/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/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -i ../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-b981219 [2020-04-18 07:26:30,838 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-04-18 07:26:30,840 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-04-18 07:26:30,852 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-04-18 07:26:30,852 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-04-18 07:26:30,853 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-04-18 07:26:30,855 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-04-18 07:26:30,856 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-04-18 07:26:30,858 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-04-18 07:26:30,859 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-04-18 07:26:30,860 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-04-18 07:26:30,861 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-04-18 07:26:30,861 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-04-18 07:26:30,862 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-04-18 07:26:30,864 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-04-18 07:26:30,865 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-04-18 07:26:30,865 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-04-18 07:26:30,866 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-04-18 07:26:30,868 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-04-18 07:26:30,870 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-04-18 07:26:30,872 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-04-18 07:26:30,873 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-04-18 07:26:30,874 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-04-18 07:26:30,875 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-04-18 07:26:30,877 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-04-18 07:26:30,878 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-04-18 07:26:30,878 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-04-18 07:26:30,879 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-04-18 07:26:30,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-04-18 07:26:30,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-04-18 07:26:30,881 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-04-18 07:26:30,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-04-18 07:26:30,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-04-18 07:26:30,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-04-18 07:26:30,884 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-04-18 07:26:30,884 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-04-18 07:26:30,885 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-04-18 07:26:30,885 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-04-18 07:26:30,885 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-04-18 07:26:30,886 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-04-18 07:26:30,887 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-04-18 07:26:30,888 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2020-04-18 07:26:30,902 INFO L113 SettingsManager]: Loading preferences was successful [2020-04-18 07:26:30,903 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-04-18 07:26:30,904 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-04-18 07:26:30,904 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-04-18 07:26:30,904 INFO L138 SettingsManager]: * Use SBE=true [2020-04-18 07:26:30,905 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-04-18 07:26:30,905 INFO L138 SettingsManager]: * sizeof long=4 [2020-04-18 07:26:30,905 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-04-18 07:26:30,905 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-04-18 07:26:30,905 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-04-18 07:26:30,906 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-04-18 07:26:30,906 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-04-18 07:26:30,906 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-04-18 07:26:30,906 INFO L138 SettingsManager]: * sizeof long double=12 [2020-04-18 07:26:30,906 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-04-18 07:26:30,907 INFO L138 SettingsManager]: * Use constant arrays=true [2020-04-18 07:26:30,907 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-04-18 07:26:30,907 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-04-18 07:26:30,907 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-04-18 07:26:30,907 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-04-18 07:26:30,908 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-04-18 07:26:30,908 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 07:26:30,908 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-04-18 07:26:30,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-04-18 07:26:30,909 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-04-18 07:26:30,909 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-04-18 07:26:30,909 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-04-18 07:26:30,909 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-04-18 07:26:30,909 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-04-18 07:26:30,910 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-04-18 07:26:31,206 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-04-18 07:26:31,228 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-04-18 07:26:31,232 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-04-18 07:26:31,233 INFO L271 PluginConnector]: Initializing CDTParser... [2020-04-18 07:26:31,234 INFO L275 PluginConnector]: CDTParser initialized [2020-04-18 07:26:31,235 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-04-18 07:26:31,297 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a02592462/d610fa823c2448d99ff28f5bc5f7b754/FLAG45ab0dcab [2020-04-18 07:26:31,729 INFO L306 CDTParser]: Found 1 translation units. [2020-04-18 07:26:31,730 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/concurrent/pthreads/NonAtomicIncrement_2Threads.c [2020-04-18 07:26:31,730 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2020-04-18 07:26:31,731 WARN L117 ultiparseSymbolTable]: System include stdio.h could not be resolved by CDT -- only built-in system includes are available. [2020-04-18 07:26:31,731 WARN L117 ultiparseSymbolTable]: System include stdbool.h could not be resolved by CDT -- only built-in system includes are available. [2020-04-18 07:26:31,772 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a02592462/d610fa823c2448d99ff28f5bc5f7b754/FLAG45ab0dcab [2020-04-18 07:26:32,129 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a02592462/d610fa823c2448d99ff28f5bc5f7b754 [2020-04-18 07:26:32,140 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-04-18 07:26:32,163 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-04-18 07:26:32,164 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-04-18 07:26:32,164 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-04-18 07:26:32,168 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-04-18 07:26:32,169 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:26:32" (1/1) ... [2020-04-18 07:26:32,172 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@11aa1bf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:26:32, skipping insertion in model container [2020-04-18 07:26:32,172 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.04 07:26:32" (1/1) ... [2020-04-18 07:26:32,180 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-04-18 07:26:32,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-04-18 07:26:32,393 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:26:32,481 INFO L203 MainTranslator]: Completed pre-run [2020-04-18 07:26:32,505 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-04-18 07:26:32,520 INFO L208 MainTranslator]: Completed translation [2020-04-18 07:26:32,521 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:26:32 WrapperNode [2020-04-18 07:26:32,521 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-04-18 07:26:32,522 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-04-18 07:26:32,522 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-04-18 07:26:32,524 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-04-18 07:26:32,532 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:26:32" (1/1) ... [2020-04-18 07:26:32,540 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:26:32" (1/1) ... [2020-04-18 07:26:32,557 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-04-18 07:26:32,557 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-04-18 07:26:32,557 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-04-18 07:26:32,557 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-04-18 07:26:32,565 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:26:32" (1/1) ... [2020-04-18 07:26:32,565 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:26:32" (1/1) ... [2020-04-18 07:26:32,567 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:26:32" (1/1) ... [2020-04-18 07:26:32,567 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:26:32" (1/1) ... [2020-04-18 07:26:32,572 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:26:32" (1/1) ... [2020-04-18 07:26:32,576 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:26:32" (1/1) ... [2020-04-18 07:26:32,578 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:26:32" (1/1) ... [2020-04-18 07:26:32,581 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-04-18 07:26:32,581 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-04-18 07:26:32,581 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-04-18 07:26:32,581 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-04-18 07:26:32,582 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:26:32" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-04-18 07:26:32,650 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-04-18 07:26:32,651 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-04-18 07:26:32,651 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-04-18 07:26:32,651 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-04-18 07:26:32,651 INFO L130 BoogieDeclarations]: Found specification of procedure secondIncrement [2020-04-18 07:26:32,651 INFO L138 BoogieDeclarations]: Found implementation of procedure secondIncrement [2020-04-18 07:26:32,652 INFO L130 BoogieDeclarations]: Found specification of