/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c7e336b [2020-10-05 23:02:24,977 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-05 23:02:24,980 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-05 23:02:25,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-05 23:02:25,017 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-05 23:02:25,024 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-05 23:02:25,027 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-05 23:02:25,031 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-05 23:02:25,033 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-05 23:02:25,036 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-05 23:02:25,036 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-05 23:02:25,037 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-05 23:02:25,037 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-05 23:02:25,040 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-05 23:02:25,042 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-05 23:02:25,043 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-05 23:02:25,044 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-05 23:02:25,045 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-05 23:02:25,047 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-05 23:02:25,054 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-05 23:02:25,056 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-05 23:02:25,057 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-05 23:02:25,058 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-05 23:02:25,058 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-05 23:02:25,070 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-05 23:02:25,078 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-05 23:02:25,078 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-05 23:02:25,079 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-05 23:02:25,082 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-05 23:02:25,082 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-05 23:02:25,083 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-05 23:02:25,083 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-05 23:02:25,083 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-05 23:02:25,084 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-05 23:02:25,088 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-05 23:02:25,089 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-05 23:02:25,090 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-05 23:02:25,122 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-05 23:02:25,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-05 23:02:25,123 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-05 23:02:25,123 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-05 23:02:25,124 INFO L138 SettingsManager]: * Use SBE=true [2020-10-05 23:02:25,124 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-05 23:02:25,124 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-05 23:02:25,124 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-05 23:02:25,124 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-05 23:02:25,125 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-05 23:02:25,125 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-05 23:02:25,125 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-05 23:02:25,125 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-05 23:02:25,125 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-05 23:02:25,126 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-05 23:02:25,126 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-05 23:02:25,126 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-05 23:02:25,126 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-05 23:02:25,126 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-05 23:02:25,127 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-05 23:02:25,127 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-05 23:02:25,127 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 23:02:25,127 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-05 23:02:25,127 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-05 23:02:25,127 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-05 23:02:25,128 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-05 23:02:25,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-05 23:02:25,128 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-05 23:02:25,128 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-05 23:02:25,128 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-05 23:02:25,402 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-05 23:02:25,414 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-05 23:02:25,417 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-05 23:02:25,418 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-05 23:02:25,419 INFO L275 PluginConnector]: CDTParser initialized [2020-10-05 23:02:25,419 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-05 23:02:25,478 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcdae3a86/0eab814ae92246ec90962c9857a9a098/FLAG059ac0974 [2020-10-05 23:02:25,906 INFO L306 CDTParser]: Found 1 translation units. [2020-10-05 23:02:25,907 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-05 23:02:25,907 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-05 23:02:25,907 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-05 23:02:25,907 WARN L117 ultiparseSymbolTable]: System include stdbool.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-05 23:02:25,949 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcdae3a86/0eab814ae92246ec90962c9857a9a098/FLAG059ac0974 [2020-10-05 23:02:26,310 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcdae3a86/0eab814ae92246ec90962c9857a9a098 [2020-10-05 23:02:26,319 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-05 23:02:26,320 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-05 23:02:26,321 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-05 23:02:26,322 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-05 23:02:26,325 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-05 23:02:26,326 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:02:26" (1/1) ... [2020-10-05 23:02:26,329 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15e46ddb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:02:26, skipping insertion in model container [2020-10-05 23:02:26,329 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:02:26" (1/1) ... [2020-10-05 23:02:26,337 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-05 23:02:26,354 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-05 23:02:26,616 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 23:02:26,630 INFO L203 MainTranslator]: Completed pre-run [2020-10-05 23:02:26,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 23:02:26,661 INFO L208 MainTranslator]: Completed translation [2020-10-05 23:02:26,662 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:02:26 WrapperNode [2020-10-05 23:02:26,662 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-05 23:02:26,663 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-05 23:02:26,663 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-05 23:02:26,663 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-05 23:02:26,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:02:26" (1/1) ... [2020-10-05 23:02:26,677 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:02:26" (1/1) ... [2020-10-05 23:02:26,691 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-05 23:02:26,692 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-05 23:02:26,692 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-05 23:02:26,692 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-05 23:02:26,699 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:02:26" (1/1) ... [2020-10-05 23:02:26,699 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:02:26" (1/1) ... [2020-10-05 23:02:26,700 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:02:26" (1/1) ... [2020-10-05 23:02:26,701 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:02:26" (1/1) ... [2020-10-05 23:02:26,705 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:02:26" (1/1) ... [2020-10-05 23:02:26,709 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:02:26" (1/1) ... [2020-10-05 23:02:26,710 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:02:26" (1/1) ... [2020-10-05 23:02:26,712 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-05 23:02:26,713 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-05 23:02:26,713 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-05 23:02:26,713 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-05 23:02:26,714 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:02:26" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 23:02:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-05 23:02:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-05 23:02:26,776 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-05 23:02:26,776 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-05 23:02:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrement [2020-10-05 23:02:26,777 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrement [2020-10-05 23:02:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure firstIncrement [2020-10-05 23:02:26,777 INFO L138 BoogieDeclarations]: Found implementation of procedure firstIncrement [2020-10-05 23:02:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-05 23:02:26,777 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-05 23:02:26,779 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-05 23:02:27,024 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-05 23:02:27,024 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-05 23:02:27,027 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:02:27 BoogieIcfgContainer [2020-10-05 23:02:27,027 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-05 23:02:27,028 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-05 23:02:27,029 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-05 23:02:27,031 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-05 23:02:27,032 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 11:02:26" (1/3) ... [2020-10-05 23:02:27,032 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fc0f1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:02:27, skipping insertion in model container [2020-10-05 23:02:27,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:02:26" (2/3) ... [2020-10-05 23:02:27,033 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4fc0f1e3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:02:27, skipping insertion in model container [2020-10-05 23:02:27,033 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:02:27" (3/3) ... [2020-10-05 23:02:27,035 INFO L109 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.c [2020-10-05 23:02:27,048 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-05 23:02:27,048 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-05 23:02:27,057 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-05 23:02:27,058 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-05 23:02:27,087 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,088 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,088 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,088 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,089 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,089 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,089 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,090 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,090 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,090 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,090 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,091 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,091 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,091 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,092 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,092 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,092 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,093 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,093 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,093 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,093 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,094 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,097 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,097 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,098 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,098 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,098 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,102 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,103 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,103 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,103 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,103 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:02:27,125 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-05 23:02:27,146 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:02:27,147 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:02:27,147 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-05 23:02:27,147 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 23:02:27,147 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:02:27,147 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:02:27,148 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:02:27,148 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:02:27,164 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 56 transitions, 134 flow [2020-10-05 23:02:27,167 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 134 flow [2020-10-05 23:02:27,211 INFO L129 PetriNetUnfolder]: 5/56 cut-off events. [2020-10-05 23:02:27,212 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-05 23:02:27,217 INFO L80 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 56 events. 