:01:44,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 476 transitions. [2020-12-23 13:01:44,546 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 476 transitions. Word has length 14 [2020-12-23 13:01:44,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:44,546 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 476 transitions. [2020-12-23 13:01:44,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:44,546 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 476 transitions. [2020-12-23 13:01:44,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:44,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:44,547 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:44,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:44,762 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:44,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:44,762 INFO L82 PathProgramCache]: Analyzing trace with hash -1636283069, now seen corresponding path program 66 times [2020-12-23 13:01:44,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:44,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567362441] [2020-12-23 13:01:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:44,884 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 13:01:44,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567362441] [2020-12-23 13:01:44,885 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669979149] [2020-12-23 13:01:44,885 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 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 13:01:44,948 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 13:01:44,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:44,949 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:01:44,950 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:45,166 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:45,168 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:45,169 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:45,184 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 13:01:45,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:45,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:45,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920011545] [2020-12-23 13:01:45,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:45,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:45,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:45,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:45,187 INFO L87 Difference]: Start difference. First operand 175 states and 476 transitions. Second operand 17 states. [2020-12-23 13:01:46,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:46,355 INFO L93 Difference]: Finished difference Result 281 states and 702 transitions. [2020-12-23 13:01:46,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:01:46,356 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:46,360 INFO L225 Difference]: With dead ends: 281 [2020-12-23 13:01:46,360 INFO L226 Difference]: Without dead ends: 273 [2020-12-23 13:01:46,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 13:01:46,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-12-23 13:01:46,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 177. [2020-12-23 13:01:46,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:01:46,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 486 transitions. [2020-12-23 13:01:46,366 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 486 transitions. Word has length 14 [2020-12-23 13:01:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:46,367 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 486 transitions. [2020-12-23 13:01:46,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:46,367 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 486 transitions. [2020-12-23 13:01:46,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:46,367 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:46,368 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:46,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:46,581 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:46,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1636281147, now seen corresponding path program 67 times [2020-12-23 13:01:46,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:46,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813542629] [2020-12-23 13:01:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:46,718 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 13:01:46,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813542629] [2020-12-23 13:01:46,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43618079] [2020-12-23 13:01:46,718 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 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 13:01:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:46,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:46,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:47,029 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:01:47,032 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:01:47,034 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:47,038 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:47,042 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:47,045 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:01:47,049 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:47,052 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:01:47,088 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 13:01:47,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:47,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:01:47,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646622018] [2020-12-23 13:01:47,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:01:47,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:47,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:01:47,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:01:47,090 INFO L87 Difference]: Start difference. First operand 177 states and 486 transitions. Second operand 17 states. [2020-12-23 13:01:48,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:48,282 INFO L93 Difference]: Finished difference Result 283 states and 707 transitions. [2020-12-23 13:01:48,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:01:48,283 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:01:48,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:48,285 INFO L225 Difference]: With dead ends: 283 [2020-12-23 13:01:48,286 INFO L226 Difference]: Without dead ends: 275 [2020-12-23 13:01:48,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:01:48,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-23 13:01:48,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 172. [2020-12-23 13:01:48,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-12-23 13:01:48,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 464 transitions. [2020-12-23 13:01:48,292 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 464 transitions. Word has length 14 [2020-12-23 13:01:48,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:48,292 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 464 transitions. [2020-12-23 13:01:48,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:01:48,293 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 464 transitions. [2020-12-23 13:01:48,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:48,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:48,293 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:48,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:48,494 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:48,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:48,495 INFO L82 PathProgramCache]: Analyzing trace with hash -1757227135, now seen corresponding path program 68 times [2020-12-23 13:01:48,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:48,496 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087672046] [2020-12-23 13:01:48,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:48,629 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 13:01:48,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087672046] [2020-12-23 13:01:48,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973966508] [2020-12-23 13:01:48,633 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 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 13:01:48,701 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:48,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:48,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:48,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:48,924 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 13:01:48,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:48,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:48,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952648280] [2020-12-23 13:01:48,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:48,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:48,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:48,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:48,926 INFO L87 Difference]: Start difference. First operand 172 states and 464 transitions. Second operand 18 states. [2020-12-23 13:01:49,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:49,458 INFO L93 Difference]: Finished difference Result 246 states and 611 transitions. [2020-12-23 13:01:49,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:01:49,459 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:49,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:49,460 INFO L225 Difference]: With dead ends: 246 [2020-12-23 13:01:49,461 INFO L226 Difference]: Without dead ends: 244 [2020-12-23 13:01:49,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=271, Invalid=599, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:01:49,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-12-23 13:01:49,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 173. [2020-12-23 13:01:49,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-12-23 13:01:49,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 467 transitions. [2020-12-23 13:01:49,466 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 467 transitions. Word has length 14 [2020-12-23 13:01:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:49,466 INFO L481 AbstractCegarLoop]: Abstraction has 173 states and 467 transitions. [2020-12-23 13:01:49,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:49,467 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 467 transitions. [2020-12-23 13:01:49,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:49,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:49,467 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:49,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:49,670 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:49,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:49,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1757225213, now seen corresponding path program 69 times [2020-12-23 13:01:49,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:49,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427062514] [2020-12-23 13:01:49,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:49,806 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 13:01:49,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427062514] [2020-12-23 13:01:49,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005969930] [2020-12-23 13:01:49,807 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 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 13:01:49,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-23 13:01:49,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:49,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:49,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:50,088 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 13:01:50,089 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:50,089 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:50,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739906260] [2020-12-23 13:01:50,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:50,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:50,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:50,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:50,090 INFO L87 Difference]: Start difference. First operand 173 states and 467 transitions. Second operand 18 states. [2020-12-23 13:01:50,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:50,663 INFO L93 Difference]: Finished difference Result 258 states and 634 transitions. [2020-12-23 13:01:50,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-23 13:01:50,664 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:50,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:50,666 INFO L225 Difference]: With dead ends: 258 [2020-12-23 13:01:50,666 INFO L226 Difference]: Without dead ends: 256 [2020-12-23 13:01:50,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=269, Invalid=601, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:01:50,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-12-23 13:01:50,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 174. [2020-12-23 13:01:50,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 13:01:50,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 470 transitions. [2020-12-23 13:01:50,670 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 470 transitions. Word has length 14 [2020-12-23 13:01:50,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:50,670 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 470 transitions. [2020-12-23 13:01:50,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:50,671 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 470 transitions. [2020-12-23 13:01:50,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:50,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:50,671 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:50,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:50,874 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:50,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:50,874 INFO L82 PathProgramCache]: Analyzing trace with hash -1755380093, now seen corresponding path program 70 times [2020-12-23 13:01:50,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:50,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499029512] [2020-12-23 13:01:50,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:51,016 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 13:01:51,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499029512] [2020-12-23 13:01:51,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740117901] [2020-12-23 13:01:51,017 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 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 13:01:51,078 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:51,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:51,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:51,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:51,334 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 13:01:51,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:51,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:51,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475707404] [2020-12-23 13:01:51,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:51,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:51,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:51,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:51,336 INFO L87 Difference]: Start difference. First operand 174 states and 470 transitions. Second operand 18 states. [2020-12-23 13:01:51,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:51,959 INFO L93 Difference]: Finished difference Result 255 states and 633 transitions. [2020-12-23 13:01:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:01:51,960 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:51,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:51,962 INFO L225 Difference]: With dead ends: 255 [2020-12-23 13:01:51,962 INFO L226 Difference]: Without dead ends: 253 [2020-12-23 13:01:51,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:01:51,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-23 13:01:51,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 174. [2020-12-23 13:01:51,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-12-23 13:01:51,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 470 transitions. [2020-12-23 13:01:51,967 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 470 transitions. Word has length 14 [2020-12-23 13:01:51,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:51,968 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 470 transitions. [2020-12-23 13:01:51,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:51,968 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 470 transitions. [2020-12-23 13:01:51,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:51,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:51,968 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:52,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:52,176 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:52,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:52,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1755318589, now seen corresponding path program 71 times [2020-12-23 13:01:52,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:52,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586626635] [2020-12-23 13:01:52,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:52,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:52,328 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 13:01:52,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586626635] [2020-12-23 13:01:52,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502533257] [2020-12-23 13:01:52,329 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 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 13:01:52,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:01:52,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:52,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:52,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:52,608 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 13:01:52,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:52,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:52,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683072384] [2020-12-23 13:01:52,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:52,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:52,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:52,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:52,610 INFO L87 Difference]: Start difference. First operand 174 states and 470 transitions. Second operand 18 states. [2020-12-23 13:01:53,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:53,041 INFO L93 Difference]: Finished difference Result 243 states and 606 transitions. [2020-12-23 13:01:53,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:01:53,042 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:53,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:53,043 INFO L225 Difference]: With dead ends: 243 [2020-12-23 13:01:53,043 INFO L226 Difference]: Without dead ends: 241 [2020-12-23 13:01:53,043 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=196, Invalid=454, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:01:53,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-12-23 13:01:53,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 177. [2020-12-23 13:01:53,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:01:53,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 471 transitions. [2020-12-23 13:01:53,048 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 471 transitions. Word has length 14 [2020-12-23 13:01:53,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:53,048 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 471 transitions. [2020-12-23 13:01:53,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:53,048 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 471 transitions. [2020-12-23 13:01:53,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:53,048 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:53,048 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:53,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-12-23 13:01:53,249 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:53,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:53,250 INFO L82 PathProgramCache]: Analyzing trace with hash -75156835, now seen corresponding path program 72 times [2020-12-23 13:01:53,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:53,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844465100] [2020-12-23 13:01:53,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:53,368 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 13:01:53,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844465100] [2020-12-23 13:01:53,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392391531] [2020-12-23 13:01:53,369 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 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 13:01:53,467 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:01:53,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:53,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:53,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:53,741 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 13:01:53,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:53,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:53,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66473016] [2020-12-23 13:01:53,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:53,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:53,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:53,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:53,743 INFO L87 Difference]: Start difference. First operand 177 states and 471 transitions. Second operand 18 states. [2020-12-23 13:01:54,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:54,303 INFO L93 Difference]: Finished difference Result 273 states and 664 transitions. [2020-12-23 13:01:54,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:01:54,304 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:54,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:54,305 INFO L225 Difference]: With dead ends: 273 [2020-12-23 13:01:54,305 INFO L226 Difference]: Without dead ends: 271 [2020-12-23 13:01:54,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=231, Invalid=581, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:01:54,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-12-23 13:01:54,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 177. [2020-12-23 13:01:54,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:01:54,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 471 transitions. [2020-12-23 13:01:54,310 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 471 transitions. Word has length 14 [2020-12-23 13:01:54,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:54,311 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 471 transitions. [2020-12-23 13:01:54,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:54,311 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 471 transitions. [2020-12-23 13:01:54,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:54,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:54,312 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:54,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:54,522 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:54,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:54,522 INFO L82 PathProgramCache]: Analyzing trace with hash -75154913, now seen corresponding path program 73 times [2020-12-23 13:01:54,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:54,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874615523] [2020-12-23 13:01:54,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:54,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:54,645 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 13:01:54,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874615523] [2020-12-23 13:01:54,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265571101] [2020-12-23 13:01:54,645 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 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 13:01:54,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:54,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:54,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:54,915 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 13:01:54,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:54,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:54,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463771405] [2020-12-23 13:01:54,916 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:54,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:54,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:54,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:54,917 INFO L87 Difference]: Start difference. First operand 177 states and 471 transitions. Second operand 18 states. [2020-12-23 13:01:55,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:55,533 INFO L93 Difference]: Finished difference Result 280 states and 678 transitions. [2020-12-23 13:01:55,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:01:55,535 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:55,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:55,536 INFO L225 Difference]: With dead ends: 280 [2020-12-23 13:01:55,536 INFO L226 Difference]: Without dead ends: 278 [2020-12-23 13:01:55,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=228, Invalid=584, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:01:55,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-23 13:01:55,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 178. [2020-12-23 13:01:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 13:01:55,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 474 transitions. [2020-12-23 13:01:55,542 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 474 transitions. Word has length 14 [2020-12-23 13:01:55,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:55,542 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 474 transitions. [2020-12-23 13:01:55,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:55,542 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 474 transitions. [2020-12-23 13:01:55,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:55,543 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:55,543 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:55,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2020-12-23 13:01:55,745 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:55,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:55,745 INFO L82 PathProgramCache]: Analyzing trace with hash -73309793, now seen corresponding path program 74 times [2020-12-23 13:01:55,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:55,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481308067] [2020-12-23 13:01:55,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:55,873 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 13:01:55,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481308067] [2020-12-23 13:01:55,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1948455830] [2020-12-23 13:01:55,873 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 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 13:01:55,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:55,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:55,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:55,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:56,174 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 13:01:56,175 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:56,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:56,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778570809] [2020-12-23 13:01:56,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:56,176 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:56,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:56,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:56,176 INFO L87 Difference]: Start difference. First operand 178 states and 474 transitions. Second operand 18 states. [2020-12-23 13:01:56,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:56,868 INFO L93 Difference]: Finished difference Result 273 states and 666 transitions. [2020-12-23 13:01:56,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:01:56,869 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:56,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:56,871 INFO L225 Difference]: With dead ends: 273 [2020-12-23 13:01:56,871 INFO L226 Difference]: Without dead ends: 271 [2020-12-23 13:01:56,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:01:56,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-12-23 13:01:56,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 178. [2020-12-23 13:01:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-12-23 13:01:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 474 transitions. [2020-12-23 13:01:56,876 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 474 transitions. Word has length 14 [2020-12-23 13:01:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:56,876 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 474 transitions. [2020-12-23 13:01:56,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:56,876 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 474 transitions. [2020-12-23 13:01:56,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:56,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:56,877 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:57,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:01:57,077 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:57,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:57,078 INFO L82 PathProgramCache]: Analyzing trace with hash -73248289, now seen corresponding path program 75 times [2020-12-23 13:01:57,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:57,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392675456] [2020-12-23 13:01:57,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:57,217 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 13:01:57,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392675456] [2020-12-23 13:01:57,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465305339] [2020-12-23 13:01:57,217 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 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 13:01:57,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:01:57,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:57,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:57,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:01:57,509 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:57,509 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:57,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073793235] [2020-12-23 13:01:57,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:57,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:57,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:57,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:57,510 INFO L87 Difference]: Start difference. First operand 178 states and 474 transitions. Second operand 18 states. [2020-12-23 13:01:57,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:57,947 INFO L93 Difference]: Finished difference Result 249 states and 615 transitions. [2020-12-23 13:01:57,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:01:57,948 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:57,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:57,949 INFO L225 Difference]: With dead ends: 249 [2020-12-23 13:01:57,949 INFO L226 Difference]: Without dead ends: 247 [2020-12-23 13:01:57,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=194, Invalid=508, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:01:57,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2020-12-23 13:01:57,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 177. [2020-12-23 13:01:57,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:01:57,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 470 transitions. [2020-12-23 13:01:57,954 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 470 transitions. Word has length 14 [2020-12-23 13:01:57,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:57,954 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 470 transitions. [2020-12-23 13:01:57,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:57,954 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 470 transitions. [2020-12-23 13:01:57,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:57,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:57,955 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:58,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-12-23 13:01:58,159 