/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/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.oepc.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 23:52:27,329 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 23:52:27,333 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 23:52:27,360 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 23:52:27,360 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 23:52:27,361 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 23:52:27,363 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 23:52:27,365 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 23:52:27,367 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 23:52:27,368 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 23:52:27,369 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 23:52:27,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 23:52:27,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 23:52:27,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 23:52:27,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 23:52:27,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 23:52:27,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 23:52:27,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 23:52:27,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 23:52:27,384 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 23:52:27,386 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 23:52:27,387 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 23:52:27,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 23:52:27,390 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 23:52:27,393 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 23:52:27,393 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 23:52:27,393 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 23:52:27,395 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 23:52:27,395 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 23:52:27,396 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 23:52:27,397 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 23:52:27,398 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 23:52:27,399 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 23:52:27,400 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 23:52:27,401 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 23:52:27,402 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 23:52:27,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 23:52:27,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 23:52:27,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 23:52:27,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 23:52:27,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 23:52:27,406 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-09-11 23:52:27,435 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 23:52:27,435 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 23:52:27,436 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 23:52:27,437 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 23:52:27,437 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 23:52:27,437 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 23:52:27,437 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 23:52:27,438 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 23:52:27,438 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 23:52:27,438 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 23:52:27,438 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 23:52:27,438 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 23:52:27,439 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 23:52:27,439 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 23:52:27,439 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 23:52:27,439 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 23:52:27,439 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 23:52:27,440 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 23:52:27,440 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 23:52:27,440 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 23:52:27,440 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 23:52:27,440 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 23:52:27,441 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 23:52:27,441 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-09-11 23:52:27,441 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 23:52:27,441 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 23:52:27,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 23:52:27,442 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-09-11 23:52:27,442 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-09-11 23:52:27,442 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 23:52:27,442 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-09-11 23:52:27,918 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 23:52:27,942 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 23:52:27,946 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 23:52:27,948 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 23:52:27,949 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 23:52:27,952 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_tso.oepc.i [2020-09-11 23:52:28,056 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/953abccff/24e351df3fda4e37808a059739188cc3/FLAG0f84d5622 [2020-09-11 23:52:28,705 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 23:52:28,706 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread-wmm/safe021_tso.oepc.i [2020-09-11 23:52:28,744 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/953abccff/24e351df3fda4e37808a059739188cc3/FLAG0f84d5622 [2020-09-11 23:52:28,967 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/953abccff/24e351df3fda4e37808a059739188cc3 [2020-09-11 23:52:28,986 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 23:52:28,992 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 23:52:28,994 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 23:52:28,995 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 23:52:28,999 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 23:52:29,000 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 11:52:28" (1/1) ... [2020-09-11 23:52:29,005 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@220e2746 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:52:29, skipping insertion in model container [2020-09-11 23:52:29,006 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 11:52:28" (1/1) ... [2020-09-11 23:52:29,017 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 23:52:29,090 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 23:52:29,586 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 23:52:29,606 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 23:52:29,712 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 23:52:29,826 INFO L208 MainTranslator]: Completed translation [2020-09-11 23:52:29,827 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:52:29 WrapperNode [2020-09-11 23:52:29,827 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 23:52:29,828 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 23:52:29,828 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 23:52:29,829 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 23:52:29,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:52:29" (1/1) ... [2020-09-11 23:52:29,889 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:52:29" (1/1) ... [2020-09-11 