5/56 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2020-10-05 23:02:27,221 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 134 flow [2020-10-05 23:02:27,249 INFO L129 PetriNetUnfolder]: 5/56 cut-off events. [2020-10-05 23:02:27,249 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-05 23:02:27,252 INFO L80 FinitePrefix]: Finished finitePrefix Result has 67 conditions, 56 events. 5/56 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 68 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 33. Up to 3 conditions per place. [2020-10-05 23:02:27,254 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 528 [2020-10-05 23:02:27,255 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-10-05 23:02:28,050 INFO L206 etLargeBlockEncoding]: Checked pairs total: 426 [2020-10-05 23:02:28,051 INFO L214 etLargeBlockEncoding]: Total number of compositions: 32 [2020-10-05 23:02:28,056 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 24 transitions, 70 flow [2020-10-05 23:02:28,069 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 70 states. [2020-10-05 23:02:28,071 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-10-05 23:02:28,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:02:28,083 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:28,084 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:28,084 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:28,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:28,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1474833226, now seen corresponding path program 1 times [2020-10-05 23:02:28,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:28,104 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838298780] [2020-10-05 23:02:28,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:28,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:28,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:28,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838298780] [2020-10-05 23:02:28,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:02:28,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:02:28,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138153666] [2020-10-05 23:02:28,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:02:28,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:28,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:02:28,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:02:28,290 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 3 states. [2020-10-05 23:02:28,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:28,327 INFO L93 Difference]: Finished difference Result 96 states and 211 transitions. [2020-10-05 23:02:28,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:02:28,330 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-05 23:02:28,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:28,343 INFO L225 Difference]: With dead ends: 96 [2020-10-05 23:02:28,343 INFO L226 Difference]: Without dead ends: 95 [2020-10-05 23:02:28,345 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-05 23:02:28,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-05 23:02:28,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2020-10-05 23:02:28,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 23:02:28,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 180 transitions. [2020-10-05 23:02:28,393 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 180 transitions. Word has length 15 [2020-10-05 23:02:28,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:28,393 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 180 transitions. [2020-10-05 23:02:28,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:02:28,394 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 180 transitions. [2020-10-05 23:02:28,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:02:28,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:28,396 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:28,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-05 23:02:28,396 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:28,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:28,397 INFO L82 PathProgramCache]: Analyzing trace with hash -657301668, now seen corresponding path program 1 times [2020-10-05 23:02:28,397 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:28,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91760860] [2020-10-05 23:02:28,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:28,456 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:28,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91760860] [2020-10-05 23:02:28,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364097759] [2020-10-05 23:02:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:02:28,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:28,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-05 23:02:28,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:28,557 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:02:28,557 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-05 23:02:28,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-05 23:02:28,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426408185] [2020-10-05 23:02:28,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-05 23:02:28,560 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:28,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-05 23:02:28,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-05 23:02:28,561 INFO L87 Difference]: Start difference. First operand 82 states and 180 transitions. Second operand 3 states. [2020-10-05 23:02:28,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:28,577 INFO L93 Difference]: Finished difference Result 108 states and 242 transitions. [2020-10-05 23:02:28,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-05 23:02:28,578 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-05 23:02:28,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:28,580 INFO L225 Difference]: With dead ends: 108 [2020-10-05 23:02:28,580 INFO L226 Difference]: Without dead ends: 108 [2020-10-05 23:02:28,581 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-05 23:02:28,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-05 23:02:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2020-10-05 23:02:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-05 23:02:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 211 transitions. [2020-10-05 23:02:28,594 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 211 transitions. Word has length 17 [2020-10-05 23:02:28,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:28,595 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 211 transitions. [2020-10-05 23:02:28,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-05 23:02:28,595 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 211 transitions. [2020-10-05 23:02:28,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:02:28,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:28,597 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:28,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-05 23:02:28,813 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:28,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:28,814 INFO L82 PathProgramCache]: Analyzing trace with hash 1653958726, now seen corresponding path program 1 times [2020-10-05 23:02:28,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:28,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318190507] [2020-10-05 23:02:28,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:28,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:28,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:28,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318190507] [2020-10-05 23:02:28,861 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131156506] [2020-10-05 23:02:28,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:02:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:28,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-05 23:02:28,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:28,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:02:28,941 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:28,941 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-05 23:02:28,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078212065] [2020-10-05 23:02:28,942 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:02:28,942 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:28,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:02:28,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:02:28,943 INFO L87 Difference]: Start difference. First operand 95 states and 211 transitions. Second operand 6 states. [2020-10-05 23:02:29,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:29,047 INFO L93 Difference]: Finished difference Result 197 states and 454 transitions. [2020-10-05 23:02:29,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 23:02:29,048 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-05 23:02:29,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:29,050 INFO L225 Difference]: With dead ends: 197 [2020-10-05 23:02:29,051 INFO L226 Difference]: Without dead ends: 197 [2020-10-05 23:02:29,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:02:29,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-05 23:02:29,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 159. [2020-10-05 23:02:29,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-05 23:02:29,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 363 transitions. [2020-10-05 23:02:29,068 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 363 transitions. Word has length 19 [2020-10-05 23:02:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:29,068 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 363 transitions. [2020-10-05 23:02:29,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:02:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 363 transitions. [2020-10-05 23:02:29,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:02:29,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:29,074 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:29,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:02:29,288 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:29,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:29,288 INFO L82 PathProgramCache]: Analyzing trace with hash 2009767926, now seen corresponding path program 2 times [2020-10-05 23:02:29,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:29,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312910756] [2020-10-05 23:02:29,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:29,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-05 23:02:29,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312910756] [2020-10-05 23:02:29,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473559120] [2020-10-05 23:02:29,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:29,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:02:29,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:29,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:02:29,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:29,471 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-05 23:02:29,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:29,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 