/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-b09bf87 [2020-10-16 11:31:57,016 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-16 11:31:57,019 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-16 11:31:57,045 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-16 11:31:57,045 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-16 11:31:57,046 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-16 11:31:57,048 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-16 11:31:57,050 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-16 11:31:57,051 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-16 11:31:57,052 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-16 11:31:57,053 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-16 11:31:57,055 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-16 11:31:57,055 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-16 11:31:57,056 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-16 11:31:57,057 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-16 11:31:57,058 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-16 11:31:57,059 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-16 11:31:57,060 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-16 11:31:57,062 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-16 11:31:57,065 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-16 11:31:57,066 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-16 11:31:57,068 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-16 11:31:57,069 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-16 11:31:57,070 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-16 11:31:57,072 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-16 11:31:57,076 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-16 11:31:57,077 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-16 11:31:57,077 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-16 11:31:57,078 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-16 11:31:57,079 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-16 11:31:57,080 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-16 11:31:57,080 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-16 11:31:57,080 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-16 11:31:57,081 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-16 11:31:57,081 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-16 11:31:57,082 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-16 11:31:57,083 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-16 11:31:57,107 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-16 11:31:57,107 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-16 11:31:57,108 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-16 11:31:57,109 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-16 11:31:57,109 INFO L138 SettingsManager]: * Use SBE=true [2020-10-16 11:31:57,109 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-16 11:31:57,109 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-16 11:31:57,110 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-16 11:31:57,110 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-16 11:31:57,110 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-16 11:31:57,110 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-16 11:31:57,110 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-16 11:31:57,111 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-16 11:31:57,111 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-16 11:31:57,111 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-16 11:31:57,111 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-16 11:31:57,111 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-16 11:31:57,112 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-16 11:31:57,112 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-16 11:31:57,112 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-16 11:31:57,112 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-16 11:31:57,112 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-16 11:31:57,113 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-16 11:31:57,113 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-16 11:31:57,113 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-16 11:31:57,113 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-16 11:31:57,113 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-16 11:31:57,113 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-16 11:31:57,114 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-16 11:31:57,114 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-16 11:31:57,433 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-16 11:31:57,454 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-16 11:31:57,458 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-16 11:31:57,460 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-16 11:31:57,460 INFO L275 PluginConnector]: CDTParser initialized [2020-10-16 11:31:57,461 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-16 11:31:57,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fbb2e229/45779fbf0c8b42919c94de95617f99a2/FLAGa561ef7ad [2020-10-16 11:31:58,016 INFO L306 CDTParser]: Found 1 translation units. [2020-10-16 11:31:58,017 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-10-16 11:31:58,017 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-16 11:31:58,017 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-16 11:31:58,017 WARN L117 ultiparseSymbolTable]: System include stdbool.h could not be resolved by CDT -- only built-in system includes are available. [2020-10-16 11:31:58,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fbb2e229/45779fbf0c8b42919c94de95617f99a2/FLAGa561ef7ad [2020-10-16 11:31:58,374 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fbb2e229/45779fbf0c8b42919c94de95617f99a2 [2020-10-16 11:31:58,382 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-16 11:31:58,384 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-16 11:31:58,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-16 11:31:58,385 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-16 11:31:58,389 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-16 11:31:58,389 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:31:58" (1/1) ... [2020-10-16 11:31:58,392 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5940ded0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:31:58, skipping insertion in model container [2020-10-16 11:31:58,393 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.10 11:31:58" (1/1) ... [2020-10-16 11:31:58,400 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-16 11:31:58,423 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-16 11:31:58,710 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:31:58,727 INFO L203 MainTranslator]: Completed pre-run [2020-10-16 11:31:58,749 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-16 11:31:58,888 INFO L208 MainTranslator]: Completed translation [2020-10-16 11:31:58,888 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:31:58 WrapperNode [2020-10-16 11:31:58,888 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-16 11:31:58,889 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-16 11:31:58,890 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-16 11:31:58,891 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-16 11:31:58,902 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:31:58" (1/1) ... [2020-10-16 11:31:58,913 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:31:58" (1/1) ... [2020-10-16 11:31:58,934 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-16 11:31:58,935 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-16 11:31:58,935 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-16 11:31:58,935 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-16 11:31:58,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:31:58" (1/1) ... [2020-10-16 11:31:58,945 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:31:58" (1/1) ... [2020-10-16 11:31:58,946 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:31:58" (1/1) ... [2020-10-16 11:31:58,947 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:31:58" (1/1) ... [2020-10-16 11:31:58,951 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:31:58" (1/1) ... [2020-10-16 11:31:58,957 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:31:58" (1/1) ... [2020-10-16 11:31:58,958 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:31:58" (1/1) ... [2020-10-16 11:31:58,960 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-16 11:31:58,961 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-16 11:31:58,961 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-16 11:31:58,961 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-16 11:31:58,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:31:58" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:31:59,031 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-16 11:31:59,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-16 11:31:59,032 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-16 11:31:59,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-16 11:31:59,034 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrement [2020-10-16 11:31:59,034 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrement [2020-10-16 11:31:59,035 INFO L130 BoogieDeclarations]: Found specification of procedure firstIncrement [2020-10-16 11:31:59,035 INFO L138 BoogieDeclarations]: Found implementation of procedure firstIncrement [2020-10-16 11:31:59,035 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-16 11:31:59,035 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-16 11:31:59,037 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-16 11:31:59,400 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-16 11:31:59,401 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-16 11:31:59,403 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:31:59 BoogieIcfgContainer [2020-10-16 11:31:59,404 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-16 11:31:59,405 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-16 11:31:59,406 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-16 11:31:59,410 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-16 11:31:59,410 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.10 11:31:58" (1/3) ... [2020-10-16 11:31:59,411 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a06c21a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:31:59, skipping insertion in model container [2020-10-16 11:31:59,411 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.10 11:31:58" (2/3) ... [2020-10-16 11:31:59,412 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a06c21a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.10 11:31:59, skipping insertion in model container [2020-10-16 11:31:59,412 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.10 11:31:59" (3/3) ... [2020-10-16 11:31:59,414 INFO L111 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.c [2020-10-16 11:31:59,428 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-16 11:31:59,429 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-16 11:31:59,438 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-16 11:31:59,439 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-16 11:31:59,469 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,469 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,470 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,470 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,470 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,471 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,471 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,471 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,472 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,472 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,472 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,473 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,473 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,473 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,474 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,474 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,474 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,475 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,475 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,475 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,475 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,476 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,479 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,481 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,481 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,481 WARN L313 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,481 WARN L313 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,487 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,487 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,487 