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:58,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:58,160 INFO L82 PathProgramCache]: Analyzing trace with hash 506661395, now seen corresponding path program 76 times [2020-12-23 13:01:58,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:58,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326487423] [2020-12-23 13:01:58,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:58,275 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 13:01:58,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326487423] [2020-12-23 13:01:58,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1352181981] [2020-12-23 13:01:58,276 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 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 13:01:58,336 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:01:58,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:58,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:58,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:58,571 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 13:01:58,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:58,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:58,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664526758] [2020-12-23 13:01:58,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:58,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:58,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:58,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:58,573 INFO L87 Difference]: Start difference. First operand 177 states and 470 transitions. Second operand 18 states. [2020-12-23 13:01:59,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:01:59,311 INFO L93 Difference]: Finished difference Result 276 states and 668 transitions. [2020-12-23 13:01:59,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:01:59,312 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:01:59,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:01:59,314 INFO L225 Difference]: With dead ends: 276 [2020-12-23 13:01:59,314 INFO L226 Difference]: Without dead ends: 274 [2020-12-23 13:01:59,314 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=337, Invalid=853, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 13:01:59,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-12-23 13:01:59,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 177. [2020-12-23 13:01:59,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:01:59,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 470 transitions. [2020-12-23 13:01:59,320 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 470 transitions. Word has length 14 [2020-12-23 13:01:59,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:01:59,320 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 470 transitions. [2020-12-23 13:01:59,320 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:01:59,320 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 470 transitions. [2020-12-23 13:01:59,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:01:59,321 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:01:59,321 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:01:59,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-12-23 13:01:59,535 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:01:59,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:01:59,536 INFO L82 PathProgramCache]: Analyzing trace with hash 506663317, now seen corresponding path program 77 times [2020-12-23 13:01:59,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:01:59,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998891545] [2020-12-23 13:01:59,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:01:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:01:59,654 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 13:01:59,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998891545] [2020-12-23 13:01:59,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205409163] [2020-12-23 13:01:59,655 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 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 13:01:59,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:01:59,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:01:59,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:01:59,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:01:59,954 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 13:01:59,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:01:59,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:01:59,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982438001] [2020-12-23 13:01:59,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:01:59,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:01:59,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:01:59,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:01:59,956 INFO L87 Difference]: Start difference. First operand 177 states and 470 transitions. Second operand 18 states. [2020-12-23 13:02:00,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:00,727 INFO L93 Difference]: Finished difference Result 288 states and 693 transitions. [2020-12-23 13:02:00,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:02:00,728 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:00,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:00,729 INFO L225 Difference]: With dead ends: 288 [2020-12-23 13:02:00,730 INFO L226 Difference]: Without dead ends: 286 [2020-12-23 13:02:00,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=757, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:02:00,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-12-23 13:02:00,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 180. [2020-12-23 13:02:00,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-12-23 13:02:00,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 480 transitions. [2020-12-23 13:02:00,734 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 480 transitions. Word has length 14 [2020-12-23 13:02:00,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:00,734 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 480 transitions. [2020-12-23 13:02:00,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:00,734 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 480 transitions. [2020-12-23 13:02:00,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:00,734 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:00,734 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:00,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-12-23 13:02:00,935 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:00,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:00,936 INFO L82 PathProgramCache]: Analyzing trace with hash 525429725, now seen corresponding path program 78 times [2020-12-23 13:02:00,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:00,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076106160] [2020-12-23 13:02:00,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:00,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:01,071 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 13:02:01,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076106160] [2020-12-23 13:02:01,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177381139] [2020-12-23 13:02:01,072 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 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 13:02:01,150 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:01,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:01,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:01,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:01,389 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 13:02:01,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:01,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:01,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064450466] [2020-12-23 13:02:01,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:01,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:01,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:01,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:01,391 INFO L87 Difference]: Start difference. First operand 180 states and 480 transitions. Second operand 18 states. [2020-12-23 13:02:02,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:02,272 INFO L93 Difference]: Finished difference Result 280 states and 682 transitions. [2020-12-23 13:02:02,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:02:02,273 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:02,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:02,274 INFO L225 Difference]: With dead ends: 280 [2020-12-23 13:02:02,274 INFO L226 Difference]: Without dead ends: 278 [2020-12-23 13:02:02,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:02:02,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-12-23 13:02:02,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 181. [2020-12-23 13:02:02,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 13:02:02,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 485 transitions. [2020-12-23 13:02:02,279 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 485 transitions. Word has length 14 [2020-12-23 13:02:02,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:02,279 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 485 transitions. [2020-12-23 13:02:02,279 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:02,279 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 485 transitions. [2020-12-23 13:02:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:02,279 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:02,280 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:02,480 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:02,481 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:02,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:02,481 INFO L82 PathProgramCache]: Analyzing trace with hash 525431647, now seen corresponding path program 79 times [2020-12-23 13:02:02,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:02,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207176938] [2020-12-23 13:02:02,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:02,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:02,610 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 13:02:02,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207176938] [2020-12-23 13:02:02,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35414886] [2020-12-23 13:02:02,611 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 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 13:02:02,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:02,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:02,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:02,891 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 13:02:02,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:02,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:02,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615465052] [2020-12-23 13:02:02,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:02,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:02,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:02,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:02,893 INFO L87 Difference]: Start difference. First operand 181 states and 485 transitions. Second operand 18 states. [2020-12-23 13:02:03,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:03,787 INFO L93 Difference]: Finished difference Result 277 states and 677 transitions. [2020-12-23 13:02:03,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:02:03,788 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:03,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:03,789 INFO L225 Difference]: With dead ends: 277 [2020-12-23 13:02:03,789 INFO L226 Difference]: Without dead ends: 275 [2020-12-23 13:02:03,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:02:03,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-23 13:02:03,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 183. [2020-12-23 13:02:03,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-12-23 13:02:03,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 492 transitions. [2020-12-23 13:02:03,793 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 492 transitions. Word has length 14 [2020-12-23 13:02:03,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:03,794 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 492 transitions. [2020-12-23 13:02:03,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:03,794 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 492 transitions. [2020-12-23 13:02:03,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:03,794 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:03,794 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:03,995 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-12-23 13:02:03,995 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:03,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:03,996 INFO L82 PathProgramCache]: Analyzing trace with hash 526035155, now seen corresponding path program 80 times [2020-12-23 13:02:03,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:03,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763191612] [2020-12-23 13:02:03,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:04,123 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 13:02:04,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763191612] [2020-12-23 13:02:04,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680677092] [2020-12-23 13:02:04,124 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 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 13:02:04,187 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:04,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:04,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:04,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:04,425 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 13:02:04,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:04,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:04,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472894789] [2020-12-23 13:02:04,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:04,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:04,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:04,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:04,426 INFO L87 Difference]: Start difference. First operand 183 states and 492 transitions. Second operand 18 states. [2020-12-23 13:02:05,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:05,286 INFO L93 Difference]: Finished difference Result 266 states and 661 transitions. [2020-12-23 13:02:05,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:02:05,287 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:05,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:05,288 INFO L225 Difference]: With dead ends: 266 [2020-12-23 13:02:05,289 INFO L226 Difference]: Without dead ends: 264 [2020-12-23 13:02:05,289 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=407, Invalid=925, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:02:05,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-12-23 13:02:05,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 185. [2020-12-23 13:02:05,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 13:02:05,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 499 transitions. [2020-12-23 13:02:05,293 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 499 transitions. Word has length 14 [2020-12-23 13:02:05,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:05,293 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 499 transitions. [2020-12-23 13:02:05,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:05,293 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 499 transitions. [2020-12-23 13:02:05,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:05,293 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:05,293 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:05,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:05,494 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:05,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:05,495 INFO L82 PathProgramCache]: Analyzing trace with hash 526054623, now seen corresponding path program 81 times [2020-12-23 13:02:05,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:05,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95007667] [2020-12-23 13:02:05,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:05,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:05,621 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 13:02:05,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95007667] [2020-12-23 13:02:05,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090448025] [2020-12-23 13:02:05,622 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 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 13:02:05,696 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:05,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:05,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:05,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:05,897 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:05,929 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:05,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:05,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:05,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210942742] [2020-12-23 13:02:05,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:05,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:05,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:05,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:05,931 INFO L87 Difference]: Start difference. First operand 185 states and 499 transitions. Second operand 18 states. [2020-12-23 13:02:07,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:07,048 INFO L93 Difference]: Finished difference Result 306 states and 754 transitions. [2020-12-23 13:02:07,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 13:02:07,050 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:07,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:07,051 INFO L225 Difference]: With dead ends: 306 [2020-12-23 13:02:07,051 INFO L226 Difference]: Without dead ends: 294 [2020-12-23 13:02:07,051 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=576, Invalid=1316, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 13:02:07,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-12-23 13:02:07,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 186. [2020-12-23 13:02:07,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 13:02:07,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 501 transitions. [2020-12-23 13:02:07,056 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 501 transitions. Word has length 14 [2020-12-23 13:02:07,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:07,057 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 501 transitions. [2020-12-23 13:02:07,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:07,057 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 501 transitions. [2020-12-23 13:02:07,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:07,057 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:07,058 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:07,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-12-23 13:02:07,272 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:07,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:07,272 INFO L82 PathProgramCache]: Analyzing trace with hash 526094737, now seen corresponding path program 82 times [2020-12-23 13:02:07,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:07,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954657744] [2020-12-23 13:02:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:07,401 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 13:02:07,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954657744] [2020-12-23 13:02:07,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695221579] [2020-12-23 13:02:07,402 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 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 13:02:07,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:07,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:07,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:07,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:07,699 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 13:02:07,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:07,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:07,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279126206] [2020-12-23 13:02:07,700 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:07,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:07,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:07,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:07,701 INFO L87 Difference]: Start difference. First operand 186 states and 501 transitions. Second operand 18 states. [2020-12-23 13:02:08,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:08,718 INFO L93 Difference]: Finished difference Result 279 states and 690 transitions. [2020-12-23 13:02:08,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:02:08,719 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:08,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:08,720 INFO L225 Difference]: With dead ends: 279 [2020-12-23 13:02:08,720 INFO L226 Difference]: Without dead ends: 277 [2020-12-23 13:02:08,720 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=406, Invalid=1000, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:02:08,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-12-23 13:02:08,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 189. [2020-12-23 13:02:08,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-23 13:02:08,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 513 transitions. [2020-12-23 13:02:08,724 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 513 transitions. Word has length 14 [2020-12-23 13:02:08,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:08,725 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 513 transitions. [2020-12-23 13:02:08,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:08,725 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 513 transitions. [2020-12-23 13:02:08,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:08,725 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:08,725 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:08,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:08,926 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:08,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:08,927 INFO L82 PathProgramCache]: Analyzing trace with hash 526114205, now seen corresponding path program 83 times [2020-12-23 13:02:08,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:08,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808863719] [2020-12-23 13:02:08,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:08,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:09,060 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 13:02:09,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808863719] [2020-12-23 13:02:09,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1565950860] [2020-12-23 13:02:09,061 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 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 13:02:09,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 13:02:09,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:09,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:09,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:09,338 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:09,340 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:02:09,341 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:09,357 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 13:02:09,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:09,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:09,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977885464] [2020-12-23 13:02:09,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:09,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:09,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:09,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:09,359 INFO L87 Difference]: Start difference. First operand 189 states and 513 transitions. Second operand 17 states. [2020-12-23 13:02:10,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:10,545 INFO L93 Difference]: Finished difference Result 290 states and 731 transitions. [2020-12-23 13:02:10,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 13:02:10,546 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:10,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:10,547 INFO L225 Difference]: With dead ends: 290 [2020-12-23 13:02:10,547 INFO L226 Difference]: Without dead ends: 282 [2020-12-23 13:02:10,548 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 13:02:10,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-12-23 13:02:10,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 189. [2020-12-23 13:02:10,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-23 13:02:10,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 513 transitions. [2020-12-23 13:02:10,551 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 513 transitions. Word has length 14 [2020-12-23 13:02:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:10,552 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 513 transitions. [2020-12-23 13:02:10,552 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 513 transitions. [2020-12-23 13:02:10,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:10,552 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:10,552 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:10,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:10,753 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:10,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:10,754 INFO L82 PathProgramCache]: Analyzing trace with hash 526116127, now seen corresponding path program 84 times [2020-12-23 13:02:10,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:10,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33853555] [2020-12-23 13:02:10,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:10,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:10,888 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 13:02:10,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33853555] [2020-12-23 13:02:10,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49021712] [2020-12-23 13:02:10,889 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 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 13:02:10,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-23 13:02:10,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:10,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:02:10,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:11,152 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:02:11,153 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:02:11,154 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:11,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:11,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:11,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:11,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128298423] [2020-12-23 13:02:11,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:11,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:11,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:11,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:11,175 INFO L87 Difference]: Start difference. First operand 189 states and 513 transitions. Second operand 17 states. [2020-12-23 13:02:12,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:12,588 INFO L93 Difference]: Finished difference Result 302 states and 761 transitions. [2020-12-23 13:02:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 13:02:12,589 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:12,590 INFO L225 Difference]: With dead ends: 302 [2020-12-23 13:02:12,590 INFO L226 Difference]: Without dead ends: 294 [2020-12-23 13:02:12,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 13:02:12,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-12-23 13:02:12,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 184. [2020-12-23 13:02:12,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 13:02:12,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 497 transitions. [2020-12-23 13:02:12,594 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 497 transitions. Word has length 14 [2020-12-23 13:02:12,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:12,595 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 497 transitions. [2020-12-23 13:02:12,595 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:12,595 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 497 transitions. [2020-12-23 13:02:12,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:12,595 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:12,595 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:12,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable110 [2020-12-23 13:02:12,796 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:12,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:12,797 INFO L82 PathProgramCache]: Analyzing trace with hash 563919697, now seen corresponding path program 85 times [2020-12-23 13:02:12,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:12,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350010103] [2020-12-23 13:02:12,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:12,912 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 13:02:12,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350010103] [2020-12-23 13:02:12,912 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045436376] [2020-12-23 13:02:12,913 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 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 13:02:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:12,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:12,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:13,207 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 13:02:13,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:13,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:13,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105472377] [2020-12-23 13:02:13,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:13,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:13,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:13,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:13,209 INFO L87 Difference]: Start difference. First operand 184 states and 497 transitions. Second operand 18 states. [2020-12-23 13:02:14,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:14,167 INFO L93 Difference]: Finished difference Result 297 states and 727 transitions. [2020-12-23 13:02:14,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 13:02:14,168 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:14,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:14,169 INFO L225 Difference]: With dead ends: 297 [2020-12-23 13:02:14,169 INFO L226 Difference]: Without dead ends: 295 [2020-12-23 13:02:14,170 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:02:14,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-12-23 13:02:14,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 184. [2020-12-23 13:02:14,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 13:02:14,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 497 transitions. [2020-12-23 13:02:14,173 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 497 transitions. Word has length 14 [2020-12-23 13:02:14,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:14,173 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 497 transitions. [2020-12-23 13:02:14,173 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:14,173 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 497 transitions. [2020-12-23 13:02:14,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:14,174 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:14,174 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:14,374 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-12-23 13:02:14,375 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:14,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:14,375 INFO L82 PathProgramCache]: Analyzing trace with hash 563981201, now seen corresponding path program 86 times [2020-12-23 13:02:14,376 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:14,376 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961607575] [2020-12-23 13:02:14,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:14,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:14,513 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 13:02:14,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961607575] [2020-12-23 