23:02:29,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739423842] [2020-10-05 23:02:29,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:02:29,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:29,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:02:29,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:02:29,474 INFO L87 Difference]: Start difference. First operand 159 states and 363 transitions. Second operand 6 states. [2020-10-05 23:02:29,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:29,507 INFO L93 Difference]: Finished difference Result 210 states and 486 transitions. [2020-10-05 23:02:29,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:02:29,509 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-05 23:02:29,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:29,513 INFO L225 Difference]: With dead ends: 210 [2020-10-05 23:02:29,514 INFO L226 Difference]: Without dead ends: 210 [2020-10-05 23:02:29,514 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:02:29,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-05 23:02:29,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 193. [2020-10-05 23:02:29,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-05 23:02:29,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 445 transitions. [2020-10-05 23:02:29,538 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 445 transitions. Word has length 23 [2020-10-05 23:02:29,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:29,538 INFO L479 AbstractCegarLoop]: Abstraction has 193 states and 445 transitions. [2020-10-05 23:02:29,538 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:02:29,539 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 445 transitions. [2020-10-05 23:02:29,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:02:29,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:29,545 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:29,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:02:29,758 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:29,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:29,759 INFO L82 PathProgramCache]: Analyzing trace with hash -275132064, now seen corresponding path program 3 times [2020-10-05 23:02:29,760 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:29,760 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533689164] [2020-10-05 23:02:29,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:29,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-05 23:02:29,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533689164] [2020-10-05 23:02:29,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051147931] [2020-10-05 23:02:29,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:29,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 23:02:29,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:29,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:02:29,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:29,955 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-05 23:02:29,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:29,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 23:02:29,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463846448] [2020-10-05 23:02:29,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 23:02:29,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:29,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 23:02:29,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-05 23:02:29,958 INFO L87 Difference]: Start difference. First operand 193 states and 445 transitions. Second operand 7 states. [2020-10-05 23:02:29,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:29,988 INFO L93 Difference]: Finished difference Result 244 states and 568 transitions. [2020-10-05 23:02:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 23:02:29,989 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-05 23:02:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:29,991 INFO L225 Difference]: With dead ends: 244 [2020-10-05 23:02:29,991 INFO L226 Difference]: Without dead ends: 244 [2020-10-05 23:02:29,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-05 23:02:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-05 23:02:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2020-10-05 23:02:30,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-05 23:02:30,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 527 transitions. [2020-10-05 23:02:30,004 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 527 transitions. Word has length 25 [2020-10-05 23:02:30,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:30,004 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 527 transitions. [2020-10-05 23:02:30,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 23:02:30,005 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 527 transitions. [2020-10-05 23:02:30,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:02:30,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:30,007 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:30,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:02:30,220 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:30,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:30,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1335734198, now seen corresponding path program 4 times [2020-10-05 23:02:30,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:30,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631200553] [2020-10-05 23:02:30,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:30,311 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-05 23:02:30,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631200553] [2020-10-05 23:02:30,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564927309] [2020-10-05 23:02:30,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:30,353 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:02:30,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:30,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-05 23:02:30,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-05 23:02:30,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:30,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 23:02:30,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867037086] [2020-10-05 23:02:30,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:02:30,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:30,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:02:30,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:02:30,387 INFO L87 Difference]: Start difference. First operand 227 states and 527 transitions. Second operand 8 states. [2020-10-05 23:02:30,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:30,412 INFO L93 Difference]: Finished difference Result 261 states and 609 transitions. [2020-10-05 23:02:30,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 23:02:30,413 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-05 23:02:30,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:30,415 INFO L225 Difference]: With dead ends: 261 [2020-10-05 23:02:30,415 INFO L226 Difference]: Without dead ends: 261 [2020-10-05 23:02:30,415 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:02:30,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-05 23:02:30,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2020-10-05 23:02:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-05 23:02:30,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 609 transitions. [2020-10-05 23:02:30,426 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 609 transitions. Word has length 27 [2020-10-05 23:02:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:30,426 INFO L479 AbstractCegarLoop]: Abstraction has 261 states and 609 transitions. [2020-10-05 23:02:30,426 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:02:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 609 transitions. [2020-10-05 23:02:30,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-05 23:02:30,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:30,428 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:30,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-05 23:02:30,643 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:30,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:30,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1627831476, now seen corresponding path program 5 times [2020-10-05 23:02:30,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:30,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181156759] [2020-10-05 23:02:30,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:30,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:30,689 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-05 23:02:30,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181156759] [2020-10-05 23:02:30,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93843319] [2020-10-05 23:02:30,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:30,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-05 23:02:30,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:30,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-05 23:02:30,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:30,759 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-05 23:02:30,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:30,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 23:02:30,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569623279] [2020-10-05 23:02:30,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:02:30,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:30,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:02:30,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:02:30,761 INFO L87 Difference]: Start difference. First operand 261 states and 609 transitions. Second operand 6 states. [2020-10-05 23:02:30,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:30,781 INFO L93 Difference]: Finished difference Result 354 states and 834 transitions. [2020-10-05 23:02:30,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:02:30,782 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-05 23:02:30,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:30,784 INFO L225 Difference]: With dead ends: 354 [2020-10-05 23:02:30,785 INFO L226 Difference]: Without dead ends: 354 [2020-10-05 23:02:30,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:02:30,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-05 23:02:30,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 323. [2020-10-05 23:02:30,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-05 23:02:30,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 759 transitions. [2020-10-05 23:02:30,795 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 759 transitions. Word has length 29 [2020-10-05 23:02:30,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:30,795 INFO L479 AbstractCegarLoop]: Abstraction has 323 states and 759 transitions. [2020-10-05 23:02:30,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:02:30,796 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 759 transitions. [2020-10-05 23:02:30,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-05 23:02:30,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:30,797 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:31,011 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:02:31,012 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:31,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:31,013 INFO L82 PathProgramCache]: Analyzing trace with hash 827854074, now seen corresponding path program 6 times [2020-10-05 23:02:31,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:31,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236898931] [2020-10-05 23:02:31,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:31,063 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-05 23:02:31,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236898931] [2020-10-05 23:02:31,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972853251] [2020-10-05 23:02:31,064 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:31,132 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-05 23:02:31,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:31,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-05 23:02:31,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-05 23:02:31,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:31,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 23:02:31,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667667148] [2020-10-05 23:02:31,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 