/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -i ../../../trunk/examples/svcomp/pthread-wmm/safe028_tso.opt.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 20:28:35,583 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 20:28:35,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 20:28:35,627 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 20:28:35,628 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 20:28:35,628 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 20:28:35,629 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 20:28:35,630 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 20:28:35,631 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 20:28:35,632 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 20:28:35,632 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 20:28:35,633 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 20:28:35,633 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 20:28:35,634 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 20:28:35,634 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 20:28:35,635 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 20:28:35,636 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 20:28:35,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 20:28:35,637 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 20:28:35,638 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 20:28:35,639 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 20:28:35,640 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 20:28:35,641 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 20:28:35,641 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 20:28:35,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-03-11 20:28:35,643 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-03-11 20:28:35,643 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-03-11 20:28:35,735 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-03-11 20:28:35,736 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-03-11 20:28:35,736 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-03-11 20:28:35,736 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 20:28:35,737 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 20:28:35,738 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 20:28:35,739 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 20:28:35,740 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 20:28:35,740 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 20:28:35,742 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 20:28:35,742 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 20:28:35,742 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 20:28:35,742 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 20:28:35,743 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 20:28:35,744 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-PN-SemanticLbe.epf [2021-03-11 20:28:35,769 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 20:28:35,769 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 20:28:35,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 20:28:35,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 20:28:35,770 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 20:28:35,770 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 20:28:35,770 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 20:28:35,770 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 20:28:35,770 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 20:28:35,770 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 20:28:35,770 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 20:28:35,771 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 20:28:35,771 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 20:28:35,771 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 20:28:35,771 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 20:28:35,771 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 20:28:35,771 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 20:28:35,771 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 20:28:35,771 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 20:28:35,771 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 20:28:35,771 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 20:28:35,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 20:28:35,772 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 20:28:35,772 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 20:28:35,772 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 20:28:35,772 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 20:28:35,772 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 20:28:35,772 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 20:28:35,772 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 20:28:36,023 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 20:28:36,049 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 20:28:36,051 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 20:28:36,052 INFO L271 PluginConnector]: Initializing CDTParser... [2021-03-11 20:28:36,053 INFO L275 PluginConnector]: CDTParser initialized [2021-03-11 20:28:36,053 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe028_tso.opt.i [2021-03-11 20:28:36,098 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c40845b1/43395742603642ac8c875d5fa228ce9c/FLAG2b5a2a953 [2021-03-11 20:28:36,647 INFO L306 CDTParser]: Found 1 translation units. [2021-03-11 20:28:36,648 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_tso.opt.i [2021-03-11 20:28:36,659 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c40845b1/43395742603642ac8c875d5fa228ce9c/FLAG2b5a2a953 [2021-03-11 20:28:37,130 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3c40845b1/43395742603642ac8c875d5fa228ce9c [2021-03-11 20:28:37,132 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 20:28:37,136 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2021-03-11 20:28:37,137 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-03-11 20:28:37,137 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-03-11 20:28:37,140 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-03-11 20:28:37,140 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:28:37" (1/1) ... [2021-03-11 20:28:37,141 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a38f761 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:28:37, skipping insertion in model container [2021-03-11 20:28:37,141 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.03 08:28:37" (1/1) ... [2021-03-11 20:28:37,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-03-11 20:28:37,173 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-03-11 20:28:37,263 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_tso.opt.i[949,962] [2021-03-11 20:28:37,415 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:28:37,421 INFO L203 MainTranslator]: Completed pre-run [2021-03-11 20:28:37,429 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe028_tso.opt.i[949,962] [2021-03-11 20:28:37,453 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-03-11 20:28:37,500 INFO L208 MainTranslator]: Completed translation [2021-03-11 20:28:37,500 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:28:37 WrapperNode [2021-03-11 20:28:37,500 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-03-11 20:28:37,501 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 20:28:37,501 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 20:28:37,502 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 20:28:37,507 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:28:37" (1/1) ... [2021-03-11 20:28:37,519 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:28:37" (1/1) ... [2021-03-11 20:28:37,535 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 20:28:37,536 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 20:28:37,536 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 20:28:37,536 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 20:28:37,541 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:28:37" (1/1) ... [2021-03-11 20:28:37,541 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:28:37" (1/1) ... [2021-03-11 20:28:37,558 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:28:37" (1/1) ... [2021-03-11 20:28:37,558 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:28:37" (1/1) ... [2021-03-11 20:28:37,561 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:28:37" (1/1) ... [2021-03-11 20:28:37,562 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:28:37" (1/1) ... [2021-03-11 20:28:37,563 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:28:37" (1/1) ... [2021-03-11 20:28:37,565 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 20:28:37,566 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 20:28:37,566 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 20:28:37,566 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 20:28:37,566 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:28:37" (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 [2021-03-11 20:28:37,631 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-03-11 20:28:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-03-11 20:28:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-03-11 20:28:37,632 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-03-11 20:28:37,633 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2021-03-11 20:28:37,633 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2021-03-11 20:28:37,633 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2021-03-11 20:28:37,633 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2021-03-11 20:28:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2021-03-11 20:28:37,634 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2021-03-11 20:28:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-03-11 20:28:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-03-11 20:28:37,634 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 20:28:37,634 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 20:28:37,635 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 20:28:37,940 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 20:28:37,940 INFO L299 CfgBuilder]: Removed 8 assume(true) statements. [2021-03-11 20:28:37,943 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:28:37 BoogieIcfgContainer [2021-03-11 20:28:37,943 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 20:28:37,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 