23:52:29,927 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 23:52:29,927 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 23:52:29,927 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 23:52:29,928 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 23:52:29,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:52:29" (1/1) ... [2020-09-11 23:52:29,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:52:29" (1/1) ... [2020-09-11 23:52:29,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:52:29" (1/1) ... [2020-09-11 23:52:29,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:52:29" (1/1) ... [2020-09-11 23:52:29,969 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:52:29" (1/1) ... [2020-09-11 23:52:29,977 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:52:29" (1/1) ... [2020-09-11 23:52:29,981 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:52:29" (1/1) ... [2020-09-11 23:52:29,991 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 23:52:29,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 23:52:29,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 23:52:29,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 23:52:29,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:52:29" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 23:52:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 23:52:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 23:52:30,074 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 23:52:30,075 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 23:52:30,075 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2020-09-11 23:52:30,075 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2020-09-11 23:52:30,075 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2020-09-11 23:52:30,075 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2020-09-11 23:52:30,076 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2020-09-11 23:52:30,076 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2020-09-11 23:52:30,076 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 23:52:30,076 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 23:52:30,077 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 23:52:30,079 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 23:52:30,454 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 23:52:30,455 INFO L295 CfgBuilder]: Removed 8 assume(true) statements. [2020-09-11 23:52:30,460 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 11:52:30 BoogieIcfgContainer [2020-09-11 23:52:30,460 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 23:52:30,462 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 23:52:30,462 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 23:52:30,466 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 23:52:30,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 11:52:28" (1/3) ... [2020-09-11 23:52:30,468 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5d720b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 11:52:30, skipping insertion in model container [2020-09-11 23:52:30,468 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 11:52:29" (2/3) ... [2020-09-11 23:52:30,469 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f5d720b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 11:52:30, skipping insertion in model container [2020-09-11 23:52:30,469 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 11:52:30" (3/3) ... [2020-09-11 23:52:30,471 INFO L109 eAbstractionObserver]: Analyzing ICFG safe021_tso.oepc.i [2020-09-11 23:52:30,484 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 23:52:30,484 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-11 23:52:30,495 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 23:52:30,497 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 23:52:30,547 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,548 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,548 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,548 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,549 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,549 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,550 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,550 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,550 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,551 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,551 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,552 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,552 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,552 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,553 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,553 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,553 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,554 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,563 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,564 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,564 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,564 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,571 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,571 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,571 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,572 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,575 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,575 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,575 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,576 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 23:52:30,601 INFO L251 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-09-11 23:52:30,630 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 23:52:30,630 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 23:52:30,631 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-11 23:52:30,631 INFO L378 AbstractCegarLoop]: Backedges is MCR [2020-09-11 23:52:30,631 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 23:52:30,631 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 23:52:30,631 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 23:52:30,632 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 23:52:30,652 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 78 places, 70 transitions, 155 flow [2020-09-11 23:52:30,654 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 70 transitions, 155 flow [2020-09-11 23:52:30,721 INFO L129 PetriNetUnfolder]: 2/67 cut-off events. [2020-09-11 23:52:30,722 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 23:52:30,728 INFO L80 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 67 events. 2/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-09-11 23:52:30,731 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 78 places, 70 transitions, 155 flow [2020-09-11 23:52:30,756 INFO L129 PetriNetUnfolder]: 2/67 cut-off events. [2020-09-11 23:52:30,756 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 23:52:30,757 INFO L80 FinitePrefix]: Finished finitePrefix Result has 77 conditions, 67 events. 