23:02:31,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:31,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 23:02:31,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-05 23:02:31,159 INFO L87 Difference]: Start difference. First operand 323 states and 759 transitions. Second operand 7 states. [2020-10-05 23:02:31,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:31,182 INFO L93 Difference]: Finished difference Result 416 states and 984 transitions. [2020-10-05 23:02:31,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-05 23:02:31,182 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-05 23:02:31,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:31,185 INFO L225 Difference]: With dead ends: 416 [2020-10-05 23:02:31,185 INFO L226 Difference]: Without dead ends: 416 [2020-10-05 23:02:31,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-05 23:02:31,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-05 23:02:31,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 385. [2020-10-05 23:02:31,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-05 23:02:31,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 909 transitions. [2020-10-05 23:02:31,197 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 909 transitions. Word has length 31 [2020-10-05 23:02:31,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:31,198 INFO L479 AbstractCegarLoop]: Abstraction has 385 states and 909 transitions. [2020-10-05 23:02:31,198 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 23:02:31,198 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 909 transitions. [2020-10-05 23:02:31,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-05 23:02:31,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:31,200 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:31,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:02:31,414 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:31,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:31,415 INFO L82 PathProgramCache]: Analyzing trace with hash 848716736, now seen corresponding path program 7 times [2020-10-05 23:02:31,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:31,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182168986] [2020-10-05 23:02:31,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:31,496 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-05 23:02:31,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182168986] [2020-10-05 23:02:31,497 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766482411] [2020-10-05 23:02:31,497 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:31,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:31,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-05 23:02:31,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:31,564 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-05 23:02:31,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:31,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 23:02:31,565 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012054806] [2020-10-05 23:02:31,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:02:31,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:31,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:02:31,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:02:31,567 INFO L87 Difference]: Start difference. First operand 385 states and 909 transitions. Second operand 8 states. [2020-10-05 23:02:31,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:31,597 INFO L93 Difference]: Finished difference Result 447 states and 1059 transitions. [2020-10-05 23:02:31,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 23:02:31,597 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-05 23:02:31,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:31,601 INFO L225 Difference]: With dead ends: 447 [2020-10-05 23:02:31,601 INFO L226 Difference]: Without dead ends: 447 [2020-10-05 23:02:31,601 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:02:31,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-05 23:02:31,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2020-10-05 23:02:31,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-10-05 23:02:31,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1059 transitions. [2020-10-05 23:02:31,615 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1059 transitions. Word has length 33 [2020-10-05 23:02:31,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:31,615 INFO L479 AbstractCegarLoop]: Abstraction has 447 states and 1059 transitions. [2020-10-05 23:02:31,616 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:02:31,616 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1059 transitions. [2020-10-05 23:02:31,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:31,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:31,618 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:31,831 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-05 23:02:31,832 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:31,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:31,832 INFO L82 PathProgramCache]: Analyzing trace with hash -577101562, now seen corresponding path program 8 times [2020-10-05 23:02:31,832 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:31,832 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519222394] [2020-10-05 23:02:31,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:31,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:32,102 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 41 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:32,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519222394] [2020-10-05 23:02:32,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806452327] [2020-10-05 23:02:32,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:32,145 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:02:32,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:32,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:02:32,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:32,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-05 23:02:32,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 23 [2020-10-05 23:02:32,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241896749] [2020-10-05 23:02:32,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:02:32,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:32,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:02:32,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:02:32,211 INFO L87 Difference]: Start difference. First operand 447 states and 1059 transitions. Second operand 23 states. [2020-10-05 23:02:32,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:32,971 INFO L93 Difference]: Finished difference Result 1728 states and 4029 transitions. [2020-10-05 23:02:32,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:02:32,972 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-05 23:02:32,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:32,979 INFO L225 Difference]: With dead ends: 1728 [2020-10-05 23:02:32,980 INFO L226 Difference]: Without dead ends: 876 [2020-10-05 23:02:32,981 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=720, Invalid=1632, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:02:32,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2020-10-05 23:02:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 585. [2020-10-05 23:02:32,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-10-05 23:02:32,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1403 transitions. [2020-10-05 23:02:32,999 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1403 transitions. Word has length 35 [2020-10-05 23:02:33,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:33,000 INFO L479 AbstractCegarLoop]: Abstraction has 585 states and 1403 transitions. [2020-10-05 23:02:33,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:02:33,000 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1403 transitions. [2020-10-05 23:02:33,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:33,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:33,003 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:33,216 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:02:33,217 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:33,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:33,217 INFO L82 PathProgramCache]: Analyzing trace with hash 915971432, now seen corresponding path program 9 times [2020-10-05 23:02:33,217 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:33,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1727217413] [2020-10-05 23:02:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:33,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1727217413] [2020-10-05 23:02:33,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052029555] [2020-10-05 23:02:33,454 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:33,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 23:02:33,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:33,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:02:33,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:33,589 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:33,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:33,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-05 23:02:33,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410207888] [2020-10-05 23:02:33,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:02:33,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:33,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:02:33,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:02:33,592 INFO L87 Difference]: Start difference. First operand 585 states and 1403 transitions. Second operand 23 states. [2020-10-05 23:02:34,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:34,215 INFO L93 Difference]: Finished difference Result 1731 states and 4053 transitions. [2020-10-05 23:02:34,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:02:34,215 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-05 23:02:34,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:34,221 INFO L225 Difference]: With dead ends: 1731 [2020-10-05 23:02:34,221 INFO L226 Difference]: Without dead ends: 816 [2020-10-05 23:02:34,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=566, Invalid=1414, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:02:34,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2020-10-05 23:02:34,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 569. [2020-10-05 23:02:34,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-10-05 23:02:34,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1355 transitions. [2020-10-05 23:02:34,238 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1355 transitions. Word has length 35 [2020-10-05 23:02:34,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:34,238 INFO L479 AbstractCegarLoop]: Abstraction has 569 states and 1355 transitions. [2020-10-05 23:02:34,238 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:02:34,238 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1355 transitions. [2020-10-05 23:02:34,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:34,240 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:34,240 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:34,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:02:34,455 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:34,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:34,456 INFO L82 PathProgramCache]: Analyzing trace with hash -570341976, now seen corresponding path program 10 times [2020-10-05 23:02:34,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:34,457 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416959413] [2020-10-05 23:02:34,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:34,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:34,696 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:34,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416959413] [2020-10-05 23:02:34,697 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182285454] [2020-10-05 23:02:34,697 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:34,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:02:34,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:34,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:02:34,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:34,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:34,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-05 23:02:34,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376226120] [2020-10-05 23:02:34,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:02:34,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:34,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:02:34,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:02:34,807 