procedure firstIncrement [2020-04-18 07:26:32,652 INFO L138 BoogieDeclarations]: Found implementation of procedure firstIncrement [2020-04-18 07:26:32,652 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-04-18 07:26:32,652 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-04-18 07:26:32,654 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-04-18 07:26:32,968 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-04-18 07:26:32,968 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-04-18 07:26:32,972 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:26:32 BoogieIcfgContainer [2020-04-18 07:26:32,973 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-04-18 07:26:32,974 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-04-18 07:26:32,974 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-04-18 07:26:32,980 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-04-18 07:26:32,984 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.04 07:26:32" (1/3) ... [2020-04-18 07:26:32,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386df4f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:26:32, skipping insertion in model container [2020-04-18 07:26:32,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.04 07:26:32" (2/3) ... [2020-04-18 07:26:32,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@386df4f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.04 07:26:32, skipping insertion in model container [2020-04-18 07:26:32,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.04 07:26:32" (3/3) ... [2020-04-18 07:26:32,988 INFO L109 eAbstractionObserver]: Analyzing ICFG NonAtomicIncrement_2Threads.c [2020-04-18 07:26:32,997 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-04-18 07:26:32,997 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-04-18 07:26:33,004 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-04-18 07:26:33,005 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-04-18 07:26:33,031 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,031 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,031 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,032 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,032 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,032 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,033 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,033 WARN L315 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,033 WARN L315 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,033 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,034 WARN L315 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,034 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,034 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,035 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,035 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,035 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,036 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,036 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,036 WARN L315 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,036 WARN L315 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,037 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,037 WARN L315 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,041 WARN L315 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,041 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~localx~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,041 WARN L315 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#t~post0| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,042 WARN L315 ript$VariableManager]: TermVariabe |firstIncrementThread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,042 WARN L315 ript$VariableManager]: TermVariabe firstIncrementThread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,050 WARN L315 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,051 WARN L315 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,051 WARN L315 ript$VariableManager]: TermVariabe |secondIncrementThread1of1ForFork1_#t~post1| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,051 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~localx~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,051 WARN L315 ript$VariableManager]: TermVariabe secondIncrementThread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-04-18 07:26:33,081 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-04-18 07:26:33,101 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-04-18 07:26:33,101 INFO L376 AbstractCegarLoop]: Hoare is true [2020-04-18 07:26:33,101 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-04-18 07:26:33,102 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-04-18 07:26:33,105 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-04-18 07:26:33,105 INFO L380 AbstractCegarLoop]: Difference is false [2020-04-18 07:26:33,105 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-04-18 07:26:33,105 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-04-18 07:26:33,123 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 57 places, 56 transitions, 134 flow [2020-04-18 07:26:33,171 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 412 states. [2020-04-18 07:26:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states. [2020-04-18 07:26:33,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-18 07:26:33,192 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:26:33,193 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:26:33,194 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:26:33,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:26:33,199 INFO L82 PathProgramCache]: Analyzing trace with hash 608113638, now seen corresponding path program 1 times [2020-04-18 07:26:33,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:26:33,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215245527] [2020-04-18 07:26:33,206 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:26:33,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:33,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:26:33,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215245527] [2020-04-18 07:26:33,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:26:33,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-04-18 07:26:33,345 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678740438] [2020-04-18 07:26:33,351 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-04-18 07:26:33,351 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:26:33,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-04-18 07:26:33,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-04-18 07:26:33,366 INFO L87 Difference]: Start difference. First operand 412 states. Second operand 2 states. [2020-04-18 07:26:33,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:26:33,398 INFO L93 Difference]: Finished difference Result 412 states and 1003 transitions. [2020-04-18 07:26:33,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-04-18 07:26:33,400 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 30 [2020-04-18 07:26:33,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:26:33,424 INFO L225 Difference]: With dead ends: 412 [2020-04-18 07:26:33,425 INFO L226 Difference]: Without dead ends: 404 [2020-04-18 07:26:33,427 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-04-18 07:26:33,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-04-18 07:26:33,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 404. [2020-04-18 07:26:33,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 404 states. [2020-04-18 07:26:33,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 995 transitions. [2020-04-18 07:26:33,524 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 995 transitions. Word has length 30 [2020-04-18 07:26:33,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:26:33,525 INFO L479 AbstractCegarLoop]: Abstraction has 404 states and 995 transitions. [2020-04-18 07:26:33,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-04-18 07:26:33,525 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 995 transitions. [2020-04-18 07:26:33,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-04-18 07:26:33,530 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:26:33,530 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:26:33,531 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:26:33,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:26:33,531 INFO L82 PathProgramCache]: Analyzing trace with hash 446981008, now seen corresponding path program 1 times [2020-04-18 07:26:33,531 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:26:33,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789436914] [2020-04-18 07:26:33,532 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:26:33,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:33,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:26:33,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789436914] [2020-04-18 07:26:33,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-04-18 07:26:33,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-04-18 07:26:33,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645853968] [2020-04-18 07:26:33,618 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-18 07:26:33,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:26:33,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 07:26:33,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-04-18 07:26:33,620 INFO L87 Difference]: Start difference. First operand 404 states and 995 transitions. Second operand 3 states. [2020-04-18 07:26:33,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:26:33,678 INFO L93 Difference]: Finished difference Result 584 states and 1455 transitions. [2020-04-18 07:26:33,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-18 07:26:33,679 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-04-18 07:26:33,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:26:33,686 INFO L225 Difference]: With dead ends: 584 [2020-04-18 07:26:33,686 INFO L226 Difference]: Without dead ends: 584 [2020-04-18 07:26:33,687 INFO L678 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 [2020-04-18 07:26:33,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2020-04-18 07:26:33,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 440. [2020-04-18 07:26:33,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 440 states. [2020-04-18 