WARN L313 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,488 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,488 WARN L313 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-16 11:31:59,499 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2020-10-16 11:31:59,515 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-16 11:31:59,540 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-16 11:31:59,540 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-16 11:31:59,540 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-16 11:31:59,540 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-16 11:31:59,541 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-16 11:31:59,541 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-16 11:31:59,541 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-16 11:31:59,541 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-16 11:31:59,557 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-16 11:31:59,560 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 56 transitions, 134 flow [2020-10-16 11:31:59,563 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 57 places, 56 transitions, 134 flow [2020-10-16 11:31:59,566 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 56 transitions, 134 flow [2020-10-16 11:31:59,611 INFO L129 PetriNetUnfolder]: 5/56 cut-off events. [2020-10-16 11:31:59,612 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2020-10-16 11:31:59,618 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. [2020-10-16 11:31:59,620 INFO L117 LiptonReduction]: Number of co-enabled transitions 528 [2020-10-16 11:32:00,445 INFO L132 LiptonReduction]: Checked pairs total: 866 [2020-10-16 11:32:00,446 INFO L134 LiptonReduction]: Total number of compositions: 34 [2020-10-16 11:32:00,453 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 24 transitions, 70 flow [2020-10-16 11:32:00,467 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 70 states. [2020-10-16 11:32:00,469 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states. [2020-10-16 11:32:00,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-16 11:32:00,478 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:00,479 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:00,480 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:00,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:00,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1474833226, now seen corresponding path program 1 times [2020-10-16 11:32:00,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:00,497 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503617024] [2020-10-16 11:32:00,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:00,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:00,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503617024] [2020-10-16 11:32:00,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-16 11:32:00,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-16 11:32:00,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85295026] [2020-10-16 11:32:00,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 11:32:00,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:00,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 11:32:00,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-16 11:32:00,685 INFO L87 Difference]: Start difference. First operand 70 states. Second operand 3 states. [2020-10-16 11:32:00,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:00,726 INFO L93 Difference]: Finished difference Result 96 states and 211 transitions. [2020-10-16 11:32:00,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 11:32:00,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 15 [2020-10-16 11:32:00,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:00,751 INFO L225 Difference]: With dead ends: 96 [2020-10-16 11:32:00,752 INFO L226 Difference]: Without dead ends: 95 [2020-10-16 11:32:00,754 INFO L677 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 [2020-10-16 11:32:00,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-16 11:32:00,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 82. [2020-10-16 11:32:00,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-16 11:32:00,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 180 transitions. [2020-10-16 11:32:00,824 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 180 transitions. Word has length 15 [2020-10-16 11:32:00,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:00,825 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 180 transitions. [2020-10-16 11:32:00,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 11:32:00,825 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 180 transitions. [2020-10-16 11:32:00,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-16 11:32:00,831 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:00,831 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:00,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-16 11:32:00,832 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:00,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:00,832 INFO L82 PathProgramCache]: Analyzing trace with hash -657301668, now seen corresponding path program 1 times [2020-10-16 11:32:00,833 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:00,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730048945] [2020-10-16 11:32:00,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:00,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:00,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730048945] [2020-10-16 11:32:00,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999276798] [2020-10-16 11:32:00,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:01,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:01,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 2 conjunts are in the unsatisfiable core [2020-10-16 11:32:01,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:32:01,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 11:32:01,071 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2020-10-16 11:32:01,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616617022] [2020-10-16 11:32:01,072 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-16 11:32:01,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:01,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-16 11:32:01,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-16 11:32:01,074 INFO L87 Difference]: Start difference. First operand 82 states and 180 transitions. Second operand 3 states. [2020-10-16 11:32:01,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:01,091 INFO L93 Difference]: Finished difference Result 108 states and 242 transitions. [2020-10-16 11:32:01,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-16 11:32:01,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-16 11:32:01,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:01,094 INFO L225 Difference]: With dead ends: 108 [2020-10-16 11:32:01,094 INFO L226 Difference]: Without dead ends: 108 [2020-10-16 11:32:01,095 INFO L677 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 [2020-10-16 11:32:01,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-16 11:32:01,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 95. [2020-10-16 11:32:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-16 11:32:01,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 211 transitions. [2020-10-16 11:32:01,106 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 211 transitions. Word has length 17 [2020-10-16 11:32:01,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:01,107 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 211 transitions. [2020-10-16 11:32:01,107 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-16 11:32:01,107 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 211 transitions. [2020-10-16 11:32:01,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-16 11:32:01,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:01,109 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:01,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2020-10-16 11:32:01,323 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:01,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:01,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1653958726, now seen corresponding path program 1 times [2020-10-16 11:32:01,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:01,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523959221] [2020-10-16 11:32:01,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:01,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523959221] [2020-10-16 11:32:01,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296252474] [2020-10-16 11:32:01,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:01,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:01,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 3 conjunts are in the unsatisfiable core [2020-10-16 11:32:01,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:32:01,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:01,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2020-10-16 11:32:01,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079429767] [2020-10-16 11:32:01,457 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:32:01,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:01,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:32:01,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:32:01,458 INFO L87 Difference]: Start difference. First operand 95 states and 211 transitions. Second operand 6 states. [2020-10-16 11:32:01,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:01,557 INFO L93 Difference]: Finished difference Result 197 states and 454 transitions. [2020-10-16 11:32:01,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-16 11:32:01,558 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2020-10-16 11:32:01,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:01,560 INFO L225 Difference]: With dead ends: 197 [2020-10-16 11:32:01,560 INFO L226 Difference]: Without dead ends: 197 [2020-10-16 11:32:01,561 INFO L677 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 [2020-10-16 11:32:01,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-16 11:32:01,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 159. [2020-10-16 11:32:01,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-16 11:32:01,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 363 transitions. [2020-10-16 11:32:01,577 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 363 transitions. Word has length 19 [2020-10-16 11:32:01,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:01,577 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 363 transitions. [2020-10-16 11:32:01,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:32:01,578 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 363 transitions. [2020-10-16 11:32:01,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-16 11:32:01,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:01,580 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:01,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:01,789 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:01,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:01,790 INFO L82 PathProgramCache]: Analyzing trace with hash 2009767926, now seen corresponding path program 2 times [2020-10-16 11:32:01,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:01,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149771086] [2020-10-16 11:32:01,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:01,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:01,892 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 11:32:01,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149771086] [2020-10-16 11:32:01,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765880939] [2020-10-16 11:32:01,893 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:01,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:32:01,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:01,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 11:32:01,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:01,967 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 11:32:01,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:01,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:32:01,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063373337] [2020-10-16 11:32:01,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:32:01,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:01,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:32:01,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:32:01,969 INFO L87 Difference]: Start difference. First operand 159 states and 363 transitions. Second operand 6 states. [2020-10-16 11:32:01,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:01,995 INFO L93 Difference]: Finished difference Result 210 states and 486 transitions. [2020-10-16 11:32:01,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:32:01,995 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 