13:02:14,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076854712] [2020-12-23 13:02:14,514 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 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 13:02:14,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:14,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:14,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:14,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:14,800 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 13:02:14,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:14,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:14,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34172941] [2020-12-23 13:02:14,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:14,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:14,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:14,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:14,802 INFO L87 Difference]: Start difference. First operand 184 states and 497 transitions. Second operand 18 states. [2020-12-23 13:02:15,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:15,371 INFO L93 Difference]: Finished difference Result 264 states and 656 transitions. [2020-12-23 13:02:15,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:02:15,372 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:15,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:15,373 INFO L225 Difference]: With dead ends: 264 [2020-12-23 13:02:15,374 INFO L226 Difference]: Without dead ends: 262 [2020-12-23 13:02:15,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=625, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:02:15,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-12-23 13:02:15,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 184. [2020-12-23 13:02:15,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 13:02:15,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 496 transitions. [2020-12-23 13:02:15,380 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 496 transitions. Word has length 14 [2020-12-23 13:02:15,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:15,380 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 496 transitions. [2020-12-23 13:02:15,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:15,380 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 496 transitions. [2020-12-23 13:02:15,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:15,381 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:15,381 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:15,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:15,596 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:15,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:15,596 INFO L82 PathProgramCache]: Analyzing trace with hash 582688027, now seen corresponding path program 87 times [2020-12-23 13:02:15,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:15,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324470099] [2020-12-23 13:02:15,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:15,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:15,695 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 13:02:15,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324470099] [2020-12-23 13:02:15,695 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419588517] [2020-12-23 13:02:15,696 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 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 13:02:15,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:15,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:15,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:15,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:16,027 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 13:02:16,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:16,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:16,028 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788277353] [2020-12-23 13:02:16,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:16,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:16,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:16,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:16,029 INFO L87 Difference]: Start difference. First operand 184 states and 496 transitions. Second operand 18 states. [2020-12-23 13:02:17,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:17,050 INFO L93 Difference]: Finished difference Result 293 states and 716 transitions. [2020-12-23 13:02:17,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-12-23 13:02:17,053 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:17,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:17,054 INFO L225 Difference]: With dead ends: 293 [2020-12-23 13:02:17,054 INFO L226 Difference]: Without dead ends: 291 [2020-12-23 13:02:17,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=380, Invalid=952, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:02:17,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-12-23 13:02:17,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 185. [2020-12-23 13:02:17,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 13:02:17,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 501 transitions. [2020-12-23 13:02:17,059 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 501 transitions. Word has length 14 [2020-12-23 13:02:17,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:17,059 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 501 transitions. [2020-12-23 13:02:17,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:17,060 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 501 transitions. [2020-12-23 13:02:17,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:17,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:17,060 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:17,261 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-12-23 13:02:17,261 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:17,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:17,262 INFO L82 PathProgramCache]: Analyzing trace with hash 583293457, now seen corresponding path program 88 times [2020-12-23 13:02:17,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:17,262 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250740086] [2020-12-23 13:02:17,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:17,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:17,397 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 13:02:17,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250740086] [2020-12-23 13:02:17,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475189556] [2020-12-23 13:02:17,398 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 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 13:02:17,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:17,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:17,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:17,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:17,728 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 13:02:17,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:17,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:17,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116106152] [2020-12-23 13:02:17,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:17,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:17,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:17,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:17,730 INFO L87 Difference]: Start difference. First operand 185 states and 501 transitions. Second operand 18 states. [2020-12-23 13:02:18,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:18,932 INFO L93 Difference]: Finished difference Result 277 states and 692 transitions. [2020-12-23 13:02:18,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:02:18,933 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:18,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:18,935 INFO L225 Difference]: With dead ends: 277 [2020-12-23 13:02:18,935 INFO L226 Difference]: Without dead ends: 275 [2020-12-23 13:02:18,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=446, Invalid=1114, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 13:02:18,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-23 13:02:18,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 188. [2020-12-23 13:02:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-23 13:02:18,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 513 transitions. [2020-12-23 13:02:18,939 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 513 transitions. Word has length 14 [2020-12-23 13:02:18,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:18,939 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 513 transitions. [2020-12-23 13:02:18,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:18,940 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 513 transitions. [2020-12-23 13:02:18,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:18,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:18,940 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:19,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-12-23 13:02:19,141 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:19,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:19,142 INFO L82 PathProgramCache]: Analyzing trace with hash 583314847, now seen corresponding path program 89 times [2020-12-23 13:02:19,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:19,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850942093] [2020-12-23 13:02:19,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:19,277 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 13:02:19,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850942093] [2020-12-23 13:02:19,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139040157] [2020-12-23 13:02:19,277 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 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 13:02:19,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:19,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:19,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:19,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:19,566 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:02:19,569 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:02:19,570 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:02:19,573 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:19,575 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:19,578 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:19,613 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 13:02:19,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:19,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:19,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549690494] [2020-12-23 13:02:19,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:19,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:19,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:19,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:19,615 INFO L87 Difference]: Start difference. First operand 188 states and 513 transitions. Second operand 17 states. [2020-12-23 13:02:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:21,252 INFO L93 Difference]: Finished difference Result 300 states and 753 transitions. [2020-12-23 13:02:21,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 13:02:21,253 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:21,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:21,254 INFO L225 Difference]: With dead ends: 300 [2020-12-23 13:02:21,254 INFO L226 Difference]: Without dead ends: 292 [2020-12-23 13:02:21,255 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-12-23 13:02:21,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-12-23 13:02:21,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 184. [2020-12-23 13:02:21,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 13:02:21,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 496 transitions. [2020-12-23 13:02:21,259 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 496 transitions. Word has length 14 [2020-12-23 13:02:21,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:21,259 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 496 transitions. [2020-12-23 13:02:21,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:21,260 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 496 transitions. [2020-12-23 13:02:21,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:21,260 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:21,260 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:21,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-12-23 13:02:21,461 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:21,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:21,462 INFO L82 PathProgramCache]: Analyzing trace with hash 584536991, now seen corresponding path program 90 times [2020-12-23 13:02:21,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:21,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363047868] [2020-12-23 13:02:21,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:21,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:21,584 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 13:02:21,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363047868] [2020-12-23 13:02:21,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788039157] [2020-12-23 13:02:21,585 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 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 13:02:21,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:21,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:21,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:21,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:21,867 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 13:02:21,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:21,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:21,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19367661] [2020-12-23 13:02:21,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:21,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:21,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:21,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:21,869 INFO L87 Difference]: Start difference. First operand 184 states and 496 transitions. Second operand 18 states. [2020-12-23 13:02:22,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:22,594 INFO L93 Difference]: Finished difference Result 265 states and 658 transitions. [2020-12-23 13:02:22,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:02:22,595 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:22,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:22,597 INFO L225 Difference]: With dead ends: 265 [2020-12-23 13:02:22,597 INFO L226 Difference]: Without dead ends: 263 [2020-12-23 13:02:22,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:02:22,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-12-23 13:02:22,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 186. [2020-12-23 13:02:22,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 13:02:22,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 503 transitions. [2020-12-23 13:02:22,601 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 503 transitions. Word has length 14 [2020-12-23 13:02:22,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:22,601 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 503 transitions. [2020-12-23 13:02:22,601 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:22,601 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 503 transitions. [2020-12-23 13:02:22,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:22,602 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:22,602 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:22,802 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:22,803 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:22,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:22,803 INFO L82 PathProgramCache]: Analyzing trace with hash 585200081, now seen corresponding path program 91 times [2020-12-23 13:02:22,804 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:22,804 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068801826] [2020-12-23 13:02:22,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:22,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:22,949 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 13:02:22,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068801826] [2020-12-23 13:02:22,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248813049] [2020-12-23 13:02:22,949 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 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 13:02:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:23,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:23,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:23,202 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 13:02:23,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:23,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:23,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699685759] [2020-12-23 13:02:23,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:23,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:23,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:23,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:23,204 INFO L87 Difference]: Start difference. First operand 186 states and 503 transitions. Second operand 18 states. [2020-12-23 13:02:23,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:23,949 INFO L93 Difference]: Finished difference Result 257 states and 642 transitions. [2020-12-23 13:02:23,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:02:23,950 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:23,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:23,951 INFO L225 Difference]: With dead ends: 257 [2020-12-23 13:02:23,951 INFO L226 Difference]: Without dead ends: 255 [2020-12-23 13:02:23,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:02:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-12-23 13:02:23,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 188. [2020-12-23 13:02:23,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-23 13:02:23,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 510 transitions. [2020-12-23 13:02:23,954 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 510 transitions. Word has length 14 [2020-12-23 13:02:23,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:23,955 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 510 transitions. [2020-12-23 13:02:23,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:23,955 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 510 transitions. [2020-12-23 13:02:23,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:23,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:23,955 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:24,156 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-12-23 13:02:24,156 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:24,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:24,157 INFO L82 PathProgramCache]: Analyzing trace with hash 585219549, now seen corresponding path program 92 times [2020-12-23 13:02:24,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:24,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098868595] [2020-12-23 13:02:24,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:24,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:24,302 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 13:02:24,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098868595] [2020-12-23 13:02:24,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917314310] [2020-12-23 13:02:24,303 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 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 13:02:24,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:24,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:24,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:24,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:24,576 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:24,593 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 13:02:24,593 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:24,593 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:24,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439693155] [2020-12-23 13:02:24,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:24,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:24,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:24,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:24,595 INFO L87 Difference]: Start difference. First operand 188 states and 510 transitions. Second operand 17 states. [2020-12-23 13:02:25,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:25,562 INFO L93 Difference]: Finished difference Result 282 states and 704 transitions. [2020-12-23 13:02:25,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:02:25,563 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:25,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:25,564 INFO L225 Difference]: With dead ends: 282 [2020-12-23 13:02:25,564 INFO L226 Difference]: Without dead ends: 274 [2020-12-23 13:02:25,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:02:25,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-12-23 13:02:25,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 187. [2020-12-23 13:02:25,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 13:02:25,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 509 transitions. [2020-12-23 13:02:25,568 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 509 transitions. Word has length 14 [2020-12-23 13:02:25,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:25,568 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 509 transitions. [2020-12-23 13:02:25,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:25,568 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 509 transitions. [2020-12-23 13:02:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:25,569 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:25,569 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:25,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-12-23 13:02:25,770 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:25,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:25,770 INFO L82 PathProgramCache]: Analyzing trace with hash 585221471, now seen corresponding path program 93 times [2020-12-23 13:02:25,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:25,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414281405] [2020-12-23 13:02:25,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:25,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:25,884 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 13:02:25,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414281405] [2020-12-23 13:02:25,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074634295] [2020-12-23 13:02:25,884 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 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 13:02:25,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:25,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:25,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:25,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:26,157 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 13:02:26,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:26,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:26,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016683018] [2020-12-23 13:02:26,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:26,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:26,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:26,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:26,159 INFO L87 Difference]: Start difference. First operand 187 states and 509 transitions. Second operand 17 states. [2020-12-23 13:02:26,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:26,990 INFO L93 Difference]: Finished difference Result 273 states and 683 transitions. [2020-12-23 13:02:26,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:02:26,991 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:26,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:26,992 INFO L225 Difference]: With dead ends: 273 [2020-12-23 13:02:26,992 INFO L226 Difference]: Without dead ends: 265 [2020-12-23 13:02:26,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=380, Invalid=880, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:02:26,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-23 13:02:26,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 181. [2020-12-23 13:02:26,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 13:02:26,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 490 transitions. [2020-12-23 13:02:26,996 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 490 transitions. Word has length 14 [2020-12-23 13:02:26,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:26,996 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 490 transitions. [2020-12-23 13:02:26,996 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 490 transitions. [2020-12-23 13:02:26,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:26,997 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:26,997 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:27,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:27,198 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:27,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:27,198 INFO L82 PathProgramCache]: Analyzing trace with hash 1128994707, now seen corresponding path program 94 times [2020-12-23 13:02:27,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:27,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371436516] [2020-12-23 13:02:27,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:27,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:27,339 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 13:02:27,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371436516] [2020-12-23 13:02:27,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034462782] [2020-12-23 13:02:27,340 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 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 13:02:27,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:27,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:27,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:27,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:27,653 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 13:02:27,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:27,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:27,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561067613] [2020-12-23 13:02:27,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:27,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:27,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:27,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:27,655 INFO L87 Difference]: Start difference. First operand 181 states and 490 transitions. Second operand 18 states. [2020-12-23 13:02:28,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:28,060 INFO L93 Difference]: Finished difference Result 250 states and 633 transitions. [2020-12-23 13:02:28,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:02:28,061 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:28,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:28,062 INFO L225 Difference]: With dead ends: 250 [2020-12-23 13:02:28,062 INFO L226 Difference]: Without dead ends: 248 [2020-12-23 13:02:28,062 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=194, Invalid=406, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:02:28,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-12-23 13:02:28,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 185. [2020-12-23 13:02:28,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 13:02:28,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 501 transitions. [2020-12-23 13:02:28,067 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 501 transitions. Word has length 14 [2020-12-23 13:02:28,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:28,067 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 501 transitions. [2020-12-23 13:02:28,067 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:28,067 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 501 transitions. [2020-12-23 13:02:28,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:28,067 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:28,068 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:28,268 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:28,268 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:28,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:28,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1129054289, now seen corresponding path program 95 times [2020-12-23 13:02:28,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:28,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280999299] [2020-12-23 13:02:28,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:28,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:28,417 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 13:02:28,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280999299] [2020-12-23 13:02:28,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882124328] [2020-12-23 13:02:28,418 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 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 13:02:28,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:28,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:28,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:28,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:28,754 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 13:02:28,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:28,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:28,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313164441] [2020-12-23 13:02:28,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:28,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:28,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:28,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:28,755 INFO L87 Difference]: Start difference. First operand 185 states and 501 transitions. Second operand 18 states. [2020-12-23 13:02:29,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:29,338 INFO L93 Difference]: Finished difference Result 256 states and 644 transitions. [2020-12-23 13:02:29,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:02:29,339 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:29,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:29,340 INFO L225 Difference]: With dead ends: 256 [2020-12-23 13:02:29,340 INFO L226 Difference]: Without dead ends: 254 [2020-12-23 13:02:29,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=249, Invalid=507, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:02:29,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-12-23 13:02:29,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 187. [2020-12-23 13:02:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 13:02:29,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 506 transitions. [2020-12-23 13:02:29,344 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 506 transitions. Word has length 14 [2020-12-23 13:02:29,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:29,344 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 506 transitions. [2020-12-23 13:02:29,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:29,345 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 506 transitions. [2020-12-23 13:02:29,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:29,345 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:29,345 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:29,545 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:29,546 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:29,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:29,547 INFO L82 PathProgramCache]: Analyzing trace with hash 1130839827, now seen corresponding path program 96 times [2020-12-23 13:02:29,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:29,547 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083569278] [2020-12-23 13:02:29,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:29,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:29,666 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 13:02:29,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083569278] [2020-12-23 13:02:29,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103146832] [2020-12-23 13:02:29,667 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 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 13:02:29,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:29,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:29,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:29,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:29,967 