INFO L87 Difference]: Start difference. First operand 569 states and 1355 transitions. Second operand 23 states. [2020-10-05 23:02:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:35,422 INFO L93 Difference]: Finished difference Result 2131 states and 4974 transitions. [2020-10-05 23:02:35,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:02:35,422 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-05 23:02:35,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:35,430 INFO L225 Difference]: With dead ends: 2131 [2020-10-05 23:02:35,430 INFO L226 Difference]: Without dead ends: 792 [2020-10-05 23:02:35,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=558, Invalid=1422, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:02:35,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-10-05 23:02:35,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 553. [2020-10-05 23:02:35,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-10-05 23:02:35,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1307 transitions. [2020-10-05 23:02:35,459 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1307 transitions. Word has length 35 [2020-10-05 23:02:35,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:35,460 INFO L479 AbstractCegarLoop]: Abstraction has 553 states and 1307 transitions. [2020-10-05 23:02:35,460 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:02:35,460 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1307 transitions. [2020-10-05 23:02:35,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:35,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:35,462 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:35,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-05 23:02:35,677 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:35,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:35,677 INFO L82 PathProgramCache]: Analyzing trace with hash 1306582504, now seen corresponding path program 11 times [2020-10-05 23:02:35,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:35,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436076482] [2020-10-05 23:02:35,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:35,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:35,917 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:35,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436076482] [2020-10-05 23:02:35,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568529261] [2020-10-05 23:02:35,918 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:35,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-05 23:02:35,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:35,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:02:35,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:36,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:36,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-05 23:02:36,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845811320] [2020-10-05 23:02:36,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:02:36,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:36,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:02:36,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:02:36,004 INFO L87 Difference]: Start difference. First operand 553 states and 1307 transitions. Second operand 23 states. [2020-10-05 23:02:36,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:36,614 INFO L93 Difference]: Finished difference Result 2670 states and 6229 transitions. [2020-10-05 23:02:36,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:02:36,615 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-05 23:02:36,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:36,620 INFO L225 Difference]: With dead ends: 2670 [2020-10-05 23:02:36,620 INFO L226 Difference]: Without dead ends: 768 [2020-10-05 23:02:36,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=588, Invalid=1482, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 23:02:36,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-10-05 23:02:36,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 537. [2020-10-05 23:02:36,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-05 23:02:36,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1259 transitions. [2020-10-05 23:02:36,636 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1259 transitions. Word has length 35 [2020-10-05 23:02:36,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:36,636 INFO L479 AbstractCegarLoop]: Abstraction has 537 states and 1259 transitions. [2020-10-05 23:02:36,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:02:36,636 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1259 transitions. [2020-10-05 23:02:36,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:36,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:36,638 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:36,852 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-05 23:02:36,853 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:36,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:36,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1144743464, now seen corresponding path program 12 times [2020-10-05 23:02:36,854 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:36,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804382385] [2020-10-05 23:02:36,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:37,069 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:37,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804382385] [2020-10-05 23:02:37,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813321370] [2020-10-05 23:02:37,070 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:37,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 23:02:37,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:37,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:02:37,117 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:37,170 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:37,170 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:37,170 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-05 23:02:37,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516804818] [2020-10-05 23:02:37,171 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:02:37,171 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:37,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:02:37,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:02:37,172 INFO L87 Difference]: Start difference. First operand 537 states and 1259 transitions. Second operand 23 states. [2020-10-05 23:02:38,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:38,002 INFO L93 Difference]: Finished difference Result 3250 states and 7573 transitions. [2020-10-05 23:02:38,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 23:02:38,003 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-05 23:02:38,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:38,016 INFO L225 Difference]: With dead ends: 3250 [2020-10-05 23:02:38,016 INFO L226 Difference]: Without dead ends: 2437 [2020-10-05 23:02:38,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2020-10-05 23:02:38,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2020-10-05 23:02:38,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1276. [2020-10-05 23:02:38,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1276 states. [2020-10-05 23:02:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 3101 transitions. [2020-10-05 23:02:38,083 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 3101 transitions. Word has length 35 [2020-10-05 23:02:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:38,083 INFO L479 AbstractCegarLoop]: Abstraction has 1276 states and 3101 transitions. [2020-10-05 23:02:38,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:02:38,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 3101 transitions. [2020-10-05 23:02:38,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:38,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:38,087 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:38,300 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-05 23:02:38,300 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:38,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:38,301 INFO L82 PathProgramCache]: Analyzing trace with hash 909108414, now seen corresponding path program 13 times [2020-10-05 23:02:38,301 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:38,302 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294411312] [2020-10-05 23:02:38,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:38,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:38,490 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:02:38,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294411312] [2020-10-05 23:02:38,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064401781] [2020-10-05 23:02:38,491 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:38,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:02:38,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:02:38,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:38,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-05 23:02:38,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342656363] [2020-10-05 23:02:38,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:02:38,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:38,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:02:38,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:02:38,583 INFO L87 Difference]: Start difference. First operand 1276 states and 3101 transitions. Second operand 21 states. [2020-10-05 23:02:39,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:39,295 INFO L93 Difference]: Finished difference Result 2721 states and 6420 transitions. [2020-10-05 23:02:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 23:02:39,296 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-05 23:02:39,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:39,306 INFO L225 Difference]: With dead ends: 2721 [2020-10-05 23:02:39,306 INFO L226 Difference]: Without dead ends: 2040 [2020-10-05 23:02:39,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=690, Invalid=1860, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 23:02:39,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2020-10-05 23:02:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1192. [2020-10-05 23:02:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2020-10-05 23:02:39,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2873 transitions. [2020-10-05 23:02:39,357 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2873 transitions. Word has length 35 [2020-10-05 23:02:39,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:39,358 INFO L479 AbstractCegarLoop]: Abstraction has 1192 states and 2873 transitions. [2020-10-05 23:02:39,358 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:02:39,358 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2873 transitions. [2020-10-05 23:02:39,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:39,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:39,361 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:39,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:02:39,574 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:39,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:39,575 INFO L82 PathProgramCache]: Analyzing trace with hash 1383117118, now seen corresponding path program 14 times [2020-10-05 23:02:39,575 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:39,575 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796370463] [2020-10-05 23:02:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-05 23:02:39,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796370463] [2020-10-05 23:02:39,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023181804] [2020-10-05 23:02:39,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:39,762 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:02:39,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:39,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:02:39,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:39,801 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-05 23:02:39,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:39,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-05 23:02:39,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462490223] [2020-10-05 23:02:39,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:02:39,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:39,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:02:39,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:02:39,803 