23 [2020-10-16 11:32:01,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:01,998 INFO L225 Difference]: With dead ends: 210 [2020-10-16 11:32:01,998 INFO L226 Difference]: Without dead ends: 210 [2020-10-16 11:32:01,999 INFO L677 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 [2020-10-16 11:32:02,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-16 11:32:02,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 193. [2020-10-16 11:32:02,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-16 11:32:02,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 445 transitions. [2020-10-16 11:32:02,017 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 445 transitions. Word has length 23 [2020-10-16 11:32:02,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:02,018 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 445 transitions. [2020-10-16 11:32:02,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:32:02,018 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 445 transitions. [2020-10-16 11:32:02,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-16 11:32:02,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:02,024 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:02,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:02,239 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:02,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:02,240 INFO L82 PathProgramCache]: Analyzing trace with hash -275132064, now seen corresponding path program 3 times [2020-10-16 11:32:02,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:02,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906065587] [2020-10-16 11:32:02,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:02,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:02,300 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 11:32:02,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906065587] [2020-10-16 11:32:02,301 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [356391838] [2020-10-16 11:32:02,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:02,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-16 11:32:02,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:02,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 11:32:02,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:02,389 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 11:32:02,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:02,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:32:02,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40936041] [2020-10-16 11:32:02,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 11:32:02,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:02,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 11:32:02,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:32:02,392 INFO L87 Difference]: Start difference. First operand 193 states and 445 transitions. Second operand 7 states. [2020-10-16 11:32:02,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:02,421 INFO L93 Difference]: Finished difference Result 244 states and 568 transitions. [2020-10-16 11:32:02,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:32:02,421 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-16 11:32:02,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:02,423 INFO L225 Difference]: With dead ends: 244 [2020-10-16 11:32:02,424 INFO L226 Difference]: Without dead ends: 244 [2020-10-16 11:32:02,424 INFO L677 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 [2020-10-16 11:32:02,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-16 11:32:02,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 227. [2020-10-16 11:32:02,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-16 11:32:02,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 527 transitions. [2020-10-16 11:32:02,438 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 527 transitions. Word has length 25 [2020-10-16 11:32:02,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:02,439 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 527 transitions. [2020-10-16 11:32:02,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 11:32:02,439 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 527 transitions. [2020-10-16 11:32:02,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-16 11:32:02,441 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:02,441 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:02,655 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:02,656 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:02,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:02,656 INFO L82 PathProgramCache]: Analyzing trace with hash -1335734198, now seen corresponding path program 4 times [2020-10-16 11:32:02,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:02,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038513266] [2020-10-16 11:32:02,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:02,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 11:32:02,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038513266] [2020-10-16 11:32:02,771 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366371747] [2020-10-16 11:32:02,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:02,814 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:32:02,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:02,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 11:32:02,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:02,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 11:32:02,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:02,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:32:02,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481952629] [2020-10-16 11:32:02,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:32:02,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:02,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:32:02,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:32:02,851 INFO L87 Difference]: Start difference. First operand 227 states and 527 transitions. Second operand 8 states. [2020-10-16 11:32:02,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:02,884 INFO L93 Difference]: Finished difference Result 261 states and 609 transitions. [2020-10-16 11:32:02,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:32:02,884 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 27 [2020-10-16 11:32:02,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:02,887 INFO L225 Difference]: With dead ends: 261 [2020-10-16 11:32:02,887 INFO L226 Difference]: Without dead ends: 261 [2020-10-16 11:32:02,887 INFO L677 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 [2020-10-16 11:32:02,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-10-16 11:32:02,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2020-10-16 11:32:02,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-16 11:32:02,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 609 transitions. [2020-10-16 11:32:02,901 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 609 transitions. Word has length 27 [2020-10-16 11:32:02,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:02,901 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 609 transitions. [2020-10-16 11:32:02,901 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:32:02,902 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 609 transitions. [2020-10-16 11:32:02,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-16 11:32:02,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:02,903 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:03,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-16 11:32:03,119 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:03,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:03,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1627831476, now seen corresponding path program 5 times [2020-10-16 11:32:03,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:03,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093199160] [2020-10-16 11:32:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:03,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:03,169 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 11:32:03,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093199160] [2020-10-16 11:32:03,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056159124] [2020-10-16 11:32:03,170 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:03,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-16 11:32:03,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:03,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 4 conjunts are in the unsatisfiable core [2020-10-16 11:32:03,256 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:03,299 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 11:32:03,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:03,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-16 11:32:03,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990020606] [2020-10-16 11:32:03,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-16 11:32:03,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:03,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-16 11:32:03,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2020-10-16 11:32:03,302 INFO L87 Difference]: Start difference. First operand 261 states and 609 transitions. Second operand 6 states. [2020-10-16 11:32:03,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:03,331 INFO L93 Difference]: Finished difference Result 354 states and 834 transitions. [2020-10-16 11:32:03,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-16 11:32:03,332 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-16 11:32:03,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:03,335 INFO L225 Difference]: With dead ends: 354 [2020-10-16 11:32:03,335 INFO L226 Difference]: Without dead ends: 354 [2020-10-16 11:32:03,336 INFO L677 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 [2020-10-16 11:32:03,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2020-10-16 11:32:03,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 323. [2020-10-16 11:32:03,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 323 states. [2020-10-16 11:32:03,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 759 transitions. [2020-10-16 11:32:03,348 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 759 transitions. Word has length 29 [2020-10-16 11:32:03,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:03,349 INFO L481 AbstractCegarLoop]: Abstraction has 323 states and 759 transitions. [2020-10-16 11:32:03,349 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-16 11:32:03,349 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 759 transitions. [2020-10-16 11:32:03,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-16 11:32:03,350 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:03,351 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:03,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:03,561 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:03,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:03,562 INFO L82 PathProgramCache]: Analyzing trace with hash 827854074, now seen corresponding path program 6 times [2020-10-16 11:32:03,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:03,563 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914826418] [2020-10-16 11:32:03,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:03,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:03,665 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 11:32:03,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914826418] [2020-10-16 11:32:03,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786396700] [2020-10-16 11:32:03,666 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:03,716 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-16 11:32:03,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:03,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 5 conjunts are in the unsatisfiable core [2020-10-16 11:32:03,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:03,753 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 5 proven. 