07:26:33,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1087 transitions. [2020-04-18 07:26:33,722 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1087 transitions. Word has length 30 [2020-04-18 07:26:33,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:26:33,722 INFO L479 AbstractCegarLoop]: Abstraction has 440 states and 1087 transitions. [2020-04-18 07:26:33,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-18 07:26:33,722 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1087 transitions. [2020-04-18 07:26:33,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-04-18 07:26:33,726 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:26:33,726 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:26:33,726 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:26:33,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:26:33,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1132558260, now seen corresponding path program 1 times [2020-04-18 07:26:33,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:26:33,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271545525] [2020-04-18 07:26:33,727 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:26:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:26:33,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271545525] [2020-04-18 07:26:33,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596500493] [2020-04-18 07:26:33,826 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:33,890 INFO L264 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 2 conjunts are in the unsatisfiable core [2020-04-18 07:26:33,899 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:26:33,963 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:26:33,964 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-04-18 07:26:33,964 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 6 [2020-04-18 07:26:33,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611038396] [2020-04-18 07:26:33,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-04-18 07:26:33,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:26:33,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-04-18 07:26:33,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:26:33,969 INFO L87 Difference]: Start difference. First operand 440 states and 1087 transitions. Second operand 3 states. [2020-04-18 07:26:34,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:26:34,002 INFO L93 Difference]: Finished difference Result 620 states and 1557 transitions. [2020-04-18 07:26:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-04-18 07:26:34,003 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 36 [2020-04-18 07:26:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:26:34,009 INFO L225 Difference]: With dead ends: 620 [2020-04-18 07:26:34,010 INFO L226 Difference]: Without dead ends: 620 [2020-04-18 07:26:34,010 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-04-18 07:26:34,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-04-18 07:26:34,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 476. [2020-04-18 07:26:34,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 476 states. [2020-04-18 07:26:34,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 1181 transitions. [2020-04-18 07:26:34,056 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 1181 transitions. Word has length 36 [2020-04-18 07:26:34,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:26:34,057 INFO L479 AbstractCegarLoop]: Abstraction has 476 states and 1181 transitions. [2020-04-18 07:26:34,057 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-04-18 07:26:34,058 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 1181 transitions. [2020-04-18 07:26:34,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-04-18 07:26:34,076 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:26:34,076 INFO L425 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:26:34,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:34,280 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:26:34,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:26:34,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1634590256, now seen corresponding path program 1 times [2020-04-18 07:26:34,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:26:34,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343920164] [2020-04-18 07:26:34,283 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:26:34,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:26:34,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343920164] [2020-04-18 07:26:34,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141087090] [2020-04-18 07:26:34,367 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:34,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:34,430 INFO L264 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 4 conjunts are in the unsatisfiable core [2020-04-18 07:26:34,436 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:26:34,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:26:34,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:26:34,480 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2020-04-18 07:26:34,480 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727510605] [2020-04-18 07:26:34,480 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-04-18 07:26:34,481 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:26:34,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-04-18 07:26:34,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-04-18 07:26:34,482 INFO L87 Difference]: Start difference. First operand 476 states and 1181 transitions. Second operand 8 states. [2020-04-18 07:26:34,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:26:34,947 INFO L93 Difference]: Finished difference Result 1526 states and 3921 transitions. [2020-04-18 07:26:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-18 07:26:34,948 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 42 [2020-04-18 07:26:34,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:26:34,959 INFO L225 Difference]: With dead ends: 1526 [2020-04-18 07:26:34,960 INFO L226 Difference]: Without dead ends: 1526 [2020-04-18 07:26:34,961 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=220, Invalid=536, Unknown=0, NotChecked=0, Total=756 [2020-04-18 07:26:34,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1526 states. [2020-04-18 07:26:35,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1526 to 1034. [2020-04-18 07:26:35,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1034 states. [2020-04-18 07:26:35,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1034 states to 1034 states and 2633 transitions. [2020-04-18 07:26:35,008 INFO L78 Accepts]: Start accepts. Automaton has 1034 states and 2633 transitions. Word has length 42 [2020-04-18 07:26:35,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:26:35,008 INFO L479 AbstractCegarLoop]: Abstraction has 1034 states and 2633 transitions. [2020-04-18 07:26:35,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-04-18 07:26:35,009 INFO L276 IsEmpty]: Start isEmpty. Operand 1034 states and 2633 transitions. [2020-04-18 07:26:35,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-04-18 07:26:35,013 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:26:35,014 INFO L425 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:26:35,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:35,219 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:26:35,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:26:35,220 INFO L82 PathProgramCache]: Analyzing trace with hash -578844552, now seen corresponding path program 2 times [2020-04-18 07:26:35,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:26:35,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128724499] [2020-04-18 07:26:35,222 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:26:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:35,645 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:26:35,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128724499] [2020-04-18 07:26:35,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1645889307] [2020-04-18 07:26:35,646 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:35,700 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:26:35,704 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:26:35,705 INFO L264 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 07:26:35,713 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:26:35,814 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-04-18 07:26:35,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:26:35,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 23 [2020-04-18 07:26:35,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505885031] [2020-04-18 07:26:35,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 07:26:35,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:26:35,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 07:26:35,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-04-18 07:26:35,817 INFO L87 Difference]: Start difference. First operand 1034 states and 2633 transitions. Second operand 23 states. [2020-04-18 07:26:38,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:26:38,900 INFO L93 Difference]: Finished difference Result 2663 states and 6917 transitions. [2020-04-18 07:26:38,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2020-04-18 07:26:38,901 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 54 [2020-04-18 07:26:38,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:26:38,916 INFO L225 Difference]: With dead ends: 2663 [2020-04-18 07:26:38,916 INFO L226 Difference]: Without dead ends: 2663 [2020-04-18 07:26:38,920 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5062 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=2238, Invalid=10872, Unknown=0, NotChecked=0, Total=13110 [2020-04-18 07:26:38,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2663 states. [2020-04-18 07:26:38,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2663 to 1358. [2020-04-18 07:26:38,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1358 states. [2020-04-18 07:26:38,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1358 states to 1358 states and 3485 transitions. [2020-04-18 07:26:38,968 INFO L78 Accepts]: Start accepts. Automaton has 1358 states and 3485 transitions. Word has length 54 [2020-04-18 07:26:38,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:26:38,970 