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 13:02:29,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:29,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:29,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327655180] [2020-12-23 13:02:29,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:29,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:29,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:29,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:29,968 INFO L87 Difference]: Start difference. First operand 187 states and 506 transitions. Second operand 18 states. [2020-12-23 13:02:30,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:30,449 INFO L93 Difference]: Finished difference Result 253 states and 638 transitions. [2020-12-23 13:02:30,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:02:30,450 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:30,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:30,451 INFO L225 Difference]: With dead ends: 253 [2020-12-23 13:02:30,451 INFO L226 Difference]: Without dead ends: 251 [2020-12-23 13:02:30,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=215, Invalid=435, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:02:30,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-12-23 13:02:30,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 189. [2020-12-23 13:02:30,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-23 13:02:30,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 511 transitions. [2020-12-23 13:02:30,455 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 511 transitions. Word has length 14 [2020-12-23 13:02:30,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:30,455 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 511 transitions. [2020-12-23 13:02:30,455 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:30,455 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 511 transitions. [2020-12-23 13:02:30,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:30,456 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:30,456 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:30,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:30,657 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:30,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:30,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1130841749, now seen corresponding path program 97 times [2020-12-23 13:02:30,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:30,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213091045] [2020-12-23 13:02:30,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:30,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:30,807 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 13:02:30,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213091045] [2020-12-23 13:02:30,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6664544] [2020-12-23 13:02:30,807 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 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 13:02:30,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:30,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:30,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:31,079 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 13:02:31,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:31,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:31,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434693947] [2020-12-23 13:02:31,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:31,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:31,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:31,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=212, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:31,081 INFO L87 Difference]: Start difference. First operand 189 states and 511 transitions. Second operand 18 states. [2020-12-23 13:02:31,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:31,521 INFO L93 Difference]: Finished difference Result 255 states and 643 transitions. [2020-12-23 13:02:31,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-23 13:02:31,522 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:31,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:31,524 INFO L225 Difference]: With dead ends: 255 [2020-12-23 13:02:31,524 INFO L226 Difference]: Without dead ends: 253 [2020-12-23 13:02:31,524 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=431, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:02:31,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-12-23 13:02:31,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 187. [2020-12-23 13:02:31,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 13:02:31,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 505 transitions. [2020-12-23 13:02:31,527 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 505 transitions. Word has length 14 [2020-12-23 13:02:31,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:31,528 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 505 transitions. [2020-12-23 13:02:31,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:31,528 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 505 transitions. [2020-12-23 13:02:31,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:31,528 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:31,528 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:31,729 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-12-23 13:02:31,729 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:31,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:31,730 INFO L82 PathProgramCache]: Analyzing trace with hash 1186310669, now seen corresponding path program 98 times [2020-12-23 13:02:31,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:31,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026510469] [2020-12-23 13:02:31,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:31,875 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 13:02:31,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026510469] [2020-12-23 13:02:31,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092723604] [2020-12-23 13:02:31,876 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 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 13:02:31,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:31,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:31,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:31,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:32,262 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 13:02:32,262 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:32,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:32,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852686923] [2020-12-23 13:02:32,263 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:32,263 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:32,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:32,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=209, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:32,263 INFO L87 Difference]: Start difference. First operand 187 states and 505 transitions. Second operand 18 states. [2020-12-23 13:02:32,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:32,682 INFO L93 Difference]: Finished difference Result 252 states and 634 transitions. [2020-12-23 13:02:32,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-23 13:02:32,684 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:32,685 INFO L225 Difference]: With dead ends: 252 [2020-12-23 13:02:32,685 INFO L226 Difference]: Without dead ends: 250 [2020-12-23 13:02:32,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=396, Unknown=0, NotChecked=0, Total=600 [2020-12-23 13:02:32,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-12-23 13:02:32,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 186. [2020-12-23 13:02:32,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 13:02:32,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 501 transitions. [2020-12-23 13:02:32,690 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 501 transitions. Word has length 14 [2020-12-23 13:02:32,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:32,690 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 501 transitions. [2020-12-23 13:02:32,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:32,690 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 501 transitions. [2020-12-23 13:02:32,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:32,691 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:32,691 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:32,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-12-23 13:02:32,900 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:32,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:32,901 INFO L82 PathProgramCache]: Analyzing trace with hash 1733566455, now seen corresponding path program 99 times [2020-12-23 13:02:32,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:32,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872370450] [2020-12-23 13:02:32,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:33,041 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 13:02:33,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872370450] [2020-12-23 13:02:33,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221694653] [2020-12-23 13:02:33,042 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 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 13:02:33,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:33,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:33,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:33,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:33,367 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 13:02:33,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:33,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:33,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047881952] [2020-12-23 13:02:33,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:33,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:33,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:33,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:33,369 INFO L87 Difference]: Start difference. First operand 186 states and 501 transitions. Second operand 18 states. [2020-12-23 13:02:33,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:33,872 INFO L93 Difference]: Finished difference Result 268 states and 669 transitions. [2020-12-23 13:02:33,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:02:33,873 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:33,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:33,874 INFO L225 Difference]: With dead ends: 268 [2020-12-23 13:02:33,875 INFO L226 Difference]: Without dead ends: 266 [2020-12-23 13:02:33,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=489, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:02:33,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-23 13:02:33,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 188. [2020-12-23 13:02:33,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-23 13:02:33,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 507 transitions. [2020-12-23 13:02:33,879 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 507 transitions. Word has length 14 [2020-12-23 13:02:33,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:33,879 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 507 transitions. [2020-12-23 13:02:33,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:33,879 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 507 transitions. [2020-12-23 13:02:33,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:33,879 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:33,879 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:34,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-12-23 13:02:34,080 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:34,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1733626037, now seen corresponding path program 100 times [2020-12-23 13:02:34,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:34,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402935429] [2020-12-23 13:02:34,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:34,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:34,209 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 13:02:34,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402935429] [2020-12-23 13:02:34,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306159818] [2020-12-23 13:02:34,209 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 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 13:02:34,269 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:34,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:34,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:34,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:34,542 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 13:02:34,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:34,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:34,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849726328] [2020-12-23 13:02:34,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:34,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:34,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:34,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:34,544 INFO L87 Difference]: Start difference. First operand 188 states and 507 transitions. Second operand 18 states. [2020-12-23 13:02:35,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:35,233 INFO L93 Difference]: Finished difference Result 277 states and 685 transitions. [2020-12-23 13:02:35,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:02:35,234 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:35,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:35,235 INFO L225 Difference]: With dead ends: 277 [2020-12-23 13:02:35,236 INFO L226 Difference]: Without dead ends: 275 [2020-12-23 13:02:35,236 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=266, Invalid=604, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:02:35,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2020-12-23 13:02:35,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 190. [2020-12-23 13:02:35,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-23 13:02:35,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 512 transitions. [2020-12-23 13:02:35,239 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 512 transitions. Word has length 14 [2020-12-23 13:02:35,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:35,239 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 512 transitions. [2020-12-23 13:02:35,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:35,240 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 512 transitions. [2020-12-23 13:02:35,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:35,240 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:35,240 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:35,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:35,443 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:35,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:35,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1735411575, now seen corresponding path program 101 times [2020-12-23 13:02:35,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:35,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173469892] [2020-12-23 13:02:35,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:35,584 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 13:02:35,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173469892] [2020-12-23 13:02:35,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615039547] [2020-12-23 13:02:35,585 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 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 13:02:35,655 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:35,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:35,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:35,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:35,871 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 13:02:35,871 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:35,871 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:35,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77947507] [2020-12-23 13:02:35,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:35,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:35,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:35,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:35,874 INFO L87 Difference]: Start difference. First operand 190 states and 512 transitions. Second operand 18 states. [2020-12-23 13:02:36,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:36,531 INFO L93 Difference]: Finished difference Result 272 states and 675 transitions. [2020-12-23 13:02:36,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:02:36,533 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:36,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:36,534 INFO L225 Difference]: With dead ends: 272 [2020-12-23 13:02:36,534 INFO L226 Difference]: Without dead ends: 270 [2020-12-23 13:02:36,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=270, Invalid=600, Unknown=0, NotChecked=0, Total=870 [2020-12-23 13:02:36,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-12-23 13:02:36,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 192. [2020-12-23 13:02:36,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-12-23 13:02:36,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 517 transitions. [2020-12-23 13:02:36,541 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 517 transitions. Word has length 14 [2020-12-23 13:02:36,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:36,541 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 517 transitions. [2020-12-23 13:02:36,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:36,541 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 517 transitions. [2020-12-23 13:02:36,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:36,542 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:36,542 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:36,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-12-23 13:02:36,744 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:36,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:36,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1735413497, now seen corresponding path program 102 times [2020-12-23 13:02:36,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:36,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472352876] [2020-12-23 13:02:36,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:36,888 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 13:02:36,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472352876] [2020-12-23 13:02:36,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686584519] [2020-12-23 13:02:36,889 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 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 13:02:36,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:36,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:36,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:36,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:37,169 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 13:02:37,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:37,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:37,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325063423] [2020-12-23 13:02:37,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:37,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:37,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:37,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=228, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:37,171 INFO L87 Difference]: Start difference. First operand 192 states and 517 transitions. Second operand 18 states. [2020-12-23 13:02:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:37,725 INFO L93 Difference]: Finished difference Result 270 states and 674 transitions. [2020-12-23 13:02:37,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:02:37,726 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:37,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:37,727 INFO L225 Difference]: With dead ends: 270 [2020-12-23 13:02:37,727 INFO L226 Difference]: Without dead ends: 268 [2020-12-23 13:02:37,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=241, Invalid=515, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:02:37,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-12-23 13:02:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 190. [2020-12-23 13:02:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-23 13:02:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 511 transitions. [2020-12-23 13:02:37,732 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 511 transitions. Word has length 14 [2020-12-23 13:02:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:37,732 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 511 transitions. [2020-12-23 13:02:37,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:37,733 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 511 transitions. [2020-12-23 13:02:37,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:37,733 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:37,733 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:37,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:37,934 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:37,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:37,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1790882417, now seen corresponding path program 103 times [2020-12-23 13:02:37,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:37,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639582907] [2020-12-23 13:02:37,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:37,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:38,082 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 13:02:38,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639582907] [2020-12-23 13:02:38,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914960064] [2020-12-23 13:02:38,082 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 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 13:02:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:38,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:38,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:38,477 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 13:02:38,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:38,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:38,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092336600] [2020-12-23 13:02:38,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:38,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:38,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:38,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:38,478 INFO L87 Difference]: Start difference. First operand 190 states and 511 transitions. Second operand 18 states. [2020-12-23 13:02:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:39,052 INFO L93 Difference]: Finished difference Result 267 states and 665 transitions. [2020-12-23 13:02:39,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:02:39,053 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:39,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:39,055 INFO L225 Difference]: With dead ends: 267 [2020-12-23 13:02:39,055 INFO L226 Difference]: Without dead ends: 265 [2020-12-23 13:02:39,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=226, Invalid=476, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:02:39,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-12-23 13:02:39,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 184. [2020-12-23 13:02:39,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 13:02:39,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 496 transitions. [2020-12-23 13:02:39,059 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 496 transitions. Word has length 14 [2020-12-23 13:02:39,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:39,059 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 496 transitions. [2020-12-23 13:02:39,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:39,059 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 496 transitions. [2020-12-23 13:02:39,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:39,059 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:39,059 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:39,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-12-23 13:02:39,260 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:39,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:39,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1704904895, now seen corresponding path program 104 times [2020-12-23 13:02:39,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:39,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860449811] [2020-12-23 13:02:39,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:39,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:39,399 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 13:02:39,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860449811] [2020-12-23 13:02:39,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214868003] [2020-12-23 13:02:39,400 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 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 13:02:39,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:39,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:39,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:39,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:39,765 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 13:02:39,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:39,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:39,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033617944] [2020-12-23 13:02:39,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:39,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:39,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:39,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:39,767 INFO L87 Difference]: Start difference. First operand 184 states and 496 transitions. Second operand 18 states. [2020-12-23 13:02:40,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:40,294 INFO L93 Difference]: Finished difference Result 262 states and 652 transitions. [2020-12-23 13:02:40,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-23 13:02:40,295 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:40,296 INFO L225 Difference]: With dead ends: 262 [2020-12-23 13:02:40,296 INFO L226 Difference]: Without dead ends: 260 [2020-12-23 13:02:40,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=512, Unknown=0, NotChecked=0, Total=702 [2020-12-23 13:02:40,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-12-23 13:02:40,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 185. [2020-12-23 13:02:40,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 13:02:40,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 499 transitions. [2020-12-23 13:02:40,301 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 499 transitions. Word has length 14 [2020-12-23 13:02:40,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:40,301 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 499 transitions. [2020-12-23 13:02:40,301 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:40,301 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 499 transitions. [2020-12-23 13:02:40,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:40,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:40,301 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:40,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:40,502 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:40,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:40,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1704845313, now seen corresponding path program 105 times [2020-12-23 13:02:40,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:40,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800030289] [2020-12-23 13:02:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:40,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:40,651 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 13:02:40,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800030289] [2020-12-23 13:02:40,652 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691702807] [2020-12-23 13:02:40,652 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:02:40,724 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:40,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:40,725 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:40,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:41,047 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 13:02:41,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:41,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:41,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946253388] [2020-12-23 13:02:41,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:41,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:41,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:41,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:41,049 INFO L87 Difference]: Start difference. First operand 185 states and 499 transitions. Second operand 18 states. [2020-12-23 13:02:41,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:41,824 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-12-23 13:02:41,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:02:41,825 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:41,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:41,826 INFO L225 Difference]: With dead ends: 289 [2020-12-23 13:02:41,826 INFO L226 Difference]: Without dead ends: 287 [2020-12-23 13:02:41,826 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:02:41,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-12-23 13:02:41,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 186. [2020-12-23 13:02:41,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 13:02:41,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 501 transitions. [2020-12-23 13:02:41,830 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 501 transitions. Word has length 14 [2020-12-23 13:02:41,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:41,831 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 501 transitions. [2020-12-23 13:02:41,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:41,831 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 501 transitions. [2020-12-23 13:02:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:41,831 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:41,831 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:42,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable131 [2020-12-23 13:02:42,033 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:42,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:42,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1703059775, now seen corresponding path program 106 times [2020-12-23 13:02:42,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:42,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78751347] [2020-12-23 13:02:42,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:42,205 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 13:02:42,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78751347] [2020-12-23 13:02:42,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925806792] [2020-12-23 13:02:42,206 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 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 13:02:42,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:42,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:42,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:42,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:42,595 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 13:02:42,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:42,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:42,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005033634] [2020-12-23 13:02:42,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:42,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:42,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:42,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:42,597 INFO L87 Difference]: Start difference. First operand 186 states and 501 transitions. Second operand 18 states. [2020-12-23 13:02:43,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:43,276 INFO L93 Difference]: Finished difference Result 269 states and 662 transitions. [2020-12-23 13:02:43,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:02:43,277 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:43,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:43,278 INFO L225 Difference]: With dead ends: 269 [2020-12-23 13:02:43,279 INFO L226 Difference]: Without dead ends: 267 [2020-12-23 13:02:43,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=213, Invalid=543, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:02:43,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-12-23 13:02:43,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 188. [2020-12-23 13:02:43,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-23 13:02:43,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 506 transitions. [2020-12-23 13:02:43,283 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 506 transitions. Word has length 14 [2020-12-23 13:02:43,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:43,283 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 506 transitions. [2020-12-23 13:02:43,283 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:43,283 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 506 transitions. [2020-12-23 13:02:43,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:43,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:43,283 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:43,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:43,484 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:43,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:43,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1703057853, now seen corresponding path program 107 times [2020-12-23 13:02:43,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:43,485 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383892446] [2020-12-23 13:02:43,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:43,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:43,642 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 13:02:43,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383892446] [2020-12-23 13:02:43,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434046325] [2020-12-23 13:02:43,643 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 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 13:02:43,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:43,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:43,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:43,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:44,024 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 13:02:44,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:44,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:44,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341345504] [2020-12-23 13:02:44,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:44,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:44,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:44,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:44,026 INFO L87 Difference]: Start difference. First operand 188 states and 506 transitions. Second operand 18 states. [2020-12-23 13:02:44,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:44,644 INFO L93 Difference]: Finished difference Result 271 states and 667 transitions. [2020-12-23 13:02:44,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:02:44,646 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:44,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:44,647 INFO L225 Difference]: With dead ends: 271 [2020-12-23 13:02:44,647 INFO L226 Difference]: Without dead ends: 269 [2020-12-23 13:02:44,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:02:44,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-23 13:02:44,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 186. [2020-12-23 13:02:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 13:02:44,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 500 transitions. [2020-12-23 13:02:44,651 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 500 transitions. Word has length 14 [2020-12-23 13:02:44,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:44,651 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 500 transitions. [2020-12-23 13:02:44,651 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 500 transitions. [2020-12-23 13:02:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:44,652 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:44,652 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:44,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-12-23 13:02:44,853 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:44,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:44,854 INFO L82 PathProgramCache]: Analyzing trace with hash -1123086665, now seen corresponding path program 108 times [2020-12-23 13:02:44,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:44,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477213956] [2020-12-23 13:02:44,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:44,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:45,001 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 13:02:45,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477213956] [2020-12-23 13:02:45,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838987220] [2020-12-23 13:02:45,002 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 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 13:02:45,078 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:45,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:45,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:45,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:45,378 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 13:02:45,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:45,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:45,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907975742] [2020-12-23 13:02:45,380 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:45,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:45,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:45,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:45,380 INFO L87 Difference]: Start difference. First operand 186 states and 500 transitions. Second operand 18 states. [2020-12-23 13:02:46,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:46,013 INFO L93 Difference]: Finished difference Result 275 states and 671 transitions. [2020-12-23 13:02:46,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:02:46,014 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:46,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:46,015 INFO L225 Difference]: With dead ends: 275 [2020-12-23 13:02:46,015 INFO L226 Difference]: Without dead ends: 273 [2020-12-23 13:02:46,015 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=589, Unknown=0, NotChecked=0, Total=812 [2020-12-23 13:02:46,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2020-12-23 13:02:46,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 186. [2020-12-23 13:02:46,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-12-23 13:02:46,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 500 transitions. [2020-12-23 13:02:46,019 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 500 transitions. Word has length 14 [2020-12-23 13:02:46,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:46,019 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 500 transitions. [2020-12-23 13:02:46,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:46,019 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 500 transitions. [2020-12-23 13:02:46,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:46,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:46,020 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:46,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-12-23 13:02:46,221 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:46,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:46,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1123027083, now seen corresponding path program 109 times [2020-12-23 13:02:46,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:46,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037979749] [2020-12-23 13:02:46,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:46,340 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 13:02:46,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037979749] [2020-12-23 13:02:46,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907160498] [2020-12-23 13:02:46,341 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 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 13:02:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:46,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:46,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:46,709 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 13:02:46,709 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:46,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:46,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746608681] [2020-12-23 13:02:46,710 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:46,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:46,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:46,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:46,711 INFO L87 Difference]: Start difference. First operand 186 states and 500 transitions. Second operand 18 states. [2020-12-23 13:02:47,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:47,830 INFO L93 Difference]: Finished difference Result 300 states and 725 transitions. [2020-12-23 13:02:47,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:02:47,831 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:47,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:47,833 INFO L225 Difference]: With dead ends: 300 [2020-12-23 13:02:47,833 INFO L226 Difference]: Without dead ends: 298 [2020-12-23 13:02:47,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2020-12-23 13:02:47,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-12-23 13:02:47,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 187. [2020-12-23 13:02:47,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 13:02:47,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 504 transitions. [2020-12-23 13:02:47,839 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 504 transitions. Word has length 14 [2020-12-23 13:02:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:47,840 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 504 transitions. [2020-12-23 13:02:47,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:47,840 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 504 transitions. [2020-12-23 13:02:47,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:47,841 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:47,841 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:48,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-12-23 13:02:48,055 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:48,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:48,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1104318335, now seen corresponding path program 110 times [2020-12-23 13:02:48,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:48,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029006461] [2020-12-23 13:02:48,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:48,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:48,218 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 13:02:48,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029006461] [2020-12-23 13:02:48,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556207381] [2020-12-23 13:02:48,220 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 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 13:02:48,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:48,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:48,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:48,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:48,571 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:02:48,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:48,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:48,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128849841] [2020-12-23 13:02:48,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:48,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:48,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:48,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:48,573 INFO L87 Difference]: Start difference. First operand 187 states and 504 transitions. Second operand 18 states. [2020-12-23 13:02:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:49,391 INFO L93 Difference]: Finished difference Result 272 states and 670 transitions. [2020-12-23 13:02:49,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:02:49,393 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:49,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:49,394 INFO L225 Difference]: With dead ends: 272 [2020-12-23 13:02:49,394 INFO L226 Difference]: Without dead ends: 270 [2020-12-23 13:02:49,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:02:49,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-12-23 13:02:49,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 189. [2020-12-23 13:02:49,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2020-12-23 13:02:49,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 511 transitions. [2020-12-23 13:02:49,398 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 511 transitions. Word has length 14 [2020-12-23 13:02:49,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:49,398 INFO L481 AbstractCegarLoop]: Abstraction has 189 states and 511 transitions. [2020-12-23 13:02:49,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:49,398 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 511 transitions. [2020-12-23 13:02:49,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:49,398 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:49,398 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:49,599 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:49,600 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:49,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:49,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1103655245, now seen corresponding path program 111 times [2020-12-23 13:02:49,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:49,601 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087272471] [2020-12-23 13:02:49,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:49,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:49,751 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 13:02:49,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087272471] [2020-12-23 13:02:49,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270634341] [2020-12-23 13:02:49,752 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 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 13:02:49,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:02:49,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:49,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:49,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:50,113 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 13:02:50,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:50,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:50,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108217893] [2020-12-23 13:02:50,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:50,115 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:50,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:50,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:50,115 INFO L87 Difference]: Start difference. First operand 189 states and 511 transitions. Second operand 18 states. [2020-12-23 13:02:51,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:51,146 INFO L93 Difference]: Finished difference Result 286 states and 708 transitions. [2020-12-23 13:02:51,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:02:51,148 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:51,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:51,149 INFO L225 Difference]: With dead ends: 286 [2020-12-23 13:02:51,150 INFO L226 Difference]: Without dead ends: 284 [2020-12-23 13:02:51,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=320, Invalid=802, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:02:51,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-12-23 13:02:51,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 191. [2020-12-23 13:02:51,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-23 13:02:51,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 518 transitions. [2020-12-23 13:02:51,154 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 518 transitions. Word has length 14 [2020-12-23 13:02:51,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:51,154 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 518 transitions. [2020-12-23 13:02:51,154 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:51,154 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 518 transitions. [2020-12-23 13:02:51,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:51,155 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:51,155 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:51,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:51,355 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:51,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:51,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1103635777, now seen corresponding path program 112 times [2020-12-23 13:02:51,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:51,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546491886] [2020-12-23 13:02:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:51,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:51,481 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 13:02:51,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546491886] [2020-12-23 13:02:51,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35896319] [2020-12-23 13:02:51,482 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 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 13:02:51,545 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:02:51,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:51,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:51,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:51,795 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:51,797 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:02:51,798 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:51,820 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 13:02:51,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:51,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:51,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585342856] [2020-12-23 13:02:51,821 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:51,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:51,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:51,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:51,822 INFO L87 Difference]: Start difference. First operand 191 states and 518 transitions. Second operand 17 states. [2020-12-23 13:02:53,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:53,170 INFO L93 Difference]: Finished difference Result 319 states and 796 transitions. [2020-12-23 13:02:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:02:53,172 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:53,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:53,173 INFO L225 Difference]: With dead ends: 319 [2020-12-23 13:02:53,173 INFO L226 Difference]: Without dead ends: 311 [2020-12-23 13:02:53,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:02:53,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-12-23 13:02:53,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 191. [2020-12-23 13:02:53,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-23 13:02:53,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 518 transitions. [2020-12-23 13:02:53,177 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 518 transitions. Word has length 14 [2020-12-23 13:02:53,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:53,177 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 518 transitions. [2020-12-23 13:02:53,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:53,177 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 518 transitions. [2020-12-23 13:02:53,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:53,178 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:53,178 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:53,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-12-23 13:02:53,379 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:53,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:53,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1103633855, now seen corresponding path program 113 times [2020-12-23 13:02:53,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:53,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524572589] [2020-12-23 13:02:53,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:53,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:53,512 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 13:02:53,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524572589] [2020-12-23 13:02:53,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119109709] [2020-12-23 13:02:53,512 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 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 13:02:53,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:02:53,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:53,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:53,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:53,827 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:02:53,829 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:02:53,830 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:02:53,852 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 13:02:53,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:53,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:02:53,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168246730] [2020-12-23 13:02:53,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:02:53,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:53,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:02:53,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:02:53,854 INFO L87 Difference]: Start difference. First operand 191 states and 518 transitions. Second operand 17 states. [2020-12-23 13:02:55,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:55,279 INFO L93 Difference]: Finished difference Result 317 states and 791 transitions. [2020-12-23 13:02:55,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:02:55,280 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:02:55,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:55,281 INFO L225 Difference]: With dead ends: 317 [2020-12-23 13:02:55,281 INFO L226 Difference]: Without dead ends: 309 [2020-12-23 13:02:55,282 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 13:02:55,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-12-23 13:02:55,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 187. [2020-12-23 13:02:55,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 13:02:55,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 504 transitions. [2020-12-23 13:02:55,285 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 504 transitions. Word has length 14 [2020-12-23 13:02:55,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:55,285 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 504 transitions. [2020-12-23 13:02:55,285 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:02:55,285 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 504 transitions. [2020-12-23 13:02:55,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:55,286 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:55,286 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:55,486 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-12-23 13:02:55,487 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:55,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:55,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1102471293, now seen corresponding path program 114 times [2020-12-23 13:02:55,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:55,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222628442] [2020-12-23 13:02:55,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:55,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:55,649 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 13:02:55,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222628442] [2020-12-23 13:02:55,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [47807501] [2020-12-23 13:02:55,650 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 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 13:02:55,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:02:55,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:55,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:55,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:56,036 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 13:02:56,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:56,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:56,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766073551] [2020-12-23 13:02:56,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:56,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:56,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:56,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:56,038 INFO L87 Difference]: Start difference. First operand 187 states and 504 transitions. Second operand 18 states. [2020-12-23 13:02:57,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:57,493 INFO L93 Difference]: Finished difference Result 315 states and 757 transitions. [2020-12-23 13:02:57,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 13:02:57,495 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:57,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:57,496 INFO L225 Difference]: With dead ends: 315 [2020-12-23 13:02:57,496 INFO L226 Difference]: Without dead ends: 313 [2020-12-23 13:02:57,497 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=446, Invalid=1114, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 13:02:57,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-12-23 13:02:57,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 190. [2020-12-23 13:02:57,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 190 states. [2020-12-23 13:02:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 516 transitions. [2020-12-23 13:02:57,501 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 516 transitions. Word has length 14 [2020-12-23 13:02:57,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:57,501 INFO L481 AbstractCegarLoop]: Abstraction has 190 states and 516 transitions. [2020-12-23 13:02:57,501 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:57,501 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 516 transitions. [2020-12-23 13:02:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:57,501 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:57,501 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:57,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:57,702 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:57,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:57,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1101808203, now seen corresponding path program 115 times [2020-12-23 13:02:57,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:57,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165391385] [2020-12-23 13:02:57,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:57,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:57,851 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 13:02:57,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165391385] [2020-12-23 13:02:57,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916310989] [2020-12-23 13:02:57,851 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 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 13:02:57,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:57,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:02:57,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:02:58,211 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 13:02:58,212 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:02:58,212 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:02:58,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809056568] [2020-12-23 13:02:58,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:02:58,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:02:58,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:02:58,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:02:58,213 INFO L87 Difference]: Start difference. First operand 190 states and 516 transitions. Second operand 18 states. [2020-12-23 13:02:59,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:02:59,548 INFO L93 Difference]: Finished difference Result 307 states and 753 transitions. [2020-12-23 13:02:59,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:02:59,550 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:02:59,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:02:59,551 INFO L225 Difference]: With dead ends: 307 [2020-12-23 13:02:59,551 INFO L226 Difference]: Without dead ends: 305 [2020-12-23 13:02:59,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=446, Invalid=1114, Unknown=0, NotChecked=0, Total=1560 [2020-12-23 13:02:59,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2020-12-23 13:02:59,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 193. [2020-12-23 13:02:59,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-12-23 13:02:59,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 528 transitions. [2020-12-23 13:02:59,555 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 528 transitions. Word has length 14 [2020-12-23 13:02:59,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:02:59,556 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 528 transitions. [2020-12-23 13:02:59,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:02:59,556 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 528 transitions. [2020-12-23 13:02:59,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:02:59,556 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:02:59,556 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:02:59,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:02:59,757 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:02:59,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:02:59,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1101786813, now seen corresponding path program 116 times [2020-12-23 13:02:59,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:02:59,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218068822] [2020-12-23 13:02:59,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:02:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:02:59,929 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 13:02:59,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218068822] [2020-12-23 13:02:59,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273448126] [2020-12-23 13:02:59,930 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 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 13:02:59,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:02:59,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:02:59,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:02:59,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:00,296 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:03:00,298 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:03:00,300 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:03:00,325 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 13:03:00,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:00,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:03:00,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622752620] [2020-12-23 13:03:00,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:03:00,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:00,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:03:00,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:03:00,327 INFO L87 Difference]: Start difference. First operand 193 states and 528 transitions. Second operand 17 states. [2020-12-23 13:03:02,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:02,092 INFO L93 Difference]: Finished difference Result 326 states and 811 transitions. [2020-12-23 13:03:02,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 13:03:02,094 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:03:02,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:02,096 INFO L225 Difference]: With dead ends: 326 [2020-12-23 13:03:02,096 INFO L226 Difference]: Without dead ends: 318 [2020-12-23 13:03:02,096 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=550, Invalid=1342, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 13:03:02,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-12-23 