9 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 11:32:03,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:03,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-16 11:32:03,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379857701] [2020-10-16 11:32:03,754 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-16 11:32:03,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:03,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-16 11:32:03,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2020-10-16 11:32:03,755 INFO L87 Difference]: Start difference. First operand 323 states and 759 transitions. Second operand 7 states. [2020-10-16 11:32:03,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:03,783 INFO L93 Difference]: Finished difference Result 416 states and 984 transitions. [2020-10-16 11:32:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-16 11:32:03,783 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 31 [2020-10-16 11:32:03,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:03,786 INFO L225 Difference]: With dead ends: 416 [2020-10-16 11:32:03,786 INFO L226 Difference]: Without dead ends: 416 [2020-10-16 11:32:03,787 INFO L677 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 [2020-10-16 11:32:03,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2020-10-16 11:32:03,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 385. [2020-10-16 11:32:03,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 385 states. [2020-10-16 11:32:03,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 909 transitions. [2020-10-16 11:32:03,799 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 909 transitions. Word has length 31 [2020-10-16 11:32:03,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:03,799 INFO L481 AbstractCegarLoop]: Abstraction has 385 states and 909 transitions. [2020-10-16 11:32:03,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-16 11:32:03,800 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 909 transitions. [2020-10-16 11:32:03,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-16 11:32:03,801 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:03,801 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:04,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:04,015 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:04,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:04,015 INFO L82 PathProgramCache]: Analyzing trace with hash 848716736, now seen corresponding path program 7 times [2020-10-16 11:32:04,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:04,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168616263] [2020-10-16 11:32:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 11:32:04,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168616263] [2020-10-16 11:32:04,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618468131] [2020-10-16 11:32:04,070 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:04,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 6 conjunts are in the unsatisfiable core [2020-10-16 11:32:04,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:04,182 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 5 proven. 16 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2020-10-16 11:32:04,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:04,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-16 11:32:04,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599241266] [2020-10-16 11:32:04,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-16 11:32:04,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:04,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-16 11:32:04,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2020-10-16 11:32:04,185 INFO L87 Difference]: Start difference. First operand 385 states and 909 transitions. Second operand 8 states. [2020-10-16 11:32:04,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:04,217 INFO L93 Difference]: Finished difference Result 447 states and 1059 transitions. [2020-10-16 11:32:04,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-16 11:32:04,218 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-16 11:32:04,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:04,221 INFO L225 Difference]: With dead ends: 447 [2020-10-16 11:32:04,221 INFO L226 Difference]: Without dead ends: 447 [2020-10-16 11:32:04,221 INFO L677 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 [2020-10-16 11:32:04,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2020-10-16 11:32:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 447. [2020-10-16 11:32:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2020-10-16 11:32:04,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1059 transitions. [2020-10-16 11:32:04,234 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1059 transitions. Word has length 33 [2020-10-16 11:32:04,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:04,234 INFO L481 AbstractCegarLoop]: Abstraction has 447 states and 1059 transitions. [2020-10-16 11:32:04,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-16 11:32:04,235 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1059 transitions. [2020-10-16 11:32:04,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:04,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:04,236 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:04,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-10-16 11:32:04,452 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:04,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:04,453 INFO L82 PathProgramCache]: Analyzing trace with hash -577101562, now seen corresponding path program 8 times [2020-10-16 11:32:04,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:04,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408934502] [2020-10-16 11:32:04,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:04,769 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 41 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:04,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408934502] [2020-10-16 11:32:04,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104916489] [2020-10-16 11:32:04,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:04,820 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:32:04,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:04,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-16 11:32:04,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:04,873 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 50 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:04,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-10-16 11:32:04,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [21] total 23 [2020-10-16 11:32:04,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729645665] [2020-10-16 11:32:04,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:32:04,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:04,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:32:04,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=476, Unknown=0, NotChecked=0, Total=600 [2020-10-16 11:32:04,876 INFO L87 Difference]: Start difference. First operand 447 states and 1059 transitions. Second operand 23 states. [2020-10-16 11:32:05,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:05,655 INFO L93 Difference]: Finished difference Result 1728 states and 4029 transitions. [2020-10-16 11:32:05,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:32:05,655 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 11:32:05,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:05,664 INFO L225 Difference]: With dead ends: 1728 [2020-10-16 11:32:05,664 INFO L226 Difference]: Without dead ends: 876 [2020-10-16 11:32:05,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=720, Invalid=1632, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:32:05,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 876 states. [2020-10-16 11:32:05,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 876 to 585. [2020-10-16 11:32:05,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-10-16 11:32:05,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 1403 transitions. [2020-10-16 11:32:05,687 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 1403 transitions. Word has length 35 [2020-10-16 11:32:05,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:05,689 INFO L481 AbstractCegarLoop]: Abstraction has 585 states and 1403 transitions. [2020-10-16 11:32:05,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:32:05,689 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 1403 transitions. [2020-10-16 11:32:05,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:05,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:05,691 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:05,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:05,905 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:05,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:05,906 INFO L82 PathProgramCache]: Analyzing trace with hash 915971432, now seen corresponding path program 9 times [2020-10-16 11:32:05,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:05,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080589248] [2020-10-16 11:32:05,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:06,160 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:06,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080589248] [2020-10-16 11:32:06,161 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919578027] [2020-10-16 11:32:06,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:06,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:32:06,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:06,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:32:06,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:06,276 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:06,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:06,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 11:32:06,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166919699] [2020-10-16 11:32:06,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:32:06,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:06,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:32:06,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:32:06,279 INFO L87 Difference]: Start difference. First operand 585 states and 1403 transitions. Second operand 23 states. [2020-10-16 11:32:06,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:06,921 INFO L93 Difference]: Finished difference Result 1731 states and 4053 transitions. [2020-10-16 11:32:06,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:32:06,921 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 11:32:06,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:06,925 INFO L225 Difference]: With dead ends: 1731 [2020-10-16 11:32:06,925 INFO L226 Difference]: Without dead ends: 816 [2020-10-16 11:32:06,926 INFO L677 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 [2020-10-16 11:32:06,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2020-10-16 11:32:06,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 569. [2020-10-16 11:32:06,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 569 states. [2020-10-16 11:32:06,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 1355 transitions. [2020-10-16 11:32:06,944 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 1355 transitions. Word has length 35 [2020-10-16 11:32:06,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:06,944 INFO L481 AbstractCegarLoop]: Abstraction has 569 states and 1355 transitions. [2020-10-16 11:32:06,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:32:06,944 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 1355 transitions. [2020-10-16 11:32:06,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:06,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:06,946 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:07,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:07,161 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:07,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:07,162 INFO L82 PathProgramCache]: Analyzing trace with hash -570341976, now seen corresponding path program 10 times [2020-10-16 11:32:07,162 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:07,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538304191] [2020-10-16 11:32:07,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:07,374 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:07,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538304191] [2020-10-16 11:32:07,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228795319] [2020-10-16 11:32:07,375 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:07,415 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:32:07,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:07,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:32:07,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:07,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:07,462 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 11:32:07,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347424377] [2020-10-16 11:32:07,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:32:07,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:07,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:32:07,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:32:07,463 INFO L87 Difference]: Start difference. First operand 569 states and 1355 transitions. Second operand 23 states. [2020-10-16 11:32:08,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:08,110 INFO L93 Difference]: Finished difference Result 2131 states and 4974 transitions. [2020-10-16 11:32:08,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:32:08,111 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 11:32:08,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:08,115 