INFO L87 Difference]: Start difference. First operand 1192 states and 2873 transitions. Second operand 19 states. [2020-10-05 23:02:40,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:40,361 INFO L93 Difference]: Finished difference Result 2550 states and 5976 transitions. [2020-10-05 23:02:40,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:02:40,362 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-05 23:02:40,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:40,370 INFO L225 Difference]: With dead ends: 2550 [2020-10-05 23:02:40,370 INFO L226 Difference]: Without dead ends: 1781 [2020-10-05 23:02:40,371 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=511, Invalid=1381, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:02:40,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2020-10-05 23:02:40,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1058. [2020-10-05 23:02:40,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1058 states. [2020-10-05 23:02:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 2526 transitions. [2020-10-05 23:02:40,398 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 2526 transitions. Word has length 35 [2020-10-05 23:02:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:40,399 INFO L479 AbstractCegarLoop]: Abstraction has 1058 states and 2526 transitions. [2020-10-05 23:02:40,399 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:02:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 2526 transitions. [2020-10-05 23:02:40,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:40,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:40,402 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:40,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-05 23:02:40,617 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:40,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:40,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1638948286, now seen corresponding path program 15 times [2020-10-05 23:02:40,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:40,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182342230] [2020-10-05 23:02:40,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:40,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:40,752 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-05 23:02:40,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182342230] [2020-10-05 23:02:40,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206685247] [2020-10-05 23:02:40,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:40,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 23:02:40,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:40,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:02:40,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-05 23:02:40,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:40,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-05 23:02:40,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640365200] [2020-10-05 23:02:40,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:02:40,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:40,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:02:40,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:02:40,881 INFO L87 Difference]: Start difference. First operand 1058 states and 2526 transitions. Second operand 17 states. [2020-10-05 23:02:41,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:41,311 INFO L93 Difference]: Finished difference Result 2371 states and 5518 transitions. [2020-10-05 23:02:41,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:02:41,312 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-05 23:02:41,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:41,318 INFO L225 Difference]: With dead ends: 2371 [2020-10-05 23:02:41,318 INFO L226 Difference]: Without dead ends: 1444 [2020-10-05 23:02:41,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:02:41,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2020-10-05 23:02:41,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 874. [2020-10-05 23:02:41,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-10-05 23:02:41,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2060 transitions. [2020-10-05 23:02:41,338 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2060 transitions. Word has length 35 [2020-10-05 23:02:41,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:41,339 INFO L479 AbstractCegarLoop]: Abstraction has 874 states and 2060 transitions. [2020-10-05 23:02:41,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:02:41,339 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2060 transitions. [2020-10-05 23:02:41,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:41,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:41,341 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:41,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-05 23:02:41,556 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:41,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1615402434, now seen corresponding path program 16 times [2020-10-05 23:02:41,557 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:41,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018995179] [2020-10-05 23:02:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:41,651 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-05 23:02:41,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018995179] [2020-10-05 23:02:41,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [883858905] [2020-10-05 23:02:41,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:41,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:02:41,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:41,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:02:41,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-05 23:02:41,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:41,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-10-05 23:02:41,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978391785] [2020-10-05 23:02:41,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:02:41,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:41,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:02:41,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:02:41,715 INFO L87 Difference]: Start difference. First operand 874 states and 2060 transitions. Second operand 15 states. [2020-10-05 23:02:42,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:42,026 INFO L93 Difference]: Finished difference Result 1669 states and 3808 transitions. [2020-10-05 23:02:42,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:02:42,026 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-05 23:02:42,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:42,030 INFO L225 Difference]: With dead ends: 1669 [2020-10-05 23:02:42,030 INFO L226 Difference]: Without dead ends: 744 [2020-10-05 23:02:42,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2020-10-05 23:02:42,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-05 23:02:42,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 521. [2020-10-05 23:02:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-05 23:02:42,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1211 transitions. [2020-10-05 23:02:42,041 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1211 transitions. Word has length 35 [2020-10-05 23:02:42,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:42,041 INFO L479 AbstractCegarLoop]: Abstraction has 521 states and 1211 transitions. [2020-10-05 23:02:42,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:02:42,041 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1211 transitions. [2020-10-05 23:02:42,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:42,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:42,043 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:42,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-05 23:02:42,258 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:42,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:42,258 INFO L82 PathProgramCache]: Analyzing trace with hash 236248680, now seen corresponding path program 17 times [2020-10-05 23:02:42,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:42,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813478005] [2020-10-05 23:02:42,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:42,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:42,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813478005] [2020-10-05 23:02:42,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9243269] [2020-10-05 23:02:42,486 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:42,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 23:02:42,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:42,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:02:42,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:42,563 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:42,563 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:42,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-05 23:02:42,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933772548] [2020-10-05 23:02:42,564 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:02:42,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:42,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:02:42,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:02:42,565 INFO L87 Difference]: Start difference. First operand 521 states and 1211 transitions. Second operand 23 states. [2020-10-05 23:02:43,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:43,125 INFO L93 Difference]: Finished difference Result 1734 states and 4025 transitions. [2020-10-05 23:02:43,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:02:43,125 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-05 23:02:43,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:43,130 INFO L225 Difference]: With dead ends: 1734 [2020-10-05 23:02:43,131 INFO L226 Difference]: Without dead ends: 894 [2020-10-05 23:02:43,131 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=544, Invalid=1348, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:02:43,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-10-05 23:02:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 582. [2020-10-05 23:02:43,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2020-10-05 23:02:43,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1364 transitions. [2020-10-05 23:02:43,143 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1364 transitions. Word has length 35 [2020-10-05 23:02:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:43,144 INFO L479 AbstractCegarLoop]: Abstraction has 582 states and 1364 transitions. [2020-10-05 23:02:43,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:02:43,144 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1364 transitions. [2020-10-05 23:02:43,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:43,145 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:43,145 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:43,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:02:43,361 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:43,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:43,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1268277900, now seen corresponding path program 18 times [2020-10-05 23:02:43,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:43,361 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434794273] [2020-10-05 23:02:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:43,558 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:43,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434794273] [2020-10-05 23:02:43,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953241794] [2020-10-05 23:02:43,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:43,603 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 23:02:43,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:43,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:02:43,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:43,660 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:43,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:43,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-05 23:02:43,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786471469] [2020-10-05 23:02:43,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:02:43,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:43,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:02:43,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:02:43,662 INFO L87 Difference]: Start difference. First operand 582 states and 1364 transitions. Second