2/67 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 46 event pairs, 0 based on Foata normal form. 0/64 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2020-09-11 23:52:30,763 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 1260 [2020-09-11 23:52:30,767 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-09-11 23:52:32,087 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2020-09-11 23:52:32,172 INFO L206 etLargeBlockEncoding]: Checked pairs total: 2250 [2020-09-11 23:52:32,172 INFO L214 etLargeBlockEncoding]: Total number of compositions: 55 [2020-09-11 23:52:32,177 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 32 places, 23 transitions, 61 flow [2020-09-11 23:52:32,209 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 362 states. [2020-09-11 23:52:32,211 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states. [2020-09-11 23:52:32,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 23:52:32,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:52:32,223 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:52:32,223 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:52:32,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:52:32,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1626400852, now seen corresponding path program 1 times [2020-09-11 23:52:32,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:52:32,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161993489] [2020-09-11 23:52:32,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:52:32,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:52:32,455 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:52:32,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161993489] [2020-09-11 23:52:32,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:52:32,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 23:52:32,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [798219405] [2020-09-11 23:52:32,460 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:52:32,464 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:52:32,482 INFO L274 McrAutomatonBuilder]: Finished intersection with 9 states and 8 transitions. [2020-09-11 23:52:32,482 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:52:32,484 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 23:52:32,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-11 23:52:32,486 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:52:32,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-11 23:52:32,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-11 23:52:32,508 INFO L87 Difference]: Start difference. First operand 362 states. Second operand 2 states. [2020-09-11 23:52:32,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:52:32,542 INFO L93 Difference]: Finished difference Result 362 states and 1072 transitions. [2020-09-11 23:52:32,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-11 23:52:32,544 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 8 [2020-09-11 23:52:32,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:52:32,571 INFO L225 Difference]: With dead ends: 362 [2020-09-11 23:52:32,571 INFO L226 Difference]: Without dead ends: 298 [2020-09-11 23:52:32,573 INFO L675 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 [2020-09-11 23:52:32,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-09-11 23:52:32,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2020-09-11 23:52:32,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 298 states. [2020-09-11 23:52:32,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 864 transitions. [2020-09-11 23:52:32,658 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 864 transitions. Word has length 8 [2020-09-11 23:52:32,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:52:32,660 INFO L479 AbstractCegarLoop]: Abstraction has 298 states and 864 transitions. [2020-09-11 23:52:32,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-11 23:52:32,660 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 864 transitions. [2020-09-11 23:52:32,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-09-11 23:52:32,662 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:52:32,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:52:32,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 23:52:32,663 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:52:32,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:52:32,663 INFO L82 PathProgramCache]: Analyzing trace with hash -1121187596, now seen corresponding path program 1 times [2020-09-11 23:52:32,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:52:32,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822653582] [2020-09-11 23:52:32,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:52:32,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:52:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:52:32,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822653582] [2020-09-11 23:52:32,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:52:32,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 23:52:32,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1716620514] [2020-09-11 23:52:32,856 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:52:32,857 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:52:32,858 INFO L274 McrAutomatonBuilder]: Finished intersection with 10 states and 9 transitions. [2020-09-11 23:52:32,859 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:52:32,859 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 23:52:32,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 23:52:32,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:52:32,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 23:52:32,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 23:52:32,862 INFO L87 Difference]: Start difference. First operand 298 states and 864 transitions. Second operand 4 states. [2020-09-11 23:52:32,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:52:32,904 INFO L93 Difference]: Finished difference Result 346 states and 956 transitions. [2020-09-11 23:52:32,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 23:52:32,905 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 9 [2020-09-11 23:52:32,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:52:32,909 INFO L225 Difference]: With dead ends: 346 [2020-09-11 23:52:32,909 INFO L226 Difference]: Without dead ends: 282 [2020-09-11 23:52:32,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 23:52:32,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-09-11 23:52:32,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 282. [2020-09-11 23:52:32,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-09-11 23:52:32,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 804 transitions. [2020-09-11 23:52:32,936 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 804 transitions. Word has length 9 [2020-09-11 23:52:32,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:52:32,936 INFO L479 AbstractCegarLoop]: Abstraction has 282 states and 804 transitions. [2020-09-11 23:52:32,936 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 23:52:32,936 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 804 transitions. [2020-09-11 23:52:32,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 23:52:32,938 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:52:32,938 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:52:32,938 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 23:52:32,939 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:52:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:52:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash -485254353, now seen corresponding path program 1 times [2020-09-11 23:52:32,939 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:52:32,940 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522062082] [2020-09-11 23:52:32,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:52:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:52:33,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:52:33,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522062082] [2020-09-11 