INFO L479 AbstractCegarLoop]: Abstraction has 1358 states and 3485 transitions. [2020-04-18 07:26:38,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 07:26:38,971 INFO L276 IsEmpty]: Start isEmpty. Operand 1358 states and 3485 transitions. [2020-04-18 07:26:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-04-18 07:26:38,975 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:26:38,975 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:26:39,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:39,179 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:26:39,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:26:39,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1629047036, now seen corresponding path program 3 times [2020-04-18 07:26:39,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:26:39,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911622108] [2020-04-18 07:26:39,180 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:26:39,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:39,436 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-04-18 07:26:39,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911622108] [2020-04-18 07:26:39,437 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109596304] [2020-04-18 07:26:39,437 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:39,496 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-04-18 07:26:39,497 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:26:39,497 INFO L264 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 6 conjunts are in the unsatisfiable core [2020-04-18 07:26:39,505 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:26:39,591 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-04-18 07:26:39,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:26:39,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 25 [2020-04-18 07:26:39,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055797920] [2020-04-18 07:26:39,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-18 07:26:39,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:26:39,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 07:26:39,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:26:39,595 INFO L87 Difference]: Start difference. First operand 1358 states and 3485 transitions. Second operand 25 states. [2020-04-18 07:26:41,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:26:41,780 INFO L93 Difference]: Finished difference Result 4630 states and 12050 transitions. [2020-04-18 07:26:41,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-04-18 07:26:41,780 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-04-18 07:26:41,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:26:41,810 INFO L225 Difference]: With dead ends: 4630 [2020-04-18 07:26:41,810 INFO L226 Difference]: Without dead ends: 4604 [2020-04-18 07:26:41,813 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3041 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1827, Invalid=7103, Unknown=0, NotChecked=0, Total=8930 [2020-04-18 07:26:41,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4604 states. [2020-04-18 07:26:41,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4604 to 2075. [2020-04-18 07:26:41,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2075 states. [2020-04-18 07:26:41,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2075 states to 2075 states and 5421 transitions. [2020-04-18 07:26:41,896 INFO L78 Accepts]: Start accepts. Automaton has 2075 states and 5421 transitions. Word has length 60 [2020-04-18 07:26:41,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:26:41,896 INFO L479 AbstractCegarLoop]: Abstraction has 2075 states and 5421 transitions. [2020-04-18 07:26:41,896 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-18 07:26:41,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2075 states and 5421 transitions. [2020-04-18 07:26:41,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-04-18 07:26:41,904 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:26:41,904 INFO L425 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:26:42,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:42,109 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:26:42,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:26:42,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1677696190, now seen corresponding path program 1 times [2020-04-18 07:26:42,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:26:42,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798402309] [2020-04-18 07:26:42,110 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:26:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:42,190 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2020-04-18 07:26:42,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798402309] [2020-04-18 07:26:42,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457332211] [2020-04-18 07:26:42,191 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:42,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:42,228 INFO L264 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:26:42,231 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:26:42,320 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 7 proven. 21 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-18 07:26:42,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:26:42,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 9] total 12 [2020-04-18 07:26:42,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396373592] [2020-04-18 07:26:42,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-04-18 07:26:42,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:26:42,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-04-18 07:26:42,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-04-18 07:26:42,322 INFO L87 Difference]: Start difference. First operand 2075 states and 5421 transitions. Second operand 12 states. [2020-04-18 07:26:42,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:26:42,830 INFO L93 Difference]: Finished difference Result 2813 states and 7316 transitions. [2020-04-18 07:26:42,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-04-18 07:26:42,831 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-04-18 07:26:42,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:26:42,847 INFO L225 Difference]: With dead ends: 2813 [2020-04-18 07:26:42,848 INFO L226 Difference]: Without dead ends: 2744 [2020-04-18 07:26:42,848 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=770, Unknown=0, NotChecked=0, Total=1122 [2020-04-18 07:26:42,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2744 states. [2020-04-18 07:26:42,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2744 to 2171. [2020-04-18 07:26:42,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2171 states. [2020-04-18 07:26:42,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2171 states to 2171 states and 5662 transitions. [2020-04-18 07:26:42,905 INFO L78 Accepts]: Start accepts. Automaton has 2171 states and 5662 transitions. Word has length 66 [2020-04-18 07:26:42,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:26:42,906 INFO L479 AbstractCegarLoop]: Abstraction has 2171 states and 5662 transitions. [2020-04-18 07:26:42,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-04-18 07:26:42,906 INFO L276 IsEmpty]: Start isEmpty. Operand 2171 states and 5662 transitions. [2020-04-18 07:26:42,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-04-18 07:26:42,936 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:26:42,937 INFO L425 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:26:43,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:43,144 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:26:43,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:26:43,145 INFO L82 PathProgramCache]: Analyzing trace with hash 132335012, now seen corresponding path program 4 times [2020-04-18 07:26:43,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:26:43,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857498740] [2020-04-18 07:26:43,145 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:26:43,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:43,455 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-18 07:26:43,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857498740] [2020-04-18 07:26:43,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403278687] [2020-04-18 07:26:43,456 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-18 07:26:43,504 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:26:43,505 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:26:43,505 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:26:43,508 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:26:43,652 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 5 proven. 40 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-04-18 07:26:43,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:26:43,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 31 [2020-04-18 07:26:43,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582936894] [2020-04-18 07:26:43,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-04-18 07:26:43,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:26:43,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-04-18 07:26:43,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=795, Unknown=0, NotChecked=0, Total=930 [2020-04-18 07:26:43,655 INFO L87 Difference]: Start difference. First operand 2171 states and 5662 transitions. Second operand 31 states. [2020-04-18 07:26:48,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:26:48,929 INFO L93 Difference]: Finished difference Result 4850 states and 12736 transitions. [2020-04-18 07:26:48,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2020-04-18 07:26:48,929 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 72 [2020-04-18 07:26:48,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:26:48,953 INFO L225 Difference]: With dead ends: 4850 [2020-04-18 07:26:48,954 INFO L226 Difference]: Without dead ends: 4850 [2020-04-18 07:26:48,963 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 411 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15291 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=5885, Invalid=29647, Unknown=0, NotChecked=0, Total=35532 [2020-04-18 07:26:48,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4850 states. [2020-04-18 