13:03:02,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 185. [2020-12-23 13:03:02,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 13:03:02,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 500 transitions. [2020-12-23 13:03:02,103 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 500 transitions. Word has length 14 [2020-12-23 13:03:02,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:02,103 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 500 transitions. [2020-12-23 13:03:02,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:03:02,103 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 500 transitions. [2020-12-23 13:03:02,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:03:02,104 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:02,104 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:02,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:02,317 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:02,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:02,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1065830285, now seen corresponding path program 117 times [2020-12-23 13:03:02,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:02,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403230067] [2020-12-23 13:03:02,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:02,491 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:02,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403230067] [2020-12-23 13:03:02,492 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711412896] [2020-12-23 13:03:02,492 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 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 13:03:02,560 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:03:02,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:02,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:03:02,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:02,869 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 13:03:02,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:02,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:03:02,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195518261] [2020-12-23 13:03:02,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:03:02,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:02,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:03:02,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:03:02,871 INFO L87 Difference]: Start difference. First operand 185 states and 500 transitions. Second operand 18 states. [2020-12-23 13:03:03,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:03,878 INFO L93 Difference]: Finished difference Result 302 states and 727 transitions. [2020-12-23 13:03:03,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-23 13:03:03,879 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:03:03,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:03,881 INFO L225 Difference]: With dead ends: 302 [2020-12-23 13:03:03,881 INFO L226 Difference]: Without dead ends: 300 [2020-12-23 13:03:03,881 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=301, Invalid=755, Unknown=0, NotChecked=0, Total=1056 [2020-12-23 13:03:03,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-12-23 13:03:03,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 185. [2020-12-23 13:03:03,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 13:03:03,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 500 transitions. [2020-12-23 13:03:03,885 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 500 transitions. Word has length 14 [2020-12-23 13:03:03,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:03,885 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 500 transitions. [2020-12-23 13:03:03,885 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:03:03,885 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 500 transitions. [2020-12-23 13:03:03,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:03:03,885 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:03,886 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:04,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable143 [2020-12-23 13:03:04,086 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:04,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:04,087 INFO L82 PathProgramCache]: Analyzing trace with hash -1065828363, now seen corresponding path program 118 times [2020-12-23 13:03:04,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:04,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243742325] [2020-12-23 13:03:04,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:04,240 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 13:03:04,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243742325] [2020-12-23 13:03:04,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515681198] [2020-12-23 13:03:04,240 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 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 13:03:04,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:03:04,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:04,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:03:04,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:04,590 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 13:03:04,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:04,591 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:03:04,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490182695] [2020-12-23 13:03:04,591 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:03:04,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:04,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:03:04,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:03:04,592 INFO L87 Difference]: Start difference. First operand 185 states and 500 transitions. Second operand 18 states. [2020-12-23 13:03:05,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:05,456 INFO L93 Difference]: Finished difference Result 295 states and 715 transitions. [2020-12-23 13:03:05,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-23 13:03:05,457 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:03:05,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:05,459 INFO L225 Difference]: With dead ends: 295 [2020-12-23 13:03:05,459 INFO L226 Difference]: Without dead ends: 293 [2020-12-23 13:03:05,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=264, Invalid=666, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:03:05,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-12-23 13:03:05,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 182. [2020-12-23 13:03:05,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-12-23 13:03:05,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 492 transitions. [2020-12-23 13:03:05,463 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 492 transitions. Word has length 14 [2020-12-23 13:03:05,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:05,463 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 492 transitions. [2020-12-23 13:03:05,463 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:03:05,463 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 492 transitions. [2020-12-23 13:03:05,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:03:05,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:05,464 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:05,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-12-23 13:03:05,665 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:05,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:05,666 INFO L82 PathProgramCache]: Analyzing trace with hash -1047061955, now seen corresponding path program 119 times [2020-12-23 13:03:05,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:05,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553406375] [2020-12-23 13:03:05,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:05,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:05,830 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 13:03:05,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553406375] [2020-12-23 13:03:05,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052064220] [2020-12-23 13:03:05,831 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 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 13:03:05,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:03:05,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:05,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:03:05,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:06,209 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 13:03:06,209 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:06,209 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:03:06,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779959818] [2020-12-23 13:03:06,210 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:03:06,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:06,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:03:06,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:03:06,211 INFO L87 Difference]: Start difference. First operand 182 states and 492 transitions. Second operand 18 states. [2020-12-23 13:03:07,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:07,500 INFO L93 Difference]: Finished difference Result 308 states and 744 transitions. [2020-12-23 13:03:07,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-23 13:03:07,502 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:03:07,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:07,503 INFO L225 Difference]: With dead ends: 308 [2020-12-23 13:03:07,503 INFO L226 Difference]: Without dead ends: 306 [2020-12-23 13:03:07,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=408, Invalid=998, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:03:07,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-12-23 13:03:07,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 184. [2020-12-23 13:03:07,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-12-23 13:03:07,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 502 transitions. [2020-12-23 13:03:07,508 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 502 transitions. Word has length 14 [2020-12-23 13:03:07,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:07,508 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 502 transitions. [2020-12-23 13:03:07,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:03:07,509 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 502 transitions. [2020-12-23 13:03:07,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:03:07,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:07,509 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:07,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-12-23 13:03:07,710 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:07,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:07,711 INFO L82 PathProgramCache]: Analyzing trace with hash -1047060033, now seen corresponding path program 120 times [2020-12-23 13:03:07,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:07,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687540024] [2020-12-23 13:03:07,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:07,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:07,879 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 13:03:07,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687540024] [2020-12-23 13:03:07,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887741549] [2020-12-23 13:03:07,880 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:03:07,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:03:07,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:07,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:03:07,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:08,260 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 13:03:08,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:08,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:03:08,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144117624] [2020-12-23 13:03:08,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:03:08,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:08,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:03:08,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:03:08,262 INFO L87 Difference]: Start difference. First operand 184 states and 502 transitions. Second operand 18 states. [2020-12-23 13:03:09,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:09,333 INFO L93 Difference]: Finished difference Result 287 states and 709 transitions. [2020-12-23 13:03:09,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:03:09,335 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:03:09,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:09,336 INFO L225 Difference]: With dead ends: 287 [2020-12-23 13:03:09,336 INFO L226 Difference]: Without dead ends: 285 [2020-12-23 13:03:09,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=317, Invalid=805, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:03:09,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-12-23 13:03:09,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 185. [2020-12-23 13:03:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-12-23 13:03:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 504 transitions. [2020-12-23 13:03:09,341 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 504 transitions. Word has length 14 [2020-12-23 13:03:09,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:09,341 INFO L481 AbstractCegarLoop]: Abstraction has 185 states and 504 transitions. [2020-12-23 13:03:09,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:03:09,341 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 504 transitions. [2020-12-23 13:03:09,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:03:09,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:09,341 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:09,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-12-23 13:03:09,542 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:09,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:09,543 INFO L82 PathProgramCache]: Analyzing trace with hash -1046456525, now seen corresponding path program 121 times [2020-12-23 13:03:09,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:09,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964017424] [2020-12-23 13:03:09,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:09,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:09,713 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 13:03:09,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964017424] [2020-12-23 13:03:09,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733186812] [2020-12-23 13:03:09,714 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 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 13:03:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:09,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:03:09,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:10,073 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 13:03:10,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:10,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:03:10,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555785942] [2020-12-23 13:03:10,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:03:10,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:10,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:03:10,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:03:10,075 INFO L87 Difference]: Start difference. First operand 185 states and 504 transitions. Second operand 18 states. [2020-12-23 13:03:11,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:11,490 INFO L93 Difference]: Finished difference Result 295 states and 729 transitions. [2020-12-23 13:03:11,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:03:11,492 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:03:11,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:11,493 INFO L225 Difference]: With dead ends: 295 [2020-12-23 13:03:11,493 INFO L226 Difference]: Without dead ends: 293 [2020-12-23 13:03:11,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=405, Invalid=1001, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:03:11,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2020-12-23 13:03:11,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 187. [2020-12-23 13:03:11,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-12-23 13:03:11,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 511 transitions. [2020-12-23 13:03:11,497 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 511 transitions. Word has length 14 [2020-12-23 13:03:11,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:11,498 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 511 transitions. [2020-12-23 13:03:11,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:03:11,498 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 511 transitions. [2020-12-23 13:03:11,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:03:11,498 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:11,498 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:11,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-12-23 13:03:11,699 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:11,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:11,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1046437057, now seen corresponding path program 122 times [2020-12-23 13:03:11,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:11,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681297113] [2020-12-23 13:03:11,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:11,933 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 13:03:11,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681297113] [2020-12-23 13:03:11,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377241064] [2020-12-23 13:03:11,934 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 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 13:03:12,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:03:12,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:12,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:03:12,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:12,255 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:03:12,298 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 13:03:12,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:12,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:03:12,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462336027] [2020-12-23 13:03:12,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:03:12,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:12,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:03:12,300 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:03:12,300 INFO L87 Difference]: Start difference. First operand 187 states and 511 transitions. Second operand 18 states. [2020-12-23 13:03:13,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:13,907 INFO L93 Difference]: Finished difference Result 327 states and 805 transitions. [2020-12-23 13:03:13,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 13:03:13,908 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:03:13,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:13,910 INFO L225 Difference]: With dead ends: 327 [2020-12-23 13:03:13,910 INFO L226 Difference]: Without dead ends: 315 [2020-12-23 13:03:13,910 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=571, Invalid=1499, Unknown=0, NotChecked=0, Total=2070 [2020-12-23 13:03:13,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-12-23 13:03:13,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 188. [2020-12-23 13:03:13,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-23 13:03:13,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 513 transitions. [2020-12-23 13:03:13,915 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 513 transitions. Word has length 14 [2020-12-23 13:03:13,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:13,916 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 513 transitions. [2020-12-23 13:03:13,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:03:13,916 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 513 transitions. [2020-12-23 13:03:13,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:03:13,916 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:13,916 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:14,117 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-12-23 13:03:14,118 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:14,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:14,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1046396943, now seen corresponding path program 123 times [2020-12-23 13:03:14,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:14,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897111033] [2020-12-23 13:03:14,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:14,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:14,291 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 13:03:14,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897111033] [2020-12-23 13:03:14,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979210473] [2020-12-23 13:03:14,292 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 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 13:03:14,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:03:14,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:14,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:03:14,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:14,649 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 13:03:14,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:14,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:03:14,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429947976] [2020-12-23 13:03:14,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:03:14,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:14,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:03:14,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:03:14,652 INFO L87 Difference]: Start difference. First operand 188 states and 513 transitions. Second operand 18 states. [2020-12-23 13:03:15,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:15,849 INFO L93 Difference]: Finished difference Result 302 states and 758 transitions. [2020-12-23 13:03:15,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:03:15,851 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:03:15,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:15,853 INFO L225 Difference]: With dead ends: 302 [2020-12-23 13:03:15,853 INFO L226 Difference]: Without dead ends: 300 [2020-12-23 13:03:15,853 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-12-23 13:03:15,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2020-12-23 13:03:15,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 191. [2020-12-23 13:03:15,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-12-23 13:03:15,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 525 transitions. [2020-12-23 13:03:15,858 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 525 transitions. Word has length 14 [2020-12-23 13:03:15,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:15,858 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 525 transitions. [2020-12-23 13:03:15,858 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:03:15,858 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 525 transitions. [2020-12-23 13:03:15,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:03:15,858 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:15,858 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:16,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:16,059 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:16,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:16,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1046377475, now seen corresponding path program 124 times [2020-12-23 13:03:16,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:16,061 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447289703] [2020-12-23 13:03:16,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:16,235 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 13:03:16,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447289703] [2020-12-23 13:03:16,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706513408] [2020-12-23 13:03:16,236 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 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 13:03:16,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:03:16,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:16,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:03:16,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:16,528 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:03:16,532 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 13:03:16,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:16,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:03:16,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407096669] [2020-12-23 13:03:16,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:03:16,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:16,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:03:16,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:03:16,533 INFO L87 Difference]: Start difference. First operand 191 states and 525 transitions. Second operand 17 states. [2020-12-23 13:03:17,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:17,897 INFO L93 Difference]: Finished difference Result 336 states and 839 transitions. [2020-12-23 13:03:17,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-12-23 13:03:17,899 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:03:17,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:17,902 INFO L225 Difference]: With dead ends: 336 [2020-12-23 13:03:17,902 INFO L226 Difference]: Without dead ends: 328 [2020-12-23 13:03:17,902 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-12-23 13:03:17,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-12-23 13:03:17,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 188. [2020-12-23 13:03:17,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-12-23 13:03:17,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 510 transitions. [2020-12-23 13:03:17,908 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 510 transitions. Word has length 14 [2020-12-23 13:03:17,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:17,909 INFO L481 AbstractCegarLoop]: Abstraction has 188 states and 510 transitions. [2020-12-23 13:03:17,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:03:17,909 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 510 transitions. [2020-12-23 13:03:17,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:03:17,910 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:17,910 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:18,124 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-12-23 13:03:18,125 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:18,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:18,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1046375553, now seen corresponding path program 125 times [2020-12-23 13:03:18,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:18,126 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559674132] [2020-12-23 13:03:18,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:18,303 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 13:03:18,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559674132] [2020-12-23 13:03:18,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293708146] [2020-12-23 13:03:18,304 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 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 13:03:18,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:03:18,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:18,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:03:18,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:18,642 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 13:03:18,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:18,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:03:18,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188462355] [2020-12-23 13:03:18,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:03:18,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:18,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:03:18,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:03:18,644 INFO L87 Difference]: Start difference. First operand 188 states and 510 transitions. Second operand 17 states. [2020-12-23 13:03:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:20,135 INFO L93 Difference]: Finished difference Result 327 states and 818 transitions. [2020-12-23 13:03:20,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-12-23 13:03:20,136 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:03:20,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:20,137 INFO L225 Difference]: With dead ends: 327 [2020-12-23 13:03:20,137 INFO L226 Difference]: Without dead ends: 319 [2020-12-23 13:03:20,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-12-23 13:03:20,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-12-23 13:03:20,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 181. [2020-12-23 13:03:20,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2020-12-23 13:03:20,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 481 transitions. [2020-12-23 13:03:20,141 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 481 transitions. Word has length 14 [2020-12-23 13:03:20,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:20,142 INFO L481 AbstractCegarLoop]: Abstraction has 181 states and 481 transitions. [2020-12-23 13:03:20,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:03:20,142 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 481 transitions. [2020-12-23 13:03:20,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:03:20,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:20,142 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:20,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:20,343 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:20,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:20,344 INFO L82 PathProgramCache]: Analyzing trace with hash 70160127, now seen corresponding path program 126 times [2020-12-23 13:03:20,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:20,344 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113866669] [2020-12-23 13:03:20,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:20,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:20,480 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 13:03:20,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113866669] [2020-12-23 13:03:20,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [144315648] [2020-12-23 13:03:20,481 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 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 13:03:20,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:03:20,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:20,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-23 13:03:20,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:20,937 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 13:03:20,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:20,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:03:20,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144724104] [2020-12-23 13:03:20,938 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:03:20,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:20,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:03:20,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:03:20,939 INFO L87 Difference]: Start difference. First operand 181 states and 481 transitions. Second operand 18 states. [2020-12-23 13:03:21,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:21,706 INFO L93 Difference]: Finished difference Result 268 states and 658 transitions. [2020-12-23 13:03:21,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-23 13:03:21,707 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:03:21,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:21,708 INFO L225 Difference]: With dead ends: 268 [2020-12-23 13:03:21,708 INFO L226 Difference]: Without dead ends: 266 [2020-12-23 13:03:21,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=231, Invalid=525, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:03:21,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-12-23 13:03:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 179. [2020-12-23 13:03:21,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-12-23 13:03:21,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 476 transitions. [2020-12-23 13:03:21,712 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 476 transitions. Word has length 14 [2020-12-23 13:03:21,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:21,712 