INFO L225 Difference]: With dead ends: 2131 [2020-10-16 11:32:08,116 INFO L226 Difference]: Without dead ends: 792 [2020-10-16 11:32:08,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=558, Invalid=1422, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:32:08,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2020-10-16 11:32:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 553. [2020-10-16 11:32:08,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 553 states. [2020-10-16 11:32:08,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 1307 transitions. [2020-10-16 11:32:08,133 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 1307 transitions. Word has length 35 [2020-10-16 11:32:08,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:08,134 INFO L481 AbstractCegarLoop]: Abstraction has 553 states and 1307 transitions. [2020-10-16 11:32:08,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:32:08,134 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 1307 transitions. [2020-10-16 11:32:08,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:08,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:08,136 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:08,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2020-10-16 11:32:08,350 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:08,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:08,350 INFO L82 PathProgramCache]: Analyzing trace with hash 1306582504, now seen corresponding path program 11 times [2020-10-16 11:32:08,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:08,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854041169] [2020-10-16 11:32:08,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:08,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:08,569 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:08,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854041169] [2020-10-16 11:32:08,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593453320] [2020-10-16 11:32:08,570 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:08,620 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-10-16 11:32:08,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:08,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:32:08,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:08,668 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:08,669 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:08,669 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 11:32:08,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139922583] [2020-10-16 11:32:08,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:32:08,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:08,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:32:08,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:32:08,671 INFO L87 Difference]: Start difference. First operand 553 states and 1307 transitions. Second operand 23 states. [2020-10-16 11:32:09,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:09,276 INFO L93 Difference]: Finished difference Result 2670 states and 6229 transitions. [2020-10-16 11:32:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:32:09,276 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 11:32:09,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:09,282 INFO L225 Difference]: With dead ends: 2670 [2020-10-16 11:32:09,282 INFO L226 Difference]: Without dead ends: 768 [2020-10-16 11:32:09,283 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=588, Invalid=1482, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:32:09,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2020-10-16 11:32:09,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 537. [2020-10-16 11:32:09,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 537 states. [2020-10-16 11:32:09,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 1259 transitions. [2020-10-16 11:32:09,298 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 1259 transitions. Word has length 35 [2020-10-16 11:32:09,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:09,298 INFO L481 AbstractCegarLoop]: Abstraction has 537 states and 1259 transitions. [2020-10-16 11:32:09,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:32:09,299 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 1259 transitions. [2020-10-16 11:32:09,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:09,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:09,300 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:09,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-16 11:32:09,515 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:09,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:09,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1144743464, now seen corresponding path program 12 times [2020-10-16 11:32:09,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:09,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659465137] [2020-10-16 11:32:09,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:09,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659465137] [2020-10-16 11:32:09,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215989163] [2020-10-16 11:32:09,749 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:09,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-16 11:32:09,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:09,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:32:09,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:09,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:09,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 11:32:09,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638675554] [2020-10-16 11:32:09,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:32:09,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:09,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:32:09,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:32:09,853 INFO L87 Difference]: Start difference. First operand 537 states and 1259 transitions. Second operand 23 states. [2020-10-16 11:32:10,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:10,763 INFO L93 Difference]: Finished difference Result 3250 states and 7573 transitions. [2020-10-16 11:32:10,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-16 11:32:10,764 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 11:32:10,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:10,779 INFO L225 Difference]: With dead ends: 3250 [2020-10-16 11:32:10,779 INFO L226 Difference]: Without dead ends: 2437 [2020-10-16 11:32:10,781 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 723 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=897, Invalid=2409, Unknown=0, NotChecked=0, Total=3306 [2020-10-16 11:32:10,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2437 states. [2020-10-16 11:32:10,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2437 to 1276. [2020-10-16 11:32:10,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1276 states. [2020-10-16 11:32:10,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1276 states to 1276 states and 3101 transitions. [2020-10-16 11:32:10,825 INFO L78 Accepts]: Start accepts. Automaton has 1276 states and 3101 transitions. Word has length 35 [2020-10-16 11:32:10,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:10,826 INFO L481 AbstractCegarLoop]: Abstraction has 1276 states and 3101 transitions. [2020-10-16 11:32:10,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:32:10,826 INFO L276 IsEmpty]: Start isEmpty. Operand 1276 states and 3101 transitions. [2020-10-16 11:32:10,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:10,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:10,829 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:11,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-10-16 11:32:11,045 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:11,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:11,045 INFO L82 PathProgramCache]: Analyzing trace with hash 909108414, now seen corresponding path program 13 times [2020-10-16 11:32:11,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:11,045 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924579774] [2020-10-16 11:32:11,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:11,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 25 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:32:11,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924579774] [2020-10-16 11:32:11,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518389597] [2020-10-16 11:32:11,285 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:11,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:11,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:32:11,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 33 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:32:11,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:11,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-16 11:32:11,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458670599] [2020-10-16 11:32:11,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:32:11,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:32:11,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:32:11,399 INFO L87 Difference]: Start difference. First operand 1276 states and 3101 transitions. Second operand 21 states. [2020-10-16 11:32:12,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:12,192 INFO L93 Difference]: Finished difference Result 2721 states and 6420 transitions. [2020-10-16 11:32:12,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-16 11:32:12,193 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-16 11:32:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:12,205 INFO L225 Difference]: With dead ends: 2721 [2020-10-16 11:32:12,205 INFO L226 Difference]: Without dead ends: 2040 [2020-10-16 11:32:12,206 INFO L677 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 [2020-10-16 11:32:12,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2040 states. [2020-10-16 11:32:12,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2040 to 1192. [2020-10-16 11:32:12,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1192 states. [2020-10-16 11:32:12,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1192 states to 1192 states and 2873 transitions. [2020-10-16 11:32:12,244 INFO L78 Accepts]: Start accepts. Automaton has 1192 states and 2873 transitions. Word has length 35 [2020-10-16 11:32:12,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:12,244 INFO L481 AbstractCegarLoop]: Abstraction has 1192 states and 2873 transitions. [2020-10-16 11:32:12,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:32:12,245 INFO L276 IsEmpty]: Start isEmpty. Operand 1192 states and 2873 transitions. [2020-10-16 11:32:12,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:12,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:12,249 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:12,462 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:12,463 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:12,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:12,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1383117118, now seen corresponding path program 14 times [2020-10-16 11:32:12,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:12,464 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55947420] [2020-10-16 11:32:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:12,615 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 11:32:12,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55947420] [2020-10-16 11:32:12,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480479233] [2020-10-16 11:32:12,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:12,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:32:12,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:12,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:32:12,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:12,703 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 27 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 11:32:12,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:12,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-16 11:32:12,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991266862] [2020-10-16 11:32:12,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:32:12,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:12,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:32:12,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:32:12,706 INFO L87 Difference]: Start difference. First operand 1192 states and 2873 transitions. Second operand 19 states. [2020-10-16 11:32:13,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:13,346 INFO L93 Difference]: Finished difference Result 2550 states and 5976 transitions. [2020-10-16 11:32:13,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-16 11:32:13,347 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-16 11:32:13,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:13,356 