23:52:33,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:52:33,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 23:52:33,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [876213279] [2020-09-11 23:52:33,071 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:52:33,072 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:52:33,074 INFO L274 McrAutomatonBuilder]: Finished intersection with 14 states and 16 transitions. [2020-09-11 23:52:33,074 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:52:33,107 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 23:52:33,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 23:52:33,108 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:52:33,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 23:52:33,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 23:52:33,109 INFO L87 Difference]: Start difference. First operand 282 states and 804 transitions. Second operand 4 states. [2020-09-11 23:52:33,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:52:33,140 INFO L93 Difference]: Finished difference Result 310 states and 844 transitions. [2020-09-11 23:52:33,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 23:52:33,141 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-09-11 23:52:33,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:52:33,144 INFO L225 Difference]: With dead ends: 310 [2020-09-11 23:52:33,144 INFO L226 Difference]: Without dead ends: 254 [2020-09-11 23:52:33,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 23:52:33,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-09-11 23:52:33,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 254. [2020-09-11 23:52:33,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-09-11 23:52:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 708 transitions. [2020-09-11 23:52:33,162 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 708 transitions. Word has length 10 [2020-09-11 23:52:33,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:52:33,163 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 708 transitions. [2020-09-11 23:52:33,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 23:52:33,163 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 708 transitions. [2020-09-11 23:52:33,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 23:52:33,164 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:52:33,165 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:52:33,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 23:52:33,165 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:52:33,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:52:33,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2136362745, now seen corresponding path program 1 times [2020-09-11 23:52:33,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:52:33,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35253416] [2020-09-11 23:52:33,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:52:33,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:52:33,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:52:33,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35253416] [2020-09-11 23:52:33,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:52:33,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 23:52:33,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [887192481] [2020-09-11 23:52:33,283 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:52:33,285 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:52:33,286 INFO L274 McrAutomatonBuilder]: Finished intersection with 18 states and 24 transitions. [2020-09-11 23:52:33,287 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:52:33,348 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 23:52:33,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 23:52:33,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:52:33,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 23:52:33,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-11 23:52:33,349 INFO L87 Difference]: Start difference. First operand 254 states and 708 transitions. Second operand 5 states. [2020-09-11 23:52:33,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:52:33,396 INFO L93 Difference]: Finished difference Result 308 states and 834 transitions. [2020-09-11 23:52:33,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-11 23:52:33,397 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 11 [2020-09-11 23:52:33,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:52:33,399 INFO L225 Difference]: With dead ends: 308 [2020-09-11 23:52:33,399 INFO L226 Difference]: Without dead ends: 170 [2020-09-11 23:52:33,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-09-11 23:52:33,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-09-11 23:52:33,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2020-09-11 23:52:33,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-09-11 23:52:33,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 432 transitions. [2020-09-11 23:52:33,409 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 432 transitions. Word has length 11 [2020-09-11 23:52:33,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:52:33,410 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 432 transitions. [2020-09-11 23:52:33,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 23:52:33,410 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 432 transitions. [2020-09-11 23:52:33,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 23:52:33,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:52:33,412 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:52:33,412 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 23:52:33,412 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:52:33,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:52:33,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1820296279, now seen corresponding path program 1 times [2020-09-11 23:52:33,413 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:52:33,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414520240] [2020-09-11 23:52:33,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:52:33,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:52:33,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:52:33,486 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414520240] [2020-09-11 23:52:33,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:52:33,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 23:52:33,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [560738072] [2020-09-11 23:52:33,487 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:52:33,489 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:52:33,491 INFO L274 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-09-11 23:52:33,491 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:52:33,525 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-09-11 23:52:33,555 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-09-11 23:52:33,584 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 4 conjuncts [2020-09-11 23:52:33,599 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4168#(not (= 3 ~__unbuffered_cnt~0))] [2020-09-11 23:52:33,599 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 23:52:33,600 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:52:33,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 23:52:33,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-11 23:52:33,600 INFO L87 Difference]: Start difference. First operand 170 states and 432 transitions. Second operand 5 states. [2020-09-11 