operand 23 states. [2020-10-05 23:02:44,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:44,254 INFO L93 Difference]: Finished difference Result 1717 states and 3982 transitions. [2020-10-05 23:02:44,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:02:44,255 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-05 23:02:44,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:44,259 INFO L225 Difference]: With dead ends: 1717 [2020-10-05 23:02:44,259 INFO L226 Difference]: Without dead ends: 774 [2020-10-05 23:02:44,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=538, Invalid=1354, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:02:44,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-10-05 23:02:44,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 538. [2020-10-05 23:02:44,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2020-10-05 23:02:44,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1256 transitions. [2020-10-05 23:02:44,272 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1256 transitions. Word has length 35 [2020-10-05 23:02:44,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:44,273 INFO L479 AbstractCegarLoop]: Abstraction has 538 states and 1256 transitions. [2020-10-05 23:02:44,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:02:44,273 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1256 transitions. [2020-10-05 23:02:44,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:44,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:44,274 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:44,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:02:44,490 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:44,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:44,490 INFO L82 PathProgramCache]: Analyzing trace with hash -905226112, now seen corresponding path program 19 times [2020-10-05 23:02:44,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:44,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013888946] [2020-10-05 23:02:44,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:44,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:44,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013888946] [2020-10-05 23:02:44,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305267239] [2020-10-05 23:02:44,694 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:44,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:02:44,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:44,787 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:44,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:44,788 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-05 23:02:44,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394741428] [2020-10-05 23:02:44,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:02:44,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:44,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:02:44,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:02:44,789 INFO L87 Difference]: Start difference. First operand 538 states and 1256 transitions. Second operand 23 states. [2020-10-05 23:02:45,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:45,403 INFO L93 Difference]: Finished difference Result 2063 states and 4783 transitions. [2020-10-05 23:02:45,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:02:45,404 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-05 23:02:45,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:45,408 INFO L225 Difference]: With dead ends: 2063 [2020-10-05 23:02:45,408 INFO L226 Difference]: Without dead ends: 716 [2020-10-05 23:02:45,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=569, Invalid=1411, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:02:45,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-10-05 23:02:45,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 494. [2020-10-05 23:02:45,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-10-05 23:02:45,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1148 transitions. [2020-10-05 23:02:45,418 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1148 transitions. Word has length 35 [2020-10-05 23:02:45,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:45,418 INFO L479 AbstractCegarLoop]: Abstraction has 494 states and 1148 transitions. [2020-10-05 23:02:45,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:02:45,418 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1148 transitions. [2020-10-05 23:02:45,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:45,420 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:45,420 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:45,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-05 23:02:45,635 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:45,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:45,636 INFO L82 PathProgramCache]: Analyzing trace with hash 95191180, now seen corresponding path program 20 times [2020-10-05 23:02:45,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:45,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145060380] [2020-10-05 23:02:45,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:45,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:45,841 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:45,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145060380] [2020-10-05 23:02:45,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921813714] [2020-10-05 23:02:45,842 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:45,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:02:45,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:45,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:02:45,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:45,917 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:45,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:45,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-05 23:02:45,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295346585] [2020-10-05 23:02:45,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:02:45,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:45,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:02:45,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:02:45,919 INFO L87 Difference]: Start difference. First operand 494 states and 1148 transitions. Second operand 23 states. [2020-10-05 23:02:46,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:46,489 INFO L93 Difference]: Finished difference Result 2541 states and 5902 transitions. [2020-10-05 23:02:46,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:02:46,490 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-05 23:02:46,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:46,493 INFO L225 Difference]: With dead ends: 2541 [2020-10-05 23:02:46,493 INFO L226 Difference]: Without dead ends: 658 [2020-10-05 23:02:46,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 23:02:46,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-05 23:02:46,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 450. [2020-10-05 23:02:46,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-05 23:02:46,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1040 transitions. [2020-10-05 23:02:46,502 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1040 transitions. Word has length 35 [2020-10-05 23:02:46,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:46,502 INFO L479 AbstractCegarLoop]: Abstraction has 450 states and 1040 transitions. [2020-10-05 23:02:46,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:02:46,502 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1040 transitions. [2020-10-05 23:02:46,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:46,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:46,504 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:46,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-05 23:02:46,720 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:46,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:46,720 INFO L82 PathProgramCache]: Analyzing trace with hash -576465512, now seen corresponding path program 21 times [2020-10-05 23:02:46,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:46,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936881517] [2020-10-05 23:02:46,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:46,932 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:46,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936881517] [2020-10-05 23:02:46,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454155864] [2020-10-05 23:02:46,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:46,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 23:02:46,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:46,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:02:46,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:47,008 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:47,008 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:47,008 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-05 23:02:47,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994525226] [2020-10-05 23:02:47,009 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:02:47,009 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:47,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:02:47,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:02:47,010 INFO L87 Difference]: Start difference. First operand 450 states and 1040 transitions. Second operand 23 states. [2020-10-05 23:02:47,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:47,804 INFO L93 Difference]: Finished difference Result 2473 states and 5749 transitions. [2020-10-05 23:02:47,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-05 23:02:47,804 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-05 23:02:47,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:47,813 INFO L225 Difference]: With dead ends: 2473 [2020-10-05 23:02:47,813 INFO L226 Difference]: Without dead ends: 1507 [2020-10-05 23:02:47,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 683 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=823, Invalid=2257, Unknown=0, NotChecked=0, Total=3080 [2020-10-05 23:02:47,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2020-10-05 23:02:47,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 771. [2020-10-05 23:02:47,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2020-10-05 23:02:47,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1835 transitions. [2020-10-05 23:02:47,835 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1835 transitions. Word has length 35 [2020-10-05 23:02:47,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:47,835 INFO L479 AbstractCegarLoop]: Abstraction has 771 states and 1835 transitions. [2020-10-05 23:02:47,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:02:47,835 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1835 transitions. [2020-10-05 23:02:47,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:47,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:47,837 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:48,052 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:02:48,053 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:48,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:48,053 INFO L82 PathProgramCache]: Analyzing trace with hash -365571194, now seen corresponding path program 22 times [2020-10-05 23:02:48,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:48,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32643655] [2020-10-05 23:02:48,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:48,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:48,208 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:48,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32643655] [2020-10-05 23:02:48,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166489792] [2020-10-05 23:02:48,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:48,242 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:02:48,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:48,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:02:48,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:48,274 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:02:48,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:48,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-05 23:02:48,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591548174] [2020-10-05 23:02:48,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:02:48,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:48,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:02:48,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:02:48,275 