INFO L225 Difference]: With dead ends: 2550 [2020-10-16 11:32:13,356 INFO L226 Difference]: Without dead ends: 1781 [2020-10-16 11:32:13,357 INFO L677 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 [2020-10-16 11:32:13,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1781 states. [2020-10-16 11:32:13,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1781 to 1058. [2020-10-16 11:32:13,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1058 states. [2020-10-16 11:32:13,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1058 states to 1058 states and 2526 transitions. [2020-10-16 11:32:13,384 INFO L78 Accepts]: Start accepts. Automaton has 1058 states and 2526 transitions. Word has length 35 [2020-10-16 11:32:13,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:13,384 INFO L481 AbstractCegarLoop]: Abstraction has 1058 states and 2526 transitions. [2020-10-16 11:32:13,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:32:13,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1058 states and 2526 transitions. [2020-10-16 11:32:13,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:13,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:13,387 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:13,600 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-16 11:32:13,601 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:13,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:13,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1638948286, now seen corresponding path program 15 times [2020-10-16 11:32:13,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:13,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049731467] [2020-10-16 11:32:13,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:13,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:13,723 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-16 11:32:13,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049731467] [2020-10-16 11:32:13,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76069992] [2020-10-16 11:32:13,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:13,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-16 11:32:13,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:13,766 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:32:13,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:13,815 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-16 11:32:13,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:13,818 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-16 11:32:13,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759389836] [2020-10-16 11:32:13,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:32:13,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:13,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:32:13,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:32:13,824 INFO L87 Difference]: Start difference. First operand 1058 states and 2526 transitions. Second operand 17 states. [2020-10-16 11:32:14,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:14,306 INFO L93 Difference]: Finished difference Result 2371 states and 5518 transitions. [2020-10-16 11:32:14,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-16 11:32:14,306 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-16 11:32:14,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:14,314 INFO L225 Difference]: With dead ends: 2371 [2020-10-16 11:32:14,315 INFO L226 Difference]: Without dead ends: 1444 [2020-10-16 11:32:14,316 INFO L677 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 [2020-10-16 11:32:14,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1444 states. [2020-10-16 11:32:14,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1444 to 874. [2020-10-16 11:32:14,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 874 states. [2020-10-16 11:32:14,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 874 states to 874 states and 2060 transitions. [2020-10-16 11:32:14,359 INFO L78 Accepts]: Start accepts. Automaton has 874 states and 2060 transitions. Word has length 35 [2020-10-16 11:32:14,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:14,360 INFO L481 AbstractCegarLoop]: Abstraction has 874 states and 2060 transitions. [2020-10-16 11:32:14,360 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:32:14,360 INFO L276 IsEmpty]: Start isEmpty. Operand 874 states and 2060 transitions. [2020-10-16 11:32:14,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:14,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:14,363 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:14,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-16 11:32:14,575 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:14,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:14,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1615402434, now seen corresponding path program 16 times [2020-10-16 11:32:14,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:14,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030031306] [2020-10-16 11:32:14,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:14,681 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 21 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-16 11:32:14,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030031306] [2020-10-16 11:32:14,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2054837789] [2020-10-16 11:32:14,683 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:14,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:32:14,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:14,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-16 11:32:14,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:14,785 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 21 proven. 13 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-16 11:32:14,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:14,786 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 13 [2020-10-16 11:32:14,786 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336315775] [2020-10-16 11:32:14,786 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-16 11:32:14,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:14,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-16 11:32:14,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-16 11:32:14,787 INFO L87 Difference]: Start difference. First operand 874 states and 2060 transitions. Second operand 15 states. [2020-10-16 11:32:15,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:15,124 INFO L93 Difference]: Finished difference Result 1669 states and 3808 transitions. [2020-10-16 11:32:15,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-16 11:32:15,124 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-10-16 11:32:15,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:15,129 INFO L225 Difference]: With dead ends: 1669 [2020-10-16 11:32:15,129 INFO L226 Difference]: Without dead ends: 744 [2020-10-16 11:32:15,129 INFO L677 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 [2020-10-16 11:32:15,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-16 11:32:15,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 521. [2020-10-16 11:32:15,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 521 states. [2020-10-16 11:32:15,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 521 states to 521 states and 1211 transitions. [2020-10-16 11:32:15,142 INFO L78 Accepts]: Start accepts. Automaton has 521 states and 1211 transitions. Word has length 35 [2020-10-16 11:32:15,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:15,142 INFO L481 AbstractCegarLoop]: Abstraction has 521 states and 1211 transitions. [2020-10-16 11:32:15,143 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-16 11:32:15,143 INFO L276 IsEmpty]: Start isEmpty. Operand 521 states and 1211 transitions. [2020-10-16 11:32:15,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:15,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:15,145 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:15,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-16 11:32:15,359 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:15,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:15,360 INFO L82 PathProgramCache]: Analyzing trace with hash 236248680, now seen corresponding path program 17 times [2020-10-16 11:32:15,360 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:15,360 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365728047] [2020-10-16 11:32:15,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:15,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:15,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365728047] [2020-10-16 11:32:15,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [871863903] [2020-10-16 11:32:15,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:15,612 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:32:15,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:15,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:32:15,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:15,677 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:15,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:15,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 11:32:15,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395468471] [2020-10-16 11:32:15,679 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:32:15,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:15,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:32:15,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:32:15,680 INFO L87 Difference]: Start difference. First operand 521 states and 1211 transitions. Second operand 23 states. [2020-10-16 11:32:16,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:16,251 INFO L93 Difference]: Finished difference Result 1734 states and 4025 transitions. [2020-10-16 11:32:16,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-16 11:32:16,251 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 11:32:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:16,255 INFO L225 Difference]: With dead ends: 1734 [2020-10-16 11:32:16,256 INFO L226 Difference]: Without dead ends: 894 [2020-10-16 11:32:16,256 INFO L677 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 [2020-10-16 11:32:16,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2020-10-16 11:32:16,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 582. [2020-10-16 11:32:16,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 582 states. [2020-10-16 11:32:16,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1364 transitions. [2020-10-16 11:32:16,267 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1364 transitions. Word has length 35 [2020-10-16 11:32:16,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:16,268 INFO L481 AbstractCegarLoop]: Abstraction has 582 states and 1364 transitions. [2020-10-16 11:32:16,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:32:16,268 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1364 transitions. [2020-10-16 11:32:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:16,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:16,270 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:16,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:16,483 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:16,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:16,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1268277900, now seen corresponding path program 18 times [2020-10-16 11:32:16,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:16,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539970235] [2020-10-16 11:32:16,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:16,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:16,718 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:16,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539970235] [2020-10-16 11:32:16,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [962174195] [2020-10-16 11:32:16,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:16,789 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-16 11:32:16,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:16,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:32:16,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:16,841 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:16,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:16,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 11:32:16,842 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978554199] [2020-10-16 11:32:16,842 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:32:16,843 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:16,843 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:32:16,843 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:32:16,844 INFO L87 Difference]: Start difference. First operand 582 states and 1364 transitions. Second operand 23 states. [2020-10-16 11:32:17,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:17,429 INFO L93 Difference]: Finished difference Result 1717 states and 