23:52:33,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:52:33,664 INFO L93 Difference]: Finished difference Result 144 states and 325 transitions. [2020-09-11 23:52:33,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 23:52:33,665 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 12 [2020-09-11 23:52:33,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:52:33,666 INFO L225 Difference]: With dead ends: 144 [2020-09-11 23:52:33,666 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 23:52:33,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-11 23:52:33,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 23:52:33,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2020-09-11 23:52:33,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-11 23:52:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 215 transitions. [2020-09-11 23:52:33,671 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 215 transitions. Word has length 12 [2020-09-11 23:52:33,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:52:33,672 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 215 transitions. [2020-09-11 23:52:33,672 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 23:52:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 215 transitions. [2020-09-11 23:52:33,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 23:52:33,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:52:33,674 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:52:33,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-11 23:52:33,674 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:52:33,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:52:33,675 INFO L82 PathProgramCache]: Analyzing trace with hash 1420096236, now seen corresponding path program 1 times [2020-09-11 23:52:33,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:52:33,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010785308] [2020-09-11 23:52:33,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:52:33,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:52:33,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:52:33,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010785308] [2020-09-11 23:52:33,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:52:33,749 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-11 23:52:33,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1931245345] [2020-09-11 23:52:33,750 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:52:33,752 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:52:33,769 INFO L274 McrAutomatonBuilder]: Finished intersection with 20 states and 23 transitions. [2020-09-11 23:52:33,769 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:52:33,788 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 23:52:33,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 23:52:33,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:52:33,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 23:52:33,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-11 23:52:33,789 INFO L87 Difference]: Start difference. First operand 104 states and 215 transitions. Second operand 6 states. [2020-09-11 23:52:33,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:52:33,849 INFO L93 Difference]: Finished difference Result 93 states and 191 transitions. [2020-09-11 23:52:33,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 23:52:33,850 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 15 [2020-09-11 23:52:33,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:52:33,851 INFO L225 Difference]: With dead ends: 93 [2020-09-11 23:52:33,851 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 23:52:33,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-09-11 23:52:33,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 23:52:33,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-09-11 23:52:33,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-11 23:52:33,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 177 transitions. [2020-09-11 23:52:33,857 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 177 transitions. Word has length 15 [2020-09-11 23:52:33,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:52:33,857 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 177 transitions. [2020-09-11 23:52:33,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 23:52:33,857 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 177 transitions. [2020-09-11 23:52:33,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 23:52:33,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:52:33,859 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:52:33,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-11 23:52:33,859 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:52:33,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:52:33,859 INFO L82 PathProgramCache]: Analyzing trace with hash -572692364, now seen corresponding path program 1 times [2020-09-11 23:52:33,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:52:33,860 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531407700] [2020-09-11 23:52:33,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:52:33,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:52:33,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:52:33,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531407700] [2020-09-11 23:52:33,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:52:33,923 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 23:52:33,923 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1977601244] [2020-09-11 23:52:33,923 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:52:33,926 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:52:33,930 INFO L274 McrAutomatonBuilder]: Finished intersection with 27 states and 34 transitions. [2020-09-11 23:52:33,930 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:52:33,946 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 23:52:33,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 23:52:33,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:52:33,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 23:52:33,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 23:52:33,947 INFO L87 Difference]: Start difference. First operand 85 states and 177 transitions. Second operand 4 states. [2020-09-11 23:52:33,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:52:33,966 INFO L93 Difference]: Finished difference Result 117 states and 236 transitions. [2020-09-11 23:52:33,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-11 23:52:33,966 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 18 [2020-09-11 23:52:33,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:52:33,967 INFO L225 Difference]: With dead ends: 117 [2020-09-11 23:52:33,967 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 23:52:33,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 23:52:33,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 23:52:33,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-09-11 23:52:33,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 23:52:33,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 99 transitions. [2020-09-11 23:52:33,971 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 99 transitions. Word has length 18 [2020-09-11 23:52:33,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:52:33,971 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 99 transitions. [2020-09-11 23:52:33,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 23:52:33,972 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 99 transitions. [2020-09-11 