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 476 transitions. [2020-12-23 13:03:21,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:03:21,712 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 476 transitions. [2020-12-23 13:03:21,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:03:21,713 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:21,713 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:21,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:21,914 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:21,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:21,915 INFO L82 PathProgramCache]: Analyzing trace with hash 651978357, now seen corresponding path program 127 times [2020-12-23 13:03:21,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:21,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625856833] [2020-12-23 13:03:21,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:21,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:22,084 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 13:03:22,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625856833] [2020-12-23 13:03:22,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723598789] [2020-12-23 13:03:22,084 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 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 13:03:22,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:22,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:03:22,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:22,567 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 13:03:22,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:22,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:03:22,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647036370] [2020-12-23 13:03:22,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:03:22,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:22,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:03:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:03:22,569 INFO L87 Difference]: Start difference. First operand 179 states and 476 transitions. Second operand 18 states. [2020-12-23 13:03:23,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:23,489 INFO L93 Difference]: Finished difference Result 271 states and 658 transitions. [2020-12-23 13:03:23,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:03:23,491 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:03:23,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:23,492 INFO L225 Difference]: With dead ends: 271 [2020-12-23 13:03:23,492 INFO L226 Difference]: Without dead ends: 269 [2020-12-23 13:03:23,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=211, Invalid=545, Unknown=0, NotChecked=0, Total=756 [2020-12-23 13:03:23,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-12-23 13:03:23,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 177. [2020-12-23 13:03:23,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:03:23,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 471 transitions. [2020-12-23 13:03:23,508 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 471 transitions. Word has length 14 [2020-12-23 13:03:23,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:23,509 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 471 transitions. [2020-12-23 13:03:23,509 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:03:23,509 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 471 transitions. [2020-12-23 13:03:23,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:03:23,509 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:23,509 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:23,723 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:23,724 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:23,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:23,725 INFO L82 PathProgramCache]: Analyzing trace with hash 672534147, now seen corresponding path program 128 times [2020-12-23 13:03:23,725 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:23,725 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762336650] [2020-12-23 13:03:23,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:23,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:23,898 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 13:03:23,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762336650] [2020-12-23 13:03:23,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211014450] [2020-12-23 13:03:23,899 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 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 13:03:23,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:03:23,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:23,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:03:23,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:24,400 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 13:03:24,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:24,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:03:24,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201694159] [2020-12-23 13:03:24,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:03:24,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:24,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:03:24,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:03:24,402 INFO L87 Difference]: Start difference. First operand 177 states and 471 transitions. Second operand 18 states. [2020-12-23 13:03:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:25,456 INFO L93 Difference]: Finished difference Result 288 states and 695 transitions. [2020-12-23 13:03:25,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-23 13:03:25,458 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:03:25,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:25,459 INFO L225 Difference]: With dead ends: 288 [2020-12-23 13:03:25,459 INFO L226 Difference]: Without dead ends: 286 [2020-12-23 13:03:25,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:03:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-12-23 13:03:25,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 175. [2020-12-23 13:03:25,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 13:03:25,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 466 transitions. [2020-12-23 13:03:25,464 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 466 transitions. Word has length 14 [2020-12-23 13:03:25,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:25,464 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 466 transitions. [2020-12-23 13:03:25,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:03:25,464 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 466 transitions. [2020-12-23 13:03:25,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:03:25,464 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:25,465 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:25,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:25,666 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:25,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:25,666 INFO L82 PathProgramCache]: Analyzing trace with hash 673139577, now seen corresponding path program 129 times [2020-12-23 13:03:25,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:25,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191210231] [2020-12-23 13:03:25,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:25,839 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 13:03:25,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191210231] [2020-12-23 13:03:25,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779331893] [2020-12-23 13:03:25,840 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 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 13:03:25,909 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:03:25,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:25,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:03:25,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:26,341 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 13:03:26,342 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:26,342 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-12-23 13:03:26,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223289908] [2020-12-23 13:03:26,343 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-23 13:03:26,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:26,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-23 13:03:26,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2020-12-23 13:03:26,343 INFO L87 Difference]: Start difference. First operand 175 states and 466 transitions. Second operand 18 states. [2020-12-23 13:03:27,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:27,693 INFO L93 Difference]: Finished difference Result 285 states and 703 transitions. [2020-12-23 13:03:27,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:03:27,695 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-12-23 13:03:27,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:27,696 INFO L225 Difference]: With dead ends: 285 [2020-12-23 13:03:27,696 INFO L226 Difference]: Without dead ends: 283 [2020-12-23 13:03:27,696 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=335, Invalid=787, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:03:27,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-12-23 13:03:27,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 177. [2020-12-23 13:03:27,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-12-23 13:03:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 473 transitions. [2020-12-23 13:03:27,701 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 473 transitions. Word has length 14 [2020-12-23 13:03:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:27,701 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 473 transitions. [2020-12-23 13:03:27,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-23 13:03:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 473 transitions. [2020-12-23 13:03:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:03:27,702 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:27,702 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:27,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-12-23 13:03:27,902 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:27,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:27,903 INFO L82 PathProgramCache]: Analyzing trace with hash 673160967, now seen corresponding path program 130 times [2020-12-23 13:03:27,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:27,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484162044] [2020-12-23 13:03:27,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:27,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:28,085 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 13:03:28,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484162044] [2020-12-23 13:03:28,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52155662] [2020-12-23 13:03:28,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-bitabs/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 13:03:28,153 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:03:28,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:28,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-23 13:03:28,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:28,547 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:03:28,548 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:03:28,550 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:03:28,584 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 13:03:28,585 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:28,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-12-23 13:03:28,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859864737] [2020-12-23 13:03:28,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-23 13:03:28,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:28,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-23 13:03:28,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-12-23 13:03:28,586 INFO L87 Difference]: Start difference. First operand 177 states and 473 transitions. Second operand 17 states. [2020-12-23 13:03:30,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:30,149 INFO L93 Difference]: Finished difference Result 320 states and 801 transitions. [2020-12-23 13:03:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-12-23 13:03:30,151 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-12-23 13:03:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:30,152 INFO L225 Difference]: With dead ends: 320 [2020-12-23 13:03:30,152 INFO L226 Difference]: Without dead ends: 312 [2020-12-23 13:03:30,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=436, Invalid=970, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:03:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2020-12-23 13:03:30,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 175. [2020-12-23 13:03:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-12-23 13:03:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 466 transitions. [2020-12-23 13:03:30,156 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 466 transitions. Word has length 14 [2020-12-23 13:03:30,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:30,156 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 466 transitions. [2020-12-23 13:03:30,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-23 13:03:30,157 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 466 transitions. [2020-12-23 13:03:30,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-23 13:03:30,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:30,157 INFO L422 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:30,357 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-12-23 13:03:30,358 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:30,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:30,359 INFO L82 PathProgramCache]: Analyzing trace with hash -375220650, now seen corresponding path program 23 times [2020-12-23 13:03:30,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:30,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91253243] [2020-12-23 13:03:30,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:30,485 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:30,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91253243] [2020-12-23 13:03:30,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181084492] [2020-12-23 13:03:30,486 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 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 13:03:30,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 13:03:30,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:30,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 13:03:30,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:30,597 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 21 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:30,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 13:03:30,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [9] total 10 [2020-12-23 13:03:30,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103086572] [2020-12-23 13:03:30,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:03:30,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:30,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:03:30,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:03:30,599 INFO L87 Difference]: Start difference. First operand 175 states and 466 transitions. Second operand 9 states. [2020-12-23 13:03:30,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:30,660 INFO L93 Difference]: Finished difference Result 299 states and 849 transitions. [2020-12-23 13:03:30,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:03:30,662 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 14 [2020-12-23 13:03:30,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:30,662 INFO L225 Difference]: With dead ends: 299 [2020-12-23 13:03:30,662 INFO L226 Difference]: Without dead ends: 279 [2020-12-23 13:03:30,663 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2020-12-23 13:03:30,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-12-23 13:03:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 279. [2020-12-23 13:03:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 279 states. [2020-12-23 13:03:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 801 transitions. [2020-12-23 13:03:30,669 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 801 transitions. Word has length 14 [2020-12-23 13:03:30,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:30,669 INFO L481 AbstractCegarLoop]: Abstraction has 279 states and 801 transitions. [2020-12-23 13:03:30,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:03:30,670 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 801 transitions. [2020-12-23 13:03:30,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:30,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:30,670 INFO L422 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:30,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-12-23 13:03:30,875 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:30,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:30,875 INFO L82 PathProgramCache]: Analyzing trace with hash -906973985, now seen corresponding path program 5 times [2020-12-23 13:03:30,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:30,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492570690] [2020-12-23 13:03:30,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:31,009 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 21 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:31,009 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492570690] [2020-12-23 13:03:31,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453184272] [2020-12-23 13:03:31,010 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 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 13:03:31,080 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-23 13:03:31,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:31,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 8 conjunts are in the unsatisfiable core [2020-12-23 13:03:31,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:31,125 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 28 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-23 13:03:31,126 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-23 13:03:31,126 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [10] total 11 [2020-12-23 13:03:31,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252935080] [2020-12-23 13:03:31,126 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-23 13:03:31,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:31,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-23 13:03:31,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:03:31,127 INFO L87 Difference]: Start difference. First operand 279 states and 801 transitions. Second operand 9 states. [2020-12-23 13:03:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:31,186 INFO L93 Difference]: Finished difference Result 369 states and 1052 transitions. [2020-12-23 13:03:31,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-23 13:03:31,189 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 15 [2020-12-23 13:03:31,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:31,190 INFO L225 Difference]: With dead ends: 369 [2020-12-23 13:03:31,190 INFO L226 Difference]: Without dead ends: 355 [2020-12-23 13:03:31,191 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2020-12-23 13:03:31,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-12-23 13:03:31,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 355. [2020-12-23 13:03:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-12-23 13:03:31,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1023 transitions. [2020-12-23 13:03:31,200 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1023 transitions. Word has length 15 [2020-12-23 13:03:31,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:31,201 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 1023 transitions. [2020-12-23 13:03:31,201 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-23 13:03:31,201 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1023 transitions. [2020-12-23 13:03:31,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:31,202 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:31,202 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:31,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-12-23 13:03:31,415 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:31,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:31,416 INFO L82 PathProgramCache]: Analyzing trace with hash -1777584495, now seen corresponding path program 131 times [2020-12-23 13:03:31,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:31,417 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974912990] [2020-12-23 13:03:31,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:31,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:31,595 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 13:03:31,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974912990] [2020-12-23 13:03:31,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302032341] [2020-12-23 13:03:31,596 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 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 13:03:31,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-23 13:03:31,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:31,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:31,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:32,121 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 13:03:32,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:32,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:32,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685297751] [2020-12-23 13:03:32,122 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:32,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:32,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:32,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:32,123 INFO L87 Difference]: Start difference. First operand 355 states and 1023 transitions. Second operand 20 states. [2020-12-23 13:03:32,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:32,581 INFO L93 Difference]: Finished difference Result 377 states and 1070 transitions. [2020-12-23 13:03:32,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-23 13:03:32,583 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:32,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:32,584 INFO L225 Difference]: With dead ends: 377 [2020-12-23 13:03:32,585 INFO L226 Difference]: Without dead ends: 375 [2020-12-23 13:03:32,585 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-12-23 13:03:32,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-12-23 13:03:32,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 353. [2020-12-23 13:03:32,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-12-23 13:03:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1021 transitions. [2020-12-23 13:03:32,593 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1021 transitions. Word has length 15 [2020-12-23 13:03:32,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:32,593 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 1021 transitions. [2020-12-23 13:03:32,593 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:32,593 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1021 transitions. [2020-12-23 13:03:32,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:32,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:32,594 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:32,794 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:32,795 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:32,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:32,796 INFO L82 PathProgramCache]: Analyzing trace with hash -1777303635, now seen corresponding path program 132 times [2020-12-23 13:03:32,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:32,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [885298192] [2020-12-23 13:03:32,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:32,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:33,038 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 13:03:33,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [885298192] [2020-12-23 13:03:33,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211948746] [2020-12-23 13:03:33,039 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 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 13:03:33,105 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-23 13:03:33,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:33,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:33,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:33,487 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:03:33,489 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:03:33,491 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:03:33,537 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 13:03:33,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:33,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:33,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279980937] [2020-12-23 13:03:33,538 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:33,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:33,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:33,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=277, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:33,538 INFO L87 Difference]: Start difference. First operand 353 states and 1021 transitions. Second operand 20 states. [2020-12-23 13:03:34,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:34,678 INFO L93 Difference]: Finished difference Result 478 states and 1284 transitions. [2020-12-23 13:03:34,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:03:34,680 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:34,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:34,682 INFO L225 Difference]: With dead ends: 478 [2020-12-23 13:03:34,682 INFO L226 Difference]: Without dead ends: 467 [2020-12-23 13:03:34,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=375, Invalid=885, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:03:34,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2020-12-23 13:03:34,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 346. [2020-12-23 13:03:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 346 states. [2020-12-23 13:03:34,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 1015 transitions. [2020-12-23 13:03:34,692 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 1015 transitions. Word has length 15 [2020-12-23 13:03:34,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:34,693 INFO L481 AbstractCegarLoop]: Abstraction has 346 states and 1015 transitions. [2020-12-23 13:03:34,693 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:34,693 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 1015 transitions. [2020-12-23 13:03:34,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:34,694 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:34,694 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:34,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2020-12-23 13:03:34,909 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:34,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:34,909 INFO L82 PathProgramCache]: Analyzing trace with hash -915650353, now seen corresponding path program 133 times [2020-12-23 13:03:34,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:34,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313747112] [2020-12-23 13:03:34,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:34,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:35,136 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 13:03:35,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313747112] [2020-12-23 13:03:35,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357347751] [2020-12-23 13:03:35,137 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 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 13:03:35,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:35,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:35,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:35,688 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 13:03:35,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:35,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:35,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917891200] [2020-12-23 13:03:35,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:35,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:35,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:35,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:35,690 INFO L87 Difference]: Start difference. First operand 346 states and 1015 transitions. Second operand 20 states. [2020-12-23 13:03:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:36,596 INFO L93 Difference]: Finished difference Result 455 states and 1242 transitions. [2020-12-23 13:03:36,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-23 13:03:36,599 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:36,599 INFO L225 Difference]: With dead ends: 455 [2020-12-23 13:03:36,599 INFO L226 Difference]: Without dead ends: 451 [2020-12-23 13:03:36,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=281, Invalid=649, Unknown=0, NotChecked=0, Total=930 [2020-12-23 13:03:36,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2020-12-23 13:03:36,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 351. [2020-12-23 13:03:36,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2020-12-23 13:03:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 1024 transitions. [2020-12-23 13:03:36,610 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 1024 transitions. Word has length 15 [2020-12-23 13:03:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:36,610 INFO L481 AbstractCegarLoop]: Abstraction has 351 states and 1024 transitions. [2020-12-23 13:03:36,611 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:36,611 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 1024 transitions. [2020-12-23 13:03:36,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:36,612 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:36,612 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:36,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:36,827 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:36,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:36,827 INFO L82 PathProgramCache]: Analyzing trace with hash -645743893, now seen corresponding path program 134 times [2020-12-23 13:03:36,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:36,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375347454] [2020-12-23 13:03:36,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:37,054 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 13:03:37,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375347454] [2020-12-23 13:03:37,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849387584] [2020-12-23 13:03:37,055 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 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 13:03:37,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:03:37,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:37,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:37,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:37,655 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 13:03:37,656 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:37,656 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:37,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431901490] [2020-12-23 13:03:37,656 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:37,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:37,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:37,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=295, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:37,657 INFO L87 Difference]: Start difference. First operand 351 states and 1024 transitions. Second operand 20 states. [2020-12-23 13:03:38,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:38,725 INFO L93 Difference]: Finished difference Result 468 states and 1264 transitions. [2020-12-23 13:03:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:03:38,727 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:38,729 INFO L225 Difference]: With dead ends: 468 [2020-12-23 13:03:38,729 INFO L226 Difference]: Without dead ends: 464 [2020-12-23 13:03:38,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:03:38,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2020-12-23 13:03:38,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 353. [2020-12-23 13:03:38,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 353 states. [2020-12-23 13:03:38,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 1031 transitions. [2020-12-23 13:03:38,739 