3982 transitions. [2020-10-16 11:32:17,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:32:17,430 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 11:32:17,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:17,434 INFO L225 Difference]: With dead ends: 1717 [2020-10-16 11:32:17,434 INFO L226 Difference]: Without dead ends: 774 [2020-10-16 11:32:17,435 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=538, Invalid=1354, Unknown=0, NotChecked=0, Total=1892 [2020-10-16 11:32:17,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 774 states. [2020-10-16 11:32:17,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 774 to 538. [2020-10-16 11:32:17,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 538 states. [2020-10-16 11:32:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 538 states to 538 states and 1256 transitions. [2020-10-16 11:32:17,444 INFO L78 Accepts]: Start accepts. Automaton has 538 states and 1256 transitions. Word has length 35 [2020-10-16 11:32:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:17,444 INFO L481 AbstractCegarLoop]: Abstraction has 538 states and 1256 transitions. [2020-10-16 11:32:17,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:32:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 538 states and 1256 transitions. [2020-10-16 11:32:17,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:17,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:17,446 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:17,661 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:17,661 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:17,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:17,662 INFO L82 PathProgramCache]: Analyzing trace with hash -905226112, now seen corresponding path program 19 times [2020-10-16 11:32:17,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:17,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762913292] [2020-10-16 11:32:17,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:17,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:17,909 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:17,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762913292] [2020-10-16 11:32:17,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903899203] [2020-10-16 11:32:17,910 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:17,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:17,956 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:32:17,957 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:17,993 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:17,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:17,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 11:32:17,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127162342] [2020-10-16 11:32:17,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:32:17,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:17,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:32:17,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:32:17,996 INFO L87 Difference]: Start difference. First operand 538 states and 1256 transitions. Second operand 23 states. [2020-10-16 11:32:18,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:18,620 INFO L93 Difference]: Finished difference Result 2063 states and 4783 transitions. [2020-10-16 11:32:18,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:32:18,621 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 11:32:18,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:18,625 INFO L225 Difference]: With dead ends: 2063 [2020-10-16 11:32:18,625 INFO L226 Difference]: Without dead ends: 716 [2020-10-16 11:32:18,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=569, Invalid=1411, Unknown=0, NotChecked=0, Total=1980 [2020-10-16 11:32:18,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 716 states. [2020-10-16 11:32:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 716 to 494. [2020-10-16 11:32:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 494 states. [2020-10-16 11:32:18,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1148 transitions. [2020-10-16 11:32:18,635 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1148 transitions. Word has length 35 [2020-10-16 11:32:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:18,635 INFO L481 AbstractCegarLoop]: Abstraction has 494 states and 1148 transitions. [2020-10-16 11:32:18,635 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:32:18,635 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1148 transitions. [2020-10-16 11:32:18,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:18,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:18,637 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:18,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-16 11:32:18,848 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:18,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:18,849 INFO L82 PathProgramCache]: Analyzing trace with hash 95191180, now seen corresponding path program 20 times [2020-10-16 11:32:18,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:18,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540101132] [2020-10-16 11:32:18,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:18,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:19,045 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:19,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540101132] [2020-10-16 11:32:19,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297043103] [2020-10-16 11:32:19,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:19,080 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-16 11:32:19,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:19,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:32:19,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:19,132 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:19,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:19,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 11:32:19,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987307335] [2020-10-16 11:32:19,133 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:32:19,133 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:19,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:32:19,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:32:19,134 INFO L87 Difference]: Start difference. First operand 494 states and 1148 transitions. Second operand 23 states. [2020-10-16 11:32:19,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:19,789 INFO L93 Difference]: Finished difference Result 2541 states and 5902 transitions. [2020-10-16 11:32:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-16 11:32:19,789 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 11:32:19,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:19,793 INFO L225 Difference]: With dead ends: 2541 [2020-10-16 11:32:19,793 INFO L226 Difference]: Without dead ends: 658 [2020-10-16 11:32:19,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-16 11:32:19,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 658 states. [2020-10-16 11:32:19,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 658 to 450. [2020-10-16 11:32:19,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 450 states. [2020-10-16 11:32:19,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 1040 transitions. [2020-10-16 11:32:19,804 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 1040 transitions. Word has length 35 [2020-10-16 11:32:19,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:19,804 INFO L481 AbstractCegarLoop]: Abstraction has 450 states and 1040 transitions. [2020-10-16 11:32:19,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:32:19,805 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 1040 transitions. [2020-10-16 11:32:19,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:19,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:19,806 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:20,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-16 11:32:20,022 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:20,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:20,022 INFO L82 PathProgramCache]: Analyzing trace with hash -576465512, now seen corresponding path program 21 times [2020-10-16 11:32:20,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:20,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422319136] [2020-10-16 11:32:20,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:20,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:20,275 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 32 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:20,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422319136] [2020-10-16 11:32:20,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195465346] [2020-10-16 11:32:20,276 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:20,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-16 11:32:20,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:20,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-16 11:32:20,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:20,393 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 46 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:20,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:20,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-10-16 11:32:20,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459428674] [2020-10-16 11:32:20,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-16 11:32:20,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:20,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-16 11:32:20,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-10-16 11:32:20,396 INFO L87 Difference]: Start difference. First operand 450 states and 1040 transitions. Second operand 23 states. [2020-10-16 11:32:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:21,130 INFO L93 Difference]: Finished difference Result 2473 states and 5749 transitions. [2020-10-16 11:32:21,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-16 11:32:21,131 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 35 [2020-10-16 11:32:21,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:21,140 INFO L225 Difference]: With dead ends: 2473 [2020-10-16 11:32:21,140 INFO L226 Difference]: Without dead ends: 1507 [2020-10-16 11:32:21,141 INFO L677 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 [2020-10-16 11:32:21,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1507 states. [2020-10-16 11:32:21,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1507 to 771. [2020-10-16 11:32:21,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 771 states. [2020-10-16 11:32:21,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 771 states to 771 states and 1835 transitions. [2020-10-16 11:32:21,186 INFO L78 Accepts]: Start accepts. Automaton has 771 states and 1835 transitions. Word has length 35 [2020-10-16 11:32:21,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:21,186 INFO L481 AbstractCegarLoop]: Abstraction has 771 states and 1835 transitions. [2020-10-16 11:32:21,186 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-16 11:32:21,186 INFO L276 IsEmpty]: Start isEmpty. Operand 771 states and 1835 transitions. [2020-10-16 11:32:21,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:21,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:21,189 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:21,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:21,402 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:21,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:21,403 INFO L82 PathProgramCache]: Analyzing trace with hash -365571194, now seen corresponding path program 22 times [2020-10-16 11:32:21,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:21,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360035384] [2020-10-16 11:32:21,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:21,553 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 29 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:21,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360035384] [2020-10-16 11:32:21,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167690655] [2020-10-16 11:32:21,554 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:21,593 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-16 11:32:21,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:21,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-16 11:32:21,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:21,624 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 44 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-16 11:32:21,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:21,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-10-16 11:32:21,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337619429] [2020-10-16 11:32:21,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-16 11:32:21,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:21,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-16 