07:26:49,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4850 to 2603. [2020-04-18 07:26:49,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2603 states. [2020-04-18 07:26:49,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2603 states to 2603 states and 6802 transitions. [2020-04-18 07:26:49,035 INFO L78 Accepts]: Start accepts. Automaton has 2603 states and 6802 transitions. Word has length 72 [2020-04-18 07:26:49,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:26:49,035 INFO L479 AbstractCegarLoop]: Abstraction has 2603 states and 6802 transitions. [2020-04-18 07:26:49,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-04-18 07:26:49,035 INFO L276 IsEmpty]: Start isEmpty. Operand 2603 states and 6802 transitions. [2020-04-18 07:26:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-04-18 07:26:49,042 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:26:49,042 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:26:49,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:49,246 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:26:49,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:26:49,247 INFO L82 PathProgramCache]: Analyzing trace with hash 208104744, now seen corresponding path program 5 times [2020-04-18 07:26:49,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:26:49,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752080499] [2020-04-18 07:26:49,248 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:26:49,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-04-18 07:26:49,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752080499] [2020-04-18 07:26:49,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752317710] [2020-04-18 07:26:49,381 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:49,430 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-18 07:26:49,430 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:26:49,433 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:26:49,437 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:26:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 21 proven. 5 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-04-18 07:26:49,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:26:49,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 18 [2020-04-18 07:26:49,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013626887] [2020-04-18 07:26:49,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 07:26:49,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:26:49,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:26:49,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:26:49,529 INFO L87 Difference]: Start difference. First operand 2603 states and 6802 transitions. Second operand 19 states. [2020-04-18 07:26:50,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:26:50,166 INFO L93 Difference]: Finished difference Result 6424 states and 16859 transitions. [2020-04-18 07:26:50,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-18 07:26:50,166 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 78 [2020-04-18 07:26:50,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:26:50,184 INFO L225 Difference]: With dead ends: 6424 [2020-04-18 07:26:50,184 INFO L226 Difference]: Without dead ends: 6278 [2020-04-18 07:26:50,184 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2020-04-18 07:26:50,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6278 states. [2020-04-18 07:26:50,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6278 to 3827. [2020-04-18 07:26:50,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3827 states. [2020-04-18 07:26:50,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 10138 transitions. [2020-04-18 07:26:50,287 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 10138 transitions. Word has length 78 [2020-04-18 07:26:50,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:26:50,288 INFO L479 AbstractCegarLoop]: Abstraction has 3827 states and 10138 transitions. [2020-04-18 07:26:50,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 07:26:50,288 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 10138 transitions. [2020-04-18 07:26:50,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-04-18 07:26:50,298 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:26:50,298 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:26:50,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:50,506 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:26:50,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:26:50,506 INFO L82 PathProgramCache]: Analyzing trace with hash -1315555484, now seen corresponding path program 6 times [2020-04-18 07:26:50,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:26:50,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544584901] [2020-04-18 07:26:50,506 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:26:50,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:50,818 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 48 proven. 28 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-04-18 07:26:50,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544584901] [2020-04-18 07:26:50,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457587176] [2020-04-18 07:26:50,820 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:50,888 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-18 07:26:50,888 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:26:50,889 INFO L264 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:26:50,891 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:26:51,019 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 5 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2020-04-18 07:26:51,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:26:51,020 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 9] total 27 [2020-04-18 07:26:51,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121669751] [2020-04-18 07:26:51,021 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-18 07:26:51,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:26:51,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 07:26:51,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2020-04-18 07:26:51,022 INFO L87 Difference]: Start difference. First operand 3827 states and 10138 transitions. Second operand 27 states. [2020-04-18 07:26:52,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:26:52,841 INFO L93 Difference]: Finished difference Result 8002 states and 21224 transitions. [2020-04-18 07:26:52,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-04-18 07:26:52,841 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 78 [2020-04-18 07:26:52,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:26:52,860 INFO L225 Difference]: With dead ends: 8002 [2020-04-18 07:26:52,860 INFO L226 Difference]: Without dead ends: 7760 [2020-04-18 07:26:52,862 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2412 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1387, Invalid=6623, Unknown=0, NotChecked=0, Total=8010 [2020-04-18 07:26:52,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7760 states. [2020-04-18 07:26:52,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7760 to 5438. [2020-04-18 07:26:52,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5438 states. [2020-04-18 07:26:53,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5438 states to 5438 states and 14425 transitions. [2020-04-18 07:26:53,002 INFO L78 Accepts]: Start accepts. Automaton has 5438 states and 14425 transitions. Word has length 78 [2020-04-18 07:26:53,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:26:53,002 INFO L479 AbstractCegarLoop]: Abstraction has 5438 states and 14425 transitions. [2020-04-18 07:26:53,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-18 07:26:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 5438 states and 14425 transitions. [2020-04-18 07:26:53,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-04-18 07:26:53,016 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:26:53,017 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:26:53,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:53,222 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:26:53,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:26:53,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1228136884, now seen corresponding path program 7 times [2020-04-18 07:26:53,222 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:26:53,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651383740] [2020-04-18 07:26:53,223 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:26:53,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:53,554 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 33 proven. 51 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-04-18 07:26:53,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651383740] [2020-04-18 07:26:53,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103779809] [2020-04-18 07:26:53,555 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:53,602 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjunts are in the unsatisfiable core [2020-04-18 07:26:53,604 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:26:53,900 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 93 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:26:53,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:26:53,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 36 [2020-04-18 07:26:53,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639943371] [2020-04-18 07:26:53,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-04-18 07:26:53,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:26:53,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-04-18 07:26:53,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1150, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 07:26:53,902 INFO L87 Difference]: Start difference. First operand 5438 states and 14425 transitions. Second operand 37 states. [2020-04-18 07:26:59,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:26:59,227 INFO L93 Difference]: Finished difference Result 21256 states and 56188 transitions. [2020-04-18 07:26:59,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-04-18 07:26:59,228 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 84 [2020-04-18 07:26:59,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:26:59,247 INFO L225 Difference]: With dead ends: 