INFO L87 Difference]: Start difference. First operand 771 states and 1835 transitions. Second operand 21 states. [2020-10-05 23:02:48,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:48,911 INFO L93 Difference]: Finished difference Result 1951 states and 4562 transitions. [2020-10-05 23:02:48,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:02:48,912 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-05 23:02:48,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:48,916 INFO L225 Difference]: With dead ends: 1951 [2020-10-05 23:02:48,916 INFO L226 Difference]: Without dead ends: 1081 [2020-10-05 23:02:48,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=628, Invalid=1724, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:02:48,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2020-10-05 23:02:48,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 637. [2020-10-05 23:02:48,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-10-05 23:02:48,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1488 transitions. [2020-10-05 23:02:48,931 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1488 transitions. Word has length 35 [2020-10-05 23:02:48,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:48,931 INFO L479 AbstractCegarLoop]: Abstraction has 637 states and 1488 transitions. [2020-10-05 23:02:48,931 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:02:48,932 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1488 transitions. [2020-10-05 23:02:48,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:48,933 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:48,933 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:49,142 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-05 23:02:49,143 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:49,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:49,143 INFO L82 PathProgramCache]: Analyzing trace with hash 2092017522, now seen corresponding path program 23 times [2020-10-05 23:02:49,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:49,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641378283] [2020-10-05 23:02:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:49,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:49,273 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:02:49,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641378283] [2020-10-05 23:02:49,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1726893344] [2020-10-05 23:02:49,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:49,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 23:02:49,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:49,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:02:49,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:49,345 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-05 23:02:49,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:49,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-05 23:02:49,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341744916] [2020-10-05 23:02:49,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:02:49,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:49,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:02:49,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:02:49,351 INFO L87 Difference]: Start difference. First operand 637 states and 1488 transitions. Second operand 19 states. [2020-10-05 23:02:49,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:49,916 INFO L93 Difference]: Finished difference Result 1790 states and 4143 transitions. [2020-10-05 23:02:49,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:02:49,917 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-05 23:02:49,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:49,921 INFO L225 Difference]: With dead ends: 1790 [2020-10-05 23:02:49,921 INFO L226 Difference]: Without dead ends: 744 [2020-10-05 23:02:49,929 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=461, Invalid=1261, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:02:49,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-05 23:02:49,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 453. [2020-10-05 23:02:49,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-05 23:02:49,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1022 transitions. [2020-10-05 23:02:49,945 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1022 transitions. Word has length 35 [2020-10-05 23:02:49,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:49,946 INFO L479 AbstractCegarLoop]: Abstraction has 453 states and 1022 transitions. [2020-10-05 23:02:49,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:02:49,946 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1022 transitions. [2020-10-05 23:02:49,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-05 23:02:49,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:02:49,948 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:02:50,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:02:50,161 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-05 23:02:50,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:02:50,162 INFO L82 PathProgramCache]: Analyzing trace with hash 1602760798, now seen corresponding path program 24 times [2020-10-05 23:02:50,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:02:50,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052167394] [2020-10-05 23:02:50,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:02:50,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:02:50,281 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-05 23:02:50,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052167394] [2020-10-05 23:02:50,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179076592] [2020-10-05 23:02:50,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-05 23:02:50,319 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 23:02:50,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:02:50,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:02:50,320 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:02:50,346 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 34 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-05 23:02:50,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:02:50,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-05 23:02:50,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811998101] [2020-10-05 23:02:50,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:02:50,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:02:50,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:02:50,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:02:50,348 INFO L87 Difference]: Start difference. First operand 453 states and 1022 transitions. Second operand 17 states. [2020-10-05 23:02:50,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:02:50,708 INFO L93 Difference]: Finished difference Result 1084 states and 2413 transitions. [2020-10-05 23:02:50,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:02:50,709 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-05 23:02:50,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:02:50,709 INFO L225 Difference]: With dead ends: 1084 [2020-10-05 23:02:50,709 INFO L226 Difference]: Without dead ends: 0 [2020-10-05 23:02:50,710 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=322, Invalid=868, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 23:02:50,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-05 23:02:50,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-05 23:02:50,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-05 23:02:50,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-05 23:02:50,711 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-10-05 23:02:50,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:02:50,711 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-05 23:02:50,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:02:50,711 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-05 23:02:50,712 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-05 23:02:50,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-05 23:02:50,918 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 11:02:50 BasicIcfg [2020-10-05 23:02:50,918 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-05 23:02:50,923 INFO L168 Benchmark]: Toolchain (without parser) took 24599.94 ms. Allocated memory was 147.8 MB in the beginning and 393.7 MB in the end (delta: 245.9 MB). Free memory was 101.9 MB in the beginning and 105.2 MB in the end (delta: -3.3 MB). Peak memory consumption was 242.6 MB. Max. memory is 7.1 GB. [2020-10-05 23:02:50,924 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-10-05 23:02:50,925 INFO L168 Benchmark]: CACSL2BoogieTranslator took 341.23 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 101.7 MB in the beginning and 181.6 MB in the end (delta: -80.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. [2020-10-05 23:02:50,925 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.55 ms. Allocated memory is still 204.5 MB. Free memory was 181.6 MB in the beginning and 179.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-05 23:02:50,926 INFO L168 Benchmark]: Boogie Preprocessor took 20.71 ms. Allocated memory is still 204.5 MB. Free memory was 179.7 MB in the beginning and 178.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-05 23:02:50,926 INFO L168 Benchmark]: RCFGBuilder took 314.11 ms. Allocated memory is still 204.5 MB. Free memory was 178.4 MB in the beginning and 161.8 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. [2020-10-05 23:02:50,927 INFO L168 Benchmark]: TraceAbstraction took 23889.76 ms. Allocated memory was 204.5 MB in the beginning and 393.7 MB in the end (delta: 189.3 MB). Free memory was 161.1 MB in the beginning and 105.2 MB in the end (delta: 55.9 MB). Peak memory consumption was 245.2 MB. Max. memory is 7.1 GB. [2020-10-05 23:02:50,932 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 147.8 MB. Free memory was 122.6 MB in the beginning and 122.3 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 341.23 ms. Allocated memory was 147.8 MB in the beginning and 204.5 MB in the end (delta: 56.6 MB). Free memory was 101.7 MB in the beginning and 181.6 MB in the end (delta: -80.0 MB). Peak memory consumption was 17.8 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 28.55 ms. Allocated memory is still 204.5 MB. Free memory was 181.6 MB in the beginning and 179.7 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 20.71 ms. Allocated memory is still 204.5 MB. Free memory was 179.7 MB in the beginning and 178.4 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 314.11 ms. Allocated memory is still 204.5 MB. Free memory was 178.4 MB in the beginning and 161.8 MB in the end (delta: 16.7 MB). Peak memory consumption was 16.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 23889.76 ms. Allocated memory was 204.5 MB in the beginning and 393.7 MB in the end (delta: 189.3 MB). Free memory was 161.1 MB in the beginning and 105.2 MB in the end (delta: 55.9 MB). Peak memory consumption was 245.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 0.8s, 57 ProgramPointsBefore, 27 ProgramPointsAfterwards, 56 TransitionsBefore, 24 TransitionsAfterwards, 528 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 12 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 2 ChoiceCompositions, 235 VarBasedMoverChecksPositive, 7 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 426 CheckedPairsTotal, 32 TotalNumberOfCompositions - PositiveResult [Line: 46]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 23.7s, OverallIterations: 26, TraceHistogramMax: 5, AutomataDifference: 10.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.9s, HoareTripleCheckerStatistics: 1926 SDtfs, 9011 SDslu, 9317 SDs, 0 SdLazy, 5664 SolverSat, 1140 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.6s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1525 GetRequests, 751 SyntacticMatches, 0 SemanticMatches, 774 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6305 ImplicationChecksByTransitivity, 8.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1276occurred in iteration=14, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 26 MinimizatonAttempts, 7142 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.3s InterpolantComputationTime, 1613 NumberOfCodeBlocks, 1613 NumberOfCodeBlocksAsserted, 128 NumberOfCheckSat, 1562 ConstructedInterpolants, 0 QuantifiedInterpolants, 141580 SizeOfPredicates, 284 NumberOfNonLiveVariables, 2584 ConjunctsInSsa, 345 ConjunctsInUnsatCore, 51 InterpolantComputations, 3 PerfectInterpolantSequences, 1427/1996 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...