11:32:21,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=330, Unknown=0, NotChecked=0, Total=420 [2020-10-16 11:32:21,625 INFO L87 Difference]: Start difference. First operand 771 states and 1835 transitions. Second operand 21 states. [2020-10-16 11:32:22,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:22,255 INFO L93 Difference]: Finished difference Result 1951 states and 4562 transitions. [2020-10-16 11:32:22,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-16 11:32:22,256 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 35 [2020-10-16 11:32:22,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:22,260 INFO L225 Difference]: With dead ends: 1951 [2020-10-16 11:32:22,261 INFO L226 Difference]: Without dead ends: 1081 [2020-10-16 11:32:22,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=628, Invalid=1724, Unknown=0, NotChecked=0, Total=2352 [2020-10-16 11:32:22,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1081 states. [2020-10-16 11:32:22,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1081 to 637. [2020-10-16 11:32:22,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 637 states. [2020-10-16 11:32:22,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 1488 transitions. [2020-10-16 11:32:22,276 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 1488 transitions. Word has length 35 [2020-10-16 11:32:22,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:22,277 INFO L481 AbstractCegarLoop]: Abstraction has 637 states and 1488 transitions. [2020-10-16 11:32:22,277 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-16 11:32:22,277 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 1488 transitions. [2020-10-16 11:32:22,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:22,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:22,279 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:22,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-16 11:32:22,493 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:22,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:22,493 INFO L82 PathProgramCache]: Analyzing trace with hash 2092017522, now seen corresponding path program 23 times [2020-10-16 11:32:22,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:22,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391627258] [2020-10-16 11:32:22,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:22,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:22,657 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:32:22,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391627258] [2020-10-16 11:32:22,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858831593] [2020-10-16 11:32:22,658 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:22,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-16 11:32:22,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:22,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-16 11:32:22,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:22,743 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 38 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-16 11:32:22,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:22,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-10-16 11:32:22,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519865358] [2020-10-16 11:32:22,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-16 11:32:22,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:22,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-16 11:32:22,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-16 11:32:22,747 INFO L87 Difference]: Start difference. First operand 637 states and 1488 transitions. Second operand 19 states. [2020-10-16 11:32:23,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:23,280 INFO L93 Difference]: Finished difference Result 1790 states and 4143 transitions. [2020-10-16 11:32:23,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-16 11:32:23,280 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 35 [2020-10-16 11:32:23,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:23,283 INFO L225 Difference]: With dead ends: 1790 [2020-10-16 11:32:23,283 INFO L226 Difference]: Without dead ends: 744 [2020-10-16 11:32:23,284 INFO L677 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 [2020-10-16 11:32:23,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2020-10-16 11:32:23,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 453. [2020-10-16 11:32:23,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-16 11:32:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1022 transitions. [2020-10-16 11:32:23,294 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1022 transitions. Word has length 35 [2020-10-16 11:32:23,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:23,295 INFO L481 AbstractCegarLoop]: Abstraction has 453 states and 1022 transitions. [2020-10-16 11:32:23,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-16 11:32:23,295 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1022 transitions. [2020-10-16 11:32:23,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-16 11:32:23,295 INFO L414 BasicCegarLoop]: Found error trace [2020-10-16 11:32:23,296 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-16 11:32:23,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-16 11:32:23,497 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-10-16 11:32:23,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-16 11:32:23,497 INFO L82 PathProgramCache]: Analyzing trace with hash 1602760798, now seen corresponding path program 24 times [2020-10-16 11:32:23,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-16 11:32:23,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784389177] [2020-10-16 11:32:23,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-16 11:32:23,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-16 11:32:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 19 proven. 27 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 11:32:23,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784389177] [2020-10-16 11:32:23,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923169410] [2020-10-16 11:32:23,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-16 11:32:23,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-16 11:32:23,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-16 11:32:23,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-16 11:32:23,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-16 11:32:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 34 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-16 11:32:23,714 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-16 11:32:23,714 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-10-16 11:32:23,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075863717] [2020-10-16 11:32:23,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-16 11:32:23,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-16 11:32:23,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-16 11:32:23,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-16 11:32:23,716 INFO L87 Difference]: Start difference. First operand 453 states and 1022 transitions. Second operand 17 states. [2020-10-16 11:32:24,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-16 11:32:24,107 INFO L93 Difference]: Finished difference Result 1084 states and 2413 transitions. [2020-10-16 11:32:24,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-16 11:32:24,108 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 35 [2020-10-16 11:32:24,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-16 11:32:24,108 INFO L225 Difference]: With dead ends: 1084 [2020-10-16 11:32:24,108 INFO L226 Difference]: Without dead ends: 0 [2020-10-16 11:32:24,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=868, Unknown=0, NotChecked=0, Total=1190 [2020-10-16 11:32:24,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-10-16 11:32:24,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-10-16 11:32:24,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-10-16 11:32:24,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-10-16 11:32:24,110 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 35 [2020-10-16 11:32:24,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-16 11:32:24,110 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-10-16 11:32:24,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-16 11:32:24,111 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-10-16 11:32:24,111 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-10-16 11:32:24,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-16 11:32:24,322 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 16.10 11:32:24 BasicIcfg [2020-10-16 11:32:24,322 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-16 11:32:24,330 INFO L168 Benchmark]: Toolchain (without parser) took 25941.18 ms. Allocated memory was 146.8 MB in the beginning and 390.1 MB in the end (delta: 243.3 MB). Free memory was 100.9 MB in the beginning and 206.4 MB in the end (delta: -105.5 MB). Peak memory consumption was 137.8 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:24,331 INFO L168 Benchmark]: CDTParser took 1.58 ms. Allocated memory is still 146.8 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. [2020-10-16 11:32:24,332 INFO L168 Benchmark]: CACSL2BoogieTranslator took 504.09 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 100.9 MB in the beginning and 182.2 MB in the end (delta: -81.3 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:24,333 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.32 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 180.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:24,333 INFO L168 Benchmark]: Boogie Preprocessor took 25.28 ms. Allocated memory is still 203.9 MB. Free memory was 180.3 MB in the beginning and 179.3 MB in the end (delta: 954.2 kB). Peak memory consumption was 954.2 kB. Max. memory is 7.1 GB. [2020-10-16 11:32:24,334 INFO L168 Benchmark]: RCFGBuilder took 443.30 ms. Allocated memory is still 203.9 MB. Free memory was 179.3 MB in the beginning and 162.5 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:24,335 INFO L168 Benchmark]: TraceAbstraction took 24917.05 ms. Allocated memory was 203.9 MB in the beginning and 390.1 MB in the end (delta: 186.1 MB). Free memory was 161.5 MB in the beginning and 206.4 MB in the end (delta: -44.9 MB). Peak memory consumption was 141.2 MB. Max. memory is 7.1 GB. [2020-10-16 11:32:24,339 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.58 ms. Allocated memory is still 146.8 MB. Free memory was 121.5 MB in the beginning and 121.1 MB in the end (delta: 419.8 kB). Peak memory consumption was 419.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 504.09 ms. Allocated memory was 146.8 MB in the beginning and 203.9 MB in the end (delta: 57.1 MB). Free memory was 100.9 MB in the beginning and 182.2 MB in the end (delta: -81.3 MB). Peak memory consumption was 19.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.32 ms. Allocated memory is still 203.9 MB. Free memory was 182.2 MB in the beginning and 180.3 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 25.28 ms. Allocated memory is still 203.9 MB. Free memory was 180.3 MB in the beginning and 179.3 MB in the end (delta: 954.2 kB). Peak memory consumption was 954.2 kB. Max. memory is 7.1 GB. * RCFGBuilder took 443.30 ms. Allocated memory is still 203.9 MB. Free memory was 179.3 MB in the beginning and 162.5 MB in the end (delta: 16.9 MB). Peak memory consumption was 16.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 24917.05 ms. Allocated memory was 203.9 MB in the beginning and 390.1 MB in the end (delta: 186.1 MB). Free memory was 161.5 MB in the beginning and 206.4 MB in the end (delta: -44.9 MB). Peak memory consumption was 141.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 351 VarBasedMoverChecksPositive, 8 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 8 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 65 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 0.8s, 57 PlacesBefore, 27 PlacesAfterwards, 56 TransitionsBefore, 24 TransitionsAfterwards, 528 CoEnabledTransitionPairs, 4 FixpointIterations, 16 TrivialSequentialCompositions, 12 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 4 ConcurrentYvCompositions, 2 ChoiceCompositions, 34 TotalNumberOfCompositions, 866 MoverChecksTotal - 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: 24.7s, OverallIterations: 26, TraceHistogramMax: 5, AutomataDifference: 11.1s, 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, 3.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1525 GetRequests, 751 SyntacticMatches, 0 SemanticMatches, 774 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6305 ImplicationChecksByTransitivity, 8.6s 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: 0.5s AutomataMinimizationTime, 26 MinimizatonAttempts, 7142 StatesRemovedByMinimization, 23 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 4.7s 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...