21256 [2020-04-18 07:26:59,248 INFO L226 Difference]: Without dead ends: 11528 [2020-04-18 07:26:59,250 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7384 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4712, Invalid=20094, Unknown=0, NotChecked=0, Total=24806 [2020-04-18 07:26:59,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11528 states. [2020-04-18 07:26:59,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11528 to 6545. [2020-04-18 07:26:59,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6545 states. [2020-04-18 07:26:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6545 states to 6545 states and 17281 transitions. [2020-04-18 07:26:59,415 INFO L78 Accepts]: Start accepts. Automaton has 6545 states and 17281 transitions. Word has length 84 [2020-04-18 07:26:59,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:26:59,416 INFO L479 AbstractCegarLoop]: Abstraction has 6545 states and 17281 transitions. [2020-04-18 07:26:59,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-04-18 07:26:59,416 INFO L276 IsEmpty]: Start isEmpty. Operand 6545 states and 17281 transitions. [2020-04-18 07:26:59,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-04-18 07:26:59,429 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:26:59,429 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:26:59,633 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:59,633 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:26:59,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:26:59,634 INFO L82 PathProgramCache]: Analyzing trace with hash -430182112, now seen corresponding path program 8 times [2020-04-18 07:26:59,634 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:26:59,635 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797183542] [2020-04-18 07:26:59,635 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:26:59,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:26:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2020-04-18 07:26:59,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797183542] [2020-04-18 07:26:59,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000315125] [2020-04-18 07:26:59,788 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:26:59,827 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:26:59,827 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:26:59,828 INFO L264 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:26:59,829 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:27:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 40 proven. 25 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-04-18 07:27:00,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:27:00,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 24 [2020-04-18 07:27:00,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510296402] [2020-04-18 07:27:00,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-04-18 07:27:00,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:27:00,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-04-18 07:27:00,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2020-04-18 07:27:00,012 INFO L87 Difference]: Start difference. First operand 6545 states and 17281 transitions. Second operand 25 states. [2020-04-18 07:27:01,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:27:01,494 INFO L93 Difference]: Finished difference Result 20724 states and 54416 transitions. [2020-04-18 07:27:01,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-04-18 07:27:01,495 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 84 [2020-04-18 07:27:01,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:27:01,506 INFO L225 Difference]: With dead ends: 20724 [2020-04-18 07:27:01,507 INFO L226 Difference]: Without dead ends: 5279 [2020-04-18 07:27:01,508 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=878, Invalid=3154, Unknown=0, NotChecked=0, Total=4032 [2020-04-18 07:27:01,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5279 states. [2020-04-18 07:27:01,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5279 to 4340. [2020-04-18 07:27:01,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4340 states. [2020-04-18 07:27:01,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4340 states to 4340 states and 11273 transitions. [2020-04-18 07:27:01,604 INFO L78 Accepts]: Start accepts. Automaton has 4340 states and 11273 transitions. Word has length 84 [2020-04-18 07:27:01,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:27:01,604 INFO L479 AbstractCegarLoop]: Abstraction has 4340 states and 11273 transitions. [2020-04-18 07:27:01,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-04-18 07:27:01,604 INFO L276 IsEmpty]: Start isEmpty. Operand 4340 states and 11273 transitions. [2020-04-18 07:27:01,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-04-18 07:27:01,613 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:27:01,613 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:27:01,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:27:01,826 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:27:01,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:27:01,827 INFO L82 PathProgramCache]: Analyzing trace with hash 2091514692, now seen corresponding path program 9 times [2020-04-18 07:27:01,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:27:01,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489009141] [2020-04-18 07:27:01,828 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:27:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:27:02,062 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 33 proven. 48 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-04-18 07:27:02,062 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489009141] [2020-04-18 07:27:02,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69851269] [2020-04-18 07:27:02,063 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:27:02,124 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-04-18 07:27:02,125 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:27:02,126 INFO L264 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 10 conjunts are in the unsatisfiable core [2020-04-18 07:27:02,127 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:27:02,327 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 5 proven. 56 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2020-04-18 07:27:02,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:27:02,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 11] total 27 [2020-04-18 07:27:02,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038967447] [2020-04-18 07:27:02,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-04-18 07:27:02,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:27:02,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-04-18 07:27:02,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2020-04-18 07:27:02,330 INFO L87 Difference]: Start difference. First operand 4340 states and 11273 transitions. Second operand 27 states. [2020-04-18 07:27:04,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:27:04,080 INFO L93 Difference]: Finished difference Result 9163 states and 23819 transitions. [2020-04-18 07:27:04,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-04-18 07:27:04,081 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 84 [2020-04-18 07:27:04,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:27:04,095 INFO L225 Difference]: With dead ends: 9163 [2020-04-18 07:27:04,096 INFO L226 Difference]: Without dead ends: 8945 [2020-04-18 07:27:04,097 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2552 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1460, Invalid=6730, Unknown=0, NotChecked=0, Total=8190 [2020-04-18 07:27:04,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8945 states. [2020-04-18 07:27:04,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8945 to 7121. [2020-04-18 07:27:04,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7121 states. [2020-04-18 07:27:04,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7121 states to 7121 states and 18551 transitions. [2020-04-18 07:27:04,251 INFO L78 Accepts]: Start accepts. Automaton has 7121 states and 18551 transitions. Word has length 84 [2020-04-18 07:27:04,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:27:04,252 INFO L479 AbstractCegarLoop]: Abstraction has 7121 states and 18551 transitions. [2020-04-18 07:27:04,252 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-04-18 07:27:04,252 INFO L276 IsEmpty]: Start isEmpty. Operand 7121 states and 18551 transitions. [2020-04-18 07:27:04,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-04-18 07:27:04,268 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:27:04,268 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:27:04,471 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:27:04,472 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:27:04,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:27:04,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1821007908, now seen corresponding path program 10 times [2020-04-18 07:27:04,472 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:27:04,473 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587682801] [2020-04-18 07:27:04,473 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:27:04,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:27:04,675 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 104 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:27:04,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587682801] [2020-04-18 07:27:04,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558660279] [2020-04-18 07:27:04,676 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-04-18 07:27:04,719 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-04-18 07:27:04,720 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:27:04,721 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 20 conjunts are in the unsatisfiable core [2020-04-18 07:27:04,722 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:27:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 126 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-04-18 07:27:04,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:27:04,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-04-18 07:27:04,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443531181] [2020-04-18 07:27:04,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-04-18 