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 1031 transitions. Word has length 15 [2020-12-23 13:03:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:38,740 INFO L481 AbstractCegarLoop]: Abstraction has 353 states and 1031 transitions. [2020-12-23 13:03:38,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:38,740 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 1031 transitions. [2020-12-23 13:03:38,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:38,741 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:38,741 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:38,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:38,952 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:38,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:38,952 INFO L82 PathProgramCache]: Analyzing trace with hash -645138463, now seen corresponding path program 135 times [2020-12-23 13:03:38,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:38,953 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154206743] [2020-12-23 13:03:38,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:38,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:39,182 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 13:03:39,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154206743] [2020-12-23 13:03:39,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949761223] [2020-12-23 13:03:39,183 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 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 13:03:39,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:03:39,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:39,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:39,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:39,778 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 13:03:39,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:39,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:39,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039878576] [2020-12-23 13:03:39,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:39,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:39,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:39,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:39,780 INFO L87 Difference]: Start difference. First operand 353 states and 1031 transitions. Second operand 20 states. [2020-12-23 13:03:40,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:40,987 INFO L93 Difference]: Finished difference Result 467 states and 1266 transitions. [2020-12-23 13:03:40,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:03:40,988 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:40,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:40,990 INFO L225 Difference]: With dead ends: 467 [2020-12-23 13:03:40,990 INFO L226 Difference]: Without dead ends: 463 [2020-12-23 13:03:40,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=347, Invalid=775, Unknown=0, NotChecked=0, Total=1122 [2020-12-23 13:03:40,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2020-12-23 13:03:40,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 357. [2020-12-23 13:03:40,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-12-23 13:03:40,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1045 transitions. [2020-12-23 13:03:40,999 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1045 transitions. Word has length 15 [2020-12-23 13:03:40,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:40,999 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 1045 transitions. [2020-12-23 13:03:40,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:40,999 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1045 transitions. [2020-12-23 13:03:41,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:41,000 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:41,000 INFO L422 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:41,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:41,201 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:41,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:41,202 INFO L82 PathProgramCache]: Analyzing trace with hash -645118995, now seen corresponding path program 136 times [2020-12-23 13:03:41,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:41,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311593826] [2020-12-23 13:03:41,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:41,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:41,421 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 13:03:41,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311593826] [2020-12-23 13:03:41,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611512010] [2020-12-23 13:03:41,422 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 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 13:03:41,484 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:03:41,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:41,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:41,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:41,881 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:03:41,886 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-12-23 13:03:41,887 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:03:41,924 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 13:03:41,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:41,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2020-12-23 13:03:41,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006376833] [2020-12-23 13:03:41,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-23 13:03:41,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:41,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-23 13:03:41,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=228, Unknown=0, NotChecked=0, Total=342 [2020-12-23 13:03:41,926 INFO L87 Difference]: Start difference. First operand 357 states and 1045 transitions. Second operand 19 states. [2020-12-23 13:03:43,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:43,560 INFO L93 Difference]: Finished difference Result 423 states and 1167 transitions. [2020-12-23 13:03:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:03:43,562 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 15 [2020-12-23 13:03:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:43,563 INFO L225 Difference]: With dead ends: 423 [2020-12-23 13:03:43,563 INFO L226 Difference]: Without dead ends: 417 [2020-12-23 13:03:43,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=462, Invalid=944, Unknown=0, NotChecked=0, Total=1406 [2020-12-23 13:03:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2020-12-23 13:03:43,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 357. [2020-12-23 13:03:43,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-12-23 13:03:43,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1043 transitions. [2020-12-23 13:03:43,569 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1043 transitions. Word has length 15 [2020-12-23 13:03:43,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:43,570 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 1043 transitions. [2020-12-23 13:03:43,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-23 13:03:43,570 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1043 transitions. [2020-12-23 13:03:43,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:43,570 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:43,570 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:43,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2020-12-23 13:03:43,772 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:43,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:43,772 INFO L82 PathProgramCache]: Analyzing trace with hash -645117073, now seen corresponding path program 137 times [2020-12-23 13:03:43,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:43,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870789881] [2020-12-23 13:03:43,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:44,023 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 13:03:44,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870789881] [2020-12-23 13:03:44,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856698471] [2020-12-23 13:03:44,024 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 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 13:03:44,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:03:44,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:44,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:44,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:44,527 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:03:44,529 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 5 disjuncts [2020-12-23 13:03:44,532 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:03:44,534 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-23 13:03:44,592 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 13:03:44,592 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:44,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:44,593 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24754493] [2020-12-23 13:03:44,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:44,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:44,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:44,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=269, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:44,594 INFO L87 Difference]: Start difference. First operand 357 states and 1043 transitions. Second operand 20 states. [2020-12-23 13:03:46,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:46,331 INFO L93 Difference]: Finished difference Result 599 states and 1580 transitions. [2020-12-23 13:03:46,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-23 13:03:46,334 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:46,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:46,335 INFO L225 Difference]: With dead ends: 599 [2020-12-23 13:03:46,335 INFO L226 Difference]: Without dead ends: 584 [2020-12-23 13:03:46,335 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=506, Invalid=1216, Unknown=0, NotChecked=0, Total=1722 [2020-12-23 13:03:46,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-12-23 13:03:46,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 355. [2020-12-23 13:03:46,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-12-23 13:03:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 1047 transitions. [2020-12-23 13:03:46,342 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 1047 transitions. Word has length 15 [2020-12-23 13:03:46,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:46,342 INFO L481 AbstractCegarLoop]: Abstraction has 355 states and 1047 transitions. [2020-12-23 13:03:46,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:46,342 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 1047 transitions. [2020-12-23 13:03:46,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:46,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:46,342 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:46,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:03:46,543 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:46,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:46,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1203149473, now seen corresponding path program 138 times [2020-12-23 13:03:46,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:46,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215042843] [2020-12-23 13:03:46,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:46,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:46,794 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 13:03:46,794 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215042843] [2020-12-23 13:03:46,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853957246] [2020-12-23 13:03:46,795 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 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 13:03:46,861 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:03:46,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:03:46,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-23 13:03:46,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:48,798 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 13:03:48,798 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:48,798 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:48,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500944024] [2020-12-23 13:03:48,799 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:48,799 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:48,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:48,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=295, Unknown=1, NotChecked=0, Total=380 [2020-12-23 13:03:48,800 INFO L87 Difference]: Start difference. First operand 355 states and 1047 transitions. Second operand 20 states. [2020-12-23 13:03:53,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:03:53,463 INFO L93 Difference]: Finished difference Result 472 states and 1285 transitions. [2020-12-23 13:03:53,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-23 13:03:53,466 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:03:53,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:03:53,468 INFO L225 Difference]: With dead ends: 472 [2020-12-23 13:03:53,468 INFO L226 Difference]: Without dead ends: 469 [2020-12-23 13:03:53,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=299, Invalid=692, Unknown=1, NotChecked=0, Total=992 [2020-12-23 13:03:53,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2020-12-23 13:03:53,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 357. [2020-12-23 13:03:53,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 357 states. [2020-12-23 13:03:53,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 357 states to 357 states and 1053 transitions. [2020-12-23 13:03:53,476 INFO L78 Accepts]: Start accepts. Automaton has 357 states and 1053 transitions. Word has length 15 [2020-12-23 13:03:53,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:03:53,476 INFO L481 AbstractCegarLoop]: Abstraction has 357 states and 1053 transitions. [2020-12-23 13:03:53,476 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:03:53,477 INFO L276 IsEmpty]: Start isEmpty. Operand 357 states and 1053 transitions. [2020-12-23 13:03:53,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:03:53,477 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:03:53,477 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:03:53,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-12-23 13:03:53,678 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:03:53,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:03:53,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1203089891, now seen corresponding path program 139 times [2020-12-23 13:03:53,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:03:53,679 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073358481] [2020-12-23 13:03:53,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:03:53,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:53,999 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 13:03:53,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073358481] [2020-12-23 13:03:54,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338573467] [2020-12-23 13:03:54,000 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 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 13:03:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:03:54,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:03:54,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:03:55,260 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 13:03:55,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:03:55,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:03:55,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011005950] [2020-12-23 13:03:55,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:03:55,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:03:55,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:03:55,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:03:55,262 INFO L87 Difference]: Start difference. First operand 357 states and 1053 transitions. Second operand 20 states. [2020-12-23 13:04:00,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:00,760 INFO L93 Difference]: Finished difference Result 513 states and 1379 transitions. [2020-12-23 13:04:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-23 13:04:00,762 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:00,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:00,764 INFO L225 Difference]: With dead ends: 513 [2020-12-23 13:04:00,764 INFO L226 Difference]: Without dead ends: 504 [2020-12-23 13:04:00,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:04:00,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2020-12-23 13:04:00,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 363. [2020-12-23 13:04:00,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-12-23 13:04:00,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1065 transitions. [2020-12-23 13:04:00,774 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1065 transitions. Word has length 15 [2020-12-23 13:04:00,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:00,775 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 1065 transitions. [2020-12-23 13:04:00,775 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:00,775 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1065 transitions. [2020-12-23 13:04:00,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:00,776 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:00,776 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:00,989 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:00,990 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:00,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:00,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1425983805, now seen corresponding path program 140 times [2020-12-23 13:04:00,991 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:00,991 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14495303] [2020-12-23 13:04:00,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:00,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:01,241 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 13:04:01,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14495303] [2020-12-23 13:04:01,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968091658] [2020-12-23 13:04:01,242 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 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 13:04:01,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-23 13:04:01,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:01,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:01,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:01,961 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 13:04:01,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:01,962 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:01,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646729603] [2020-12-23 13:04:01,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:01,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:01,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:01,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:01,963 INFO L87 Difference]: Start difference. First operand 363 states and 1065 transitions. Second operand 20 states. [2020-12-23 13:04:09,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:09,236 INFO L93 Difference]: Finished difference Result 478 states and 1298 transitions. [2020-12-23 13:04:09,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:04:09,238 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:09,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:09,240 INFO L225 Difference]: With dead ends: 478 [2020-12-23 13:04:09,240 INFO L226 Difference]: Without dead ends: 475 [2020-12-23 13:04:09,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=267, Invalid=725, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:04:09,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2020-12-23 13:04:09,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 363. [2020-12-23 13:04:09,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-12-23 13:04:09,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1065 transitions. [2020-12-23 13:04:09,247 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1065 transitions. Word has length 15 [2020-12-23 13:04:09,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:09,247 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 1065 transitions. [2020-12-23 13:04:09,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:09,247 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1065 transitions. [2020-12-23 13:04:09,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:09,248 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:09,248 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:09,448 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-12-23 13:04:09,448 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:09,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:09,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1425924223, now seen corresponding path program 141 times [2020-12-23 13:04:09,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:09,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438095799] [2020-12-23 13:04:09,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:09,737 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 13:04:09,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438095799] [2020-12-23 13:04:09,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480059320] [2020-12-23 13:04:09,738 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 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 13:04:09,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-23 13:04:09,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:09,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:09,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:10,536 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 13:04:10,537 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:10,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:10,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409780344] [2020-12-23 13:04:10,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:10,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:10,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:10,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:10,538 INFO L87 Difference]: Start difference. First operand 363 states and 1065 transitions. Second operand 20 states. [2020-12-23 13:04:18,415 WARN L197 SmtUtils]: Spent 1.52 s on a formula simplification that was a NOOP. DAG size: 43 [2020-12-23 13:04:18,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:18,805 INFO L93 Difference]: Finished difference Result 510 states and 1375 transitions. [2020-12-23 13:04:18,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:04:18,808 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:18,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:18,809 INFO L225 Difference]: With dead ends: 510 [2020-12-23 13:04:18,809 INFO L226 Difference]: Without dead ends: 501 [2020-12-23 13:04:18,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=266, Invalid=726, Unknown=0, NotChecked=0, Total=992 [2020-12-23 13:04:18,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2020-12-23 13:04:18,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 363. [2020-12-23 13:04:18,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-12-23 13:04:18,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1064 transitions. [2020-12-23 13:04:18,816 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1064 transitions. Word has length 15 [2020-12-23 13:04:18,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:18,817 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 1064 transitions. [2020-12-23 13:04:18,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:18,817 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1064 transitions. [2020-12-23 13:04:18,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:18,817 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:18,818 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:19,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-12-23 13:04:19,018 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:19,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:19,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1407215475, now seen corresponding path program 142 times [2020-12-23 13:04:19,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:19,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357119964] [2020-12-23 13:04:19,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:19,322 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 13:04:19,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357119964] [2020-12-23 13:04:19,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716970086] [2020-12-23 13:04:19,323 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 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 13:04:19,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-23 13:04:19,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:19,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:19,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:20,052 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 13:04:20,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:20,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:20,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667241750] [2020-12-23 13:04:20,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:20,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:20,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:20,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:20,055 INFO L87 Difference]: Start difference. First operand 363 states and 1064 transitions. Second operand 20 states. [2020-12-23 13:04:23,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:23,800 INFO L93 Difference]: Finished difference Result 482 states and 1298 transitions. [2020-12-23 13:04:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-23 13:04:23,803 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:23,804 INFO L225 Difference]: With dead ends: 482 [2020-12-23 13:04:23,805 INFO L226 Difference]: Without dead ends: 479 [2020-12-23 13:04:23,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=363, Invalid=897, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:04:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-12-23 13:04:23,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 362. [2020-12-23 13:04:23,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 362 states. [2020-12-23 13:04:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 1061 transitions. [2020-12-23 13:04:23,812 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 1061 transitions. Word has length 15 [2020-12-23 13:04:23,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:23,813 INFO L481 AbstractCegarLoop]: Abstraction has 362 states and 1061 transitions. [2020-12-23 13:04:23,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:23,813 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 1061 transitions. [2020-12-23 13:04:23,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:23,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:23,813 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:24,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:24,014 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:24,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:24,015 INFO L82 PathProgramCache]: Analyzing trace with hash -1406610045, now seen corresponding path program 143 times [2020-12-23 13:04:24,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:24,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902296880] [2020-12-23 13:04:24,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:24,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:24,329 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 13:04:24,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902296880] [2020-12-23 13:04:24,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184062249] [2020-12-23 13:04:24,330 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 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 13:04:24,394 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-23 13:04:24,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:24,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:24,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:25,151 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 13:04:25,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:25,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:25,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175883215] [2020-12-23 13:04:25,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:25,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:25,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:25,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-12-23 13:04:25,154 INFO L87 Difference]: Start difference. First operand 362 states and 1061 transitions. Second operand 20 states. [2020-12-23 13:04:33,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-23 13:04:33,801 INFO L93 Difference]: Finished difference Result 482 states and 1299 transitions. [2020-12-23 13:04:33,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-23 13:04:33,803 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 15 [2020-12-23 13:04:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-23 13:04:33,805 INFO L225 Difference]: With dead ends: 482 [2020-12-23 13:04:33,805 INFO L226 Difference]: Without dead ends: 479 [2020-12-23 13:04:33,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=397, Invalid=863, Unknown=0, NotChecked=0, Total=1260 [2020-12-23 13:04:33,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-12-23 13:04:33,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 363. [2020-12-23 13:04:33,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 363 states. [2020-12-23 13:04:33,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 1063 transitions. [2020-12-23 13:04:33,811 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 1063 transitions. Word has length 15 [2020-12-23 13:04:33,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-23 13:04:33,811 INFO L481 AbstractCegarLoop]: Abstraction has 363 states and 1063 transitions. [2020-12-23 13:04:33,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-23 13:04:33,811 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 1063 transitions. [2020-12-23 13:04:33,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-23 13:04:33,812 INFO L414 BasicCegarLoop]: Found error trace [2020-12-23 13:04:33,812 INFO L422 BasicCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-23 13:04:34,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-23 13:04:34,012 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-23 13:04:34,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-23 13:04:34,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1406588655, now seen corresponding path program 144 times [2020-12-23 13:04:34,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-23 13:04:34,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480405025] [2020-12-23 13:04:34,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-23 13:04:34,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-23 13:04:34,284 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 13:04:34,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480405025] [2020-12-23 13:04:34,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521965242] [2020-12-23 13:04:34,285 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 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 13:04:34,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-23 13:04:34,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-23 13:04:34,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-23 13:04:34,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-23 13:04:36,833 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 4 disjuncts [2020-12-23 13:04:36,836 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 6 disjuncts [2020-12-23 13:04:36,977 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 13:04:36,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-23 13:04:36,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2020-12-23 13:04:36,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262961533] [2020-12-23 13:04:36,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-23 13:04:36,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-23 13:04:36,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-23 13:04:36,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=268, Unknown=1, NotChecked=0, Total=380 [2020-12-23 13:04:36,979 INFO L87 Difference]: Start difference. First operand 363 states and 1063 transitions. Second operand 20 states.