23:52:33,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 23:52:33,972 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 23:52:33,973 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 23:52:33,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-11 23:52:33,973 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 23:52:33,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 23:52:33,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1123595488, now seen corresponding path program 2 times [2020-09-11 23:52:33,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 23:52:33,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841184263] [2020-09-11 23:52:33,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 23:52:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 23:52:34,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 23:52:34,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841184263] [2020-09-11 23:52:34,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 23:52:34,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 23:52:34,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [606922392] [2020-09-11 23:52:34,056 INFO L216 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-09-11 23:52:34,058 INFO L271 McrAutomatonBuilder]: Started intersection. [2020-09-11 23:52:34,067 INFO L274 McrAutomatonBuilder]: Finished intersection with 58 states and 100 transitions. [2020-09-11 23:52:34,067 INFO L299 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton. [2020-09-11 23:52:34,296 INFO L399 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-09-11 23:52:34,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 23:52:34,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 23:52:34,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 23:52:34,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-11 23:52:34,297 INFO L87 Difference]: Start difference. First operand 55 states and 99 transitions. Second operand 5 states. [2020-09-11 23:52:34,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 23:52:34,320 INFO L93 Difference]: Finished difference Result 54 states and 98 transitions. [2020-09-11 23:52:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 23:52:34,320 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-09-11 23:52:34,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 23:52:34,321 INFO L225 Difference]: With dead ends: 54 [2020-09-11 23:52:34,321 INFO L226 Difference]: Without dead ends: 0 [2020-09-11 23:52:34,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-11 23:52:34,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-11 23:52:34,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-11 23:52:34,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-11 23:52:34,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-11 23:52:34,322 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2020-09-11 23:52:34,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 23:52:34,322 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-11 23:52:34,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 23:52:34,323 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-11 23:52:34,323 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-11 23:52:34,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-11 23:52:34,328 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 11:52:34 BasicIcfg [2020-09-11 23:52:34,328 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 23:52:34,331 INFO L168 Benchmark]: Toolchain (without parser) took 5342.59 ms. Allocated memory was 140.5 MB in the beginning and 247.5 MB in the end (delta: 107.0 MB). Free memory was 102.4 MB in the beginning and 135.8 MB in the end (delta: -33.5 MB). Peak memory consumption was 73.5 MB. Max. memory is 7.1 GB. [2020-09-11 23:52:34,332 INFO L168 Benchmark]: CDTParser took 0.27 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-11 23:52:34,333 INFO L168 Benchmark]: CACSL2BoogieTranslator took 833.47 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 101.7 MB in the beginning and 160.5 MB in the end (delta: -58.7 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. [2020-09-11 23:52:34,334 INFO L168 Benchmark]: Boogie Procedure Inliner took 98.76 ms. Allocated memory is still 202.9 MB. Free memory was 160.5 MB in the beginning and 158.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. [2020-09-11 23:52:34,334 INFO L168 Benchmark]: Boogie Preprocessor took 63.92 ms. Allocated memory is still 202.9 MB. Free memory was 158.5 MB in the beginning and 157.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-11 23:52:34,335 INFO L168 Benchmark]: RCFGBuilder took 469.10 ms. Allocated memory is still 202.9 MB. Free memory was 157.2 MB in the beginning and 134.9 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. [2020-09-11 23:52:34,336 INFO L168 Benchmark]: TraceAbstraction took 3865.98 ms. Allocated memory was 202.9 MB in the beginning and 247.5 MB in the end (delta: 44.6 MB). Free memory was 134.2 MB in the beginning and 135.8 MB in the end (delta: -1.6 MB). Peak memory consumption was 43.0 MB. Max. memory is 7.1 GB. [2020-09-11 23:52:34,341 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.27 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 MB in the beginning and 121.8 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 833.47 ms. Allocated memory was 140.5 MB in the beginning and 202.9 MB in the end (delta: 62.4 MB). Free memory was 101.7 MB in the beginning and 160.5 MB in the end (delta: -58.7 MB). Peak memory consumption was 26.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 98.76 ms. Allocated memory is still 202.9 MB. Free memory was 160.5 MB in the beginning and 158.5 MB in the end (delta: 1.9 MB). Peak memory consumption was 1.9 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 63.92 ms. Allocated memory is still 202.9 MB. Free memory was 158.5 MB in the beginning and 157.2 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 469.10 ms. Allocated memory is still 202.9 MB. Free memory was 157.2 MB in the beginning and 134.9 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3865.98 ms. Allocated memory was 202.9 MB in the beginning and 247.5 MB in the end (delta: 44.6 MB). Free memory was 134.2 MB in the beginning and 135.8 MB in the end (delta: -1.6 MB). Peak memory consumption was 43.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.5s, 78 ProgramPointsBefore, 32 ProgramPointsAfterwards, 70 TransitionsBefore, 23 TransitionsAfterwards, 1260 CoEnabledTransitionPairs, 6 FixpointIterations, 14 TrivialSequentialCompositions, 35 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 6 ConcurrentYvCompositions, 1 ChoiceCompositions, 635 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 2250 CheckedPairsTotal, 55 TotalNumberOfCompositions - PositiveResult [Line: 7]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 69 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.6s, OverallIterations: 8, TraceHistogramMax: 1, AutomataDifference: 0.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 181 SDtfs, 159 SDslu, 271 SDs, 0 SdLazy, 92 SolverSat, 21 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 138 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=362occurred in iteration=0, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 101 NumberOfCodeBlocks, 101 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 93 ConstructedInterpolants, 0 QuantifiedInterpolants, 2834 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 8 InterpolantComputations, 8 PerfectInterpolantSequences, 0/0 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...