07:27:04,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:27:04,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-04-18 07:27:04,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=400, Unknown=0, NotChecked=0, Total=506 [2020-04-18 07:27:04,757 INFO L87 Difference]: Start difference. First operand 7121 states and 18551 transitions. Second operand 23 states. [2020-04-18 07:27:05,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:27:05,380 INFO L93 Difference]: Finished difference Result 14864 states and 38814 transitions. [2020-04-18 07:27:05,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-04-18 07:27:05,380 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2020-04-18 07:27:05,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:27:05,392 INFO L225 Difference]: With dead ends: 14864 [2020-04-18 07:27:05,392 INFO L226 Difference]: Without dead ends: 9266 [2020-04-18 07:27:05,392 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=518, Invalid=1288, Unknown=0, NotChecked=0, Total=1806 [2020-04-18 07:27:05,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9266 states. [2020-04-18 07:27:05,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9266 to 6296. [2020-04-18 07:27:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6296 states. [2020-04-18 07:27:05,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6296 states to 6296 states and 16399 transitions. [2020-04-18 07:27:05,523 INFO L78 Accepts]: Start accepts. Automaton has 6296 states and 16399 transitions. Word has length 90 [2020-04-18 07:27:05,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:27:05,523 INFO L479 AbstractCegarLoop]: Abstraction has 6296 states and 16399 transitions. [2020-04-18 07:27:05,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-04-18 07:27:05,524 INFO L276 IsEmpty]: Start isEmpty. Operand 6296 states and 16399 transitions. [2020-04-18 07:27:05,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-04-18 07:27:05,538 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:27:05,539 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:27:05,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:27:05,743 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:27:05,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:27:05,743 INFO L82 PathProgramCache]: Analyzing trace with hash -1760561816, now seen corresponding path program 11 times [2020-04-18 07:27:05,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:27:05,744 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441966459] [2020-04-18 07:27:05,744 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:27:05,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:27:05,897 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 71 proven. 55 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 07:27:05,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441966459] [2020-04-18 07:27:05,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235156534] [2020-04-18 07:27:05,898 INFO L92 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:27:05,944 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-04-18 07:27:05,944 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:27:05,945 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjunts are in the unsatisfiable core [2020-04-18 07:27:05,947 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:27:05,982 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 89 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-04-18 07:27:05,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:27:05,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-04-18 07:27:05,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171502724] [2020-04-18 07:27:05,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-04-18 07:27:05,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:27:05,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-04-18 07:27:05,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-04-18 07:27:05,984 INFO L87 Difference]: Start difference. First operand 6296 states and 16399 transitions. Second operand 19 states. [2020-04-18 07:27:06,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:27:06,432 INFO L93 Difference]: Finished difference Result 17994 states and 46938 transitions. [2020-04-18 07:27:06,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-04-18 07:27:06,432 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 90 [2020-04-18 07:27:06,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:27:06,442 INFO L225 Difference]: With dead ends: 17994 [2020-04-18 07:27:06,443 INFO L226 Difference]: Without dead ends: 6740 [2020-04-18 07:27:06,443 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=356, Invalid=904, Unknown=0, NotChecked=0, Total=1260 [2020-04-18 07:27:06,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6740 states. [2020-04-18 07:27:06,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6740 to 4505. [2020-04-18 07:27:06,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4505 states. [2020-04-18 07:27:06,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4505 states to 4505 states and 11653 transitions. [2020-04-18 07:27:06,532 INFO L78 Accepts]: Start accepts. Automaton has 4505 states and 11653 transitions. Word has length 90 [2020-04-18 07:27:06,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:27:06,532 INFO L479 AbstractCegarLoop]: Abstraction has 4505 states and 11653 transitions. [2020-04-18 07:27:06,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-04-18 07:27:06,533 INFO L276 IsEmpty]: Start isEmpty. Operand 4505 states and 11653 transitions. [2020-04-18 07:27:06,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-04-18 07:27:06,544 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:27:06,545 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:27:06,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:27:06,750 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:27:06,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:27:06,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1986567320, now seen corresponding path program 12 times [2020-04-18 07:27:06,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:27:06,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977548583] [2020-04-18 07:27:06,753 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:27:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:27:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 59 proven. 57 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-18 07:27:06,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977548583] [2020-04-18 07:27:06,901 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844549128] [2020-04-18 07:27:06,902 INFO L92 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:27:06,964 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-04-18 07:27:06,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:27:06,966 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 14 conjunts are in the unsatisfiable core [2020-04-18 07:27:06,967 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:27:07,061 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 74 proven. 42 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-04-18 07:27:07,062 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:27:07,063 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 16 [2020-04-18 07:27:07,063 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789236906] [2020-04-18 07:27:07,063 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-04-18 07:27:07,063 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:27:07,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-04-18 07:27:07,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-04-18 07:27:07,064 INFO L87 Difference]: Start difference. First operand 4505 states and 11653 transitions. Second operand 17 states. [2020-04-18 07:27:07,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:27:07,465 INFO L93 Difference]: Finished difference Result 19236 states and 50034 transitions. [2020-04-18 07:27:07,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-04-18 07:27:07,465 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 90 [2020-04-18 07:27:07,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:27:07,473 INFO L225 Difference]: With dead ends: 19236 [2020-04-18 07:27:07,473 INFO L226 Difference]: Without dead ends: 6089 [2020-04-18 07:27:07,474 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-04-18 07:27:07,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6089 states. [2020-04-18 07:27:07,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6089 to 4001. [2020-04-18 07:27:07,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4001 states. [2020-04-18 07:27:07,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4001 states to 4001 states and 10309 transitions. [2020-04-18 07:27:07,547 INFO L78 Accepts]: Start accepts. Automaton has 4001 states and 10309 transitions. Word has length 90 [2020-04-18 07:27:07,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:27:07,548 INFO L479 AbstractCegarLoop]: Abstraction has 4001 states and 10309 transitions. [2020-04-18 07:27:07,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-04-18 07:27:07,548 INFO L276 IsEmpty]: Start isEmpty. Operand 4001 states and 10309 transitions. [2020-04-18 07:27:07,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-04-18 07:27:07,557 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:27:07,558 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:27:07,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:27:07,769 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:27:07,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:27:07,770 INFO L82 PathProgramCache]: Analyzing trace with hash 676614504, now seen corresponding path program 13 times [2020-04-18 07:27:07,770 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:27:07,770 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690032369] [2020-04-18 07:27:07,770 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:27:07,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:27:07,866 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 53 proven. 47 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-04-18 07:27:07,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690032369] [2020-04-18 07:27:07,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316089708] [2020-04-18 07:27:07,867 INFO L92 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:27:07,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:27:07,910 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 12 conjunts are in the unsatisfiable core [2020-04-18 07:27:07,911 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:27:07,944 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 65 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-04-18 07:27:07,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:27:07,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-04-18 07:27:07,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [486448573] [2020-04-18 07:27:07,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-04-18 07:27:07,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:27:07,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-04-18 07:27:07,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-04-18 07:27:07,946 INFO L87 Difference]: Start difference. First operand 4001 states and 10309 transitions. Second operand 15 states. [2020-04-18 07:27:08,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:27:08,369 INFO L93 Difference]: Finished difference Result 16834 states and 43737 transitions. [2020-04-18 07:27:08,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-04-18 07:27:08,370 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 90 [2020-04-18 07:27:08,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:27:08,388 INFO L225 Difference]: With dead ends: 16834 [2020-04-18 07:27:08,389 INFO L226 Difference]: Without dead ends: 15914 [2020-04-18 07:27:08,389 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=401, Invalid=931, Unknown=0, NotChecked=0, Total=1332 [2020-04-18 07:27:08,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15914 states. [2020-04-18 07:27:08,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15914 to 3428. [2020-04-18 07:27:08,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3428 states. [2020-04-18 07:27:08,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3428 states to 3428 states and 8823 transitions. [2020-04-18 07:27:08,506 INFO L78 Accepts]: Start accepts. Automaton has 3428 states and 8823 transitions. Word has length 90 [2020-04-18 07:27:08,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:27:08,506 INFO L479 AbstractCegarLoop]: Abstraction has 3428 states and 8823 transitions. [2020-04-18 07:27:08,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-04-18 07:27:08,506 INFO L276 IsEmpty]: Start isEmpty. Operand 3428 states and 8823 transitions. [2020-04-18 07:27:08,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-04-18 07:27:08,513 INFO L417 BasicCegarLoop]: Found error trace [2020-04-18 07:27:08,513 INFO L425 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-04-18 07:27:08,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:27:08,716 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2020-04-18 07:27:08,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-04-18 07:27:08,717 INFO L82 PathProgramCache]: Analyzing trace with hash -2111671876, now seen corresponding path program 14 times [2020-04-18 07:27:08,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-04-18 07:27:08,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265351813] [2020-04-18 07:27:08,718 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-04-18 07:27:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-04-18 07:27:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 9 proven. 87 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-04-18 07:27:08,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265351813] [2020-04-18 07:27:08,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259147682] [2020-04-18 07:27:08,805 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:27:08,864 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-04-18 07:27:08,864 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2020-04-18 07:27:08,865 INFO L264 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjunts are in the unsatisfiable core [2020-04-18 07:27:08,867 INFO L287 TraceCheckSpWp]: Computing forward predicates... [2020-04-18 07:27:08,919 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 20 proven. 76 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-04-18 07:27:08,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-04-18 07:27:08,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-04-18 07:27:08,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645652071] [2020-04-18 07:27:08,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-04-18 07:27:08,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-04-18 07:27:08,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-04-18 07:27:08,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-04-18 07:27:08,921 INFO L87 Difference]: Start difference. First operand 3428 states and 8823 transitions. Second operand 11 states. [2020-04-18 07:27:09,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-04-18 07:27:09,167 INFO L93 Difference]: Finished difference Result 6322 states and 16416 transitions. [2020-04-18 07:27:09,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-04-18 07:27:09,167 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 90 [2020-04-18 07:27:09,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-04-18 07:27:09,168 INFO L225 Difference]: With dead ends: 6322 [2020-04-18 07:27:09,168 INFO L226 Difference]: Without dead ends: 0 [2020-04-18 07:27:09,168 INFO L678 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2020-04-18 07:27:09,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-04-18 07:27:09,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-04-18 07:27:09,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-04-18 07:27:09,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-04-18 07:27:09,169 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 90 [2020-04-18 07:27:09,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-04-18 07:27:09,169 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-04-18 07:27:09,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-04-18 07:27:09,170 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-04-18 07:27:09,170 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-04-18 07:27:09,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-04-18 07:27:09,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.04 07:27:09 BasicIcfg [2020-04-18 07:27:09,380 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-04-18 07:27:09,382 INFO L168 Benchmark]: Toolchain (without parser) took 37240.29 ms. Allocated memory was 136.8 MB in the beginning and 640.7 MB in the end (delta: 503.8 MB). Free memory was 98.6 MB in the beginning and 90.3 MB in the end (delta: 8.3 MB). Peak memory consumption was 512.1 MB. Max. memory is 7.1 GB. [2020-04-18 07:27:09,383 INFO L168 Benchmark]: CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-04-18 07:27:09,383 INFO L168 Benchmark]: CACSL2BoogieTranslator took 357.45 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 96.6 MB in the beginning and 178.4 MB in the end (delta: -81.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. [2020-04-18 07:27:09,383 INFO L168 Benchmark]: Boogie Procedure Inliner took 35.13 ms. Allocated memory is still 201.3 MB. Free memory was 178.4 MB in the beginning and 177.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-18 07:27:09,384 INFO L168 Benchmark]: Boogie Preprocessor took 23.73 ms. Allocated memory is still 201.3 MB. Free memory was 177.1 MB in the beginning and 175.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-04-18 07:27:09,384 INFO L168 Benchmark]: RCFGBuilder took 391.61 ms. Allocated memory is still 201.3 MB. Free memory was 175.7 MB in the beginning and 159.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. [2020-04-18 07:27:09,385 INFO L168 Benchmark]: TraceAbstraction took 36406.01 ms. Allocated memory was 201.3 MB in the beginning and 640.7 MB in the end (delta: 439.4 MB). Free memory was 158.9 MB in the beginning and 90.3 MB in the end (delta: 68.6 MB). Peak memory consumption was 508.0 MB. Max. memory is 7.1 GB. [2020-04-18 07:27:09,388 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23 ms. Allocated memory is still 136.8 MB. Free memory was 118.7 MB in the beginning and 118.5 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 357.45 ms. Allocated memory was 136.8 MB in the beginning and 201.3 MB in the end (delta: 64.5 MB). Free memory was 96.6 MB in the beginning and 178.4 MB in the end (delta: -81.8 MB). Peak memory consumption was 22.1 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 35.13 ms. Allocated memory is still 201.3 MB. Free memory was 178.4 MB in the beginning and 177.1 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 23.73 ms. Allocated memory is still 201.3 MB. Free memory was 177.1 MB in the beginning and 175.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 391.61 ms. Allocated memory is still 201.3 MB. Free memory was 175.7 MB in the beginning and 159.6 MB in the end (delta: 16.1 MB). Peak memory consumption was 16.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 36406.01 ms. Allocated memory was 201.3 MB in the beginning and 640.7 MB in the end (delta: 439.4 MB). Free memory was 158.9 MB in the beginning and 90.3 MB in the end (delta: 68.6 MB). Peak memory consumption was 508.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - 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: 36.2s, OverallIterations: 18, TraceHistogramMax: 5, AutomataDifference: 25.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2688 SDtfs, 10560 SDslu, 21510 SDs, 0 SdLazy, 9728 SolverSat, 985 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2471 GetRequests, 1426 SyntacticMatches, 0 SemanticMatches, 1045 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38131 ImplicationChecksByTransitivity, 18.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=7121occurred in iteration=13, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.5s AutomataMinimizationTime, 18 MinimizatonAttempts, 39732 StatesRemovedByMinimization, 16 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 4.4s InterpolantComputationTime, 2436 NumberOfCodeBlocks, 2412 NumberOfCodeBlocksAsserted, 67 NumberOfCheckSat, 2402 ConstructedInterpolants, 0 QuantifiedInterpolants, 627634 SizeOfPredicates, 138 NumberOfNonLiveVariables, 2084 ConjunctsInSsa, 162 ConjunctsInUnsatCore, 34 InterpolantComputations, 3 PerfectInterpolantSequences, 1632/2576 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...