20:28:37,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 20:28:37,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 20:28:37,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.03 08:28:37" (1/3) ... [2021-03-11 20:28:37,947 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0c74d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:28:37, skipping insertion in model container [2021-03-11 20:28:37,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.03 08:28:37" (2/3) ... [2021-03-11 20:28:37,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@d0c74d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 08:28:37, skipping insertion in model container [2021-03-11 20:28:37,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 08:28:37" (3/3) ... [2021-03-11 20:28:37,949 INFO L111 eAbstractionObserver]: Analyzing ICFG safe028_tso.opt.i [2021-03-11 20:28:37,953 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 20:28:37,957 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 20:28:37,957 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 20:28:37,984 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,984 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,984 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,985 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,985 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,985 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,985 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,985 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,985 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,985 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,986 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,986 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,986 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,987 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,987 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,987 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,987 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,987 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,987 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,987 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,987 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,988 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,988 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,988 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,988 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,989 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,989 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,989 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,990 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,990 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,990 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,990 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,991 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,991 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,991 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,992 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,993 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,995 WARN L313 ript$VariableManager]: TermVariabe |P0Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,996 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,996 WARN L313 ript$VariableManager]: TermVariabe P0Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,999 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:37,999 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:38,000 WARN L313 ript$VariableManager]: TermVariabe P1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:38,000 WARN L313 ript$VariableManager]: TermVariabe |P1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:38,001 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:38,002 WARN L313 ript$VariableManager]: TermVariabe P2Thread1of1ForFork2_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:38,002 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:38,002 WARN L313 ript$VariableManager]: TermVariabe |P2Thread1of1ForFork2_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 20:28:38,006 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 20:28:38,019 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 20:28:38,045 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 20:28:38,045 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 20:28:38,045 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 20:28:38,045 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 20:28:38,046 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 20:28:38,046 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 20:28:38,046 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 20:28:38,046 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 20:28:38,055 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 82 places, 74 transitions, 163 flow [2021-03-11 20:28:38,094 INFO L129 PetriNetUnfolder]: 2/71 cut-off events. [2021-03-11 20:28:38,094 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:28:38,098 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 71 events. 2/71 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 48 event pairs, 0 based on Foata normal form. 0/68 useless extension candidates. Maximal degree in co-relation 55. Up to 2 conditions per place. [2021-03-11 20:28:38,099 INFO L82 GeneralOperation]: Start removeDead. Operand has 82 places, 74 transitions, 163 flow [2021-03-11 20:28:38,102 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 59 transitions, 127 flow [2021-03-11 20:28:38,104 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-11 20:28:38,110 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 68 places, 59 transitions, 127 flow [2021-03-11 20:28:38,112 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 68 places, 59 transitions, 127 flow [2021-03-11 20:28:38,112 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 68 places, 59 transitions, 127 flow [2021-03-11 20:28:38,135 INFO L129 PetriNetUnfolder]: 1/59 cut-off events. [2021-03-11 20:28:38,135 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:28:38,135 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 59 events. 1/59 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 42 event pairs, 0 based on Foata normal form. 0/58 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2021-03-11 20:28:38,137 INFO L116 LiptonReduction]: Number of co-enabled transitions 804 [2021-03-11 20:28:39,705 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-03-11 20:28:39,862 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 76 [2021-03-11 20:28:39,971 INFO L131 LiptonReduction]: Checked pairs total: 1419 [2021-03-11 20:28:39,972 INFO L133 LiptonReduction]: Total number of compositions: 46 [2021-03-11 20:28:39,973 INFO L182 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 1871 [2021-03-11 20:28:39,986 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-11 20:28:39,986 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:28:39,986 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:28:39,986 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:28:39,987 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:28:39,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:28:39,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1477388787, now seen corresponding path program 1 times [2021-03-11 20:28:39,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:28:39,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555582246] [2021-03-11 20:28:39,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:28:40,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:28:40,202 INFO L142 QuantifierPusher]: treesize reduction 3, result has 81.3 percent of original size [2021-03-11 20:28:40,203 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-03-11 20:28:40,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:28:40,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555582246] [2021-03-11 20:28:40,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:28:40,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 20:28:40,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680834151] [2021-03-11 20:28:40,216 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 20:28:40,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:28:40,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 20:28:40,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 20:28:40,226 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 97 out of 120 [2021-03-11 20:28:40,227 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 16 transitions, 41 flow. Second operand has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,227 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:28:40,228 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 97 of 120 [2021-03-11 20:28:40,228 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:28:40,244 INFO L129 PetriNetUnfolder]: 7/32 cut-off events. [2021-03-11 20:28:40,244 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 20:28:40,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 61 conditions, 32 events. 7/32 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 61 event pairs, 3 based on Foata normal form. 1/33 useless extension candidates. Maximal degree in co-relation 51. Up to 18 conditions per place. [2021-03-11 20:28:40,245 INFO L132 encePairwiseOnDemand]: 116/120 looper letters, 4 selfloop transitions, 3 changer transitions 0/18 dead transitions. [2021-03-11 20:28:40,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 28 places, 18 transitions, 59 flow [2021-03-11 20:28:40,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 20:28:40,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 20:28:40,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 299 transitions. [2021-03-11 20:28:40,253 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8305555555555556 [2021-03-11 20:28:40,254 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 299 transitions. [2021-03-11 20:28:40,254 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 299 transitions. [2021-03-11 20:28:40,255 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:28:40,256 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 299 transitions. [2021-03-11 20:28:40,258 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 99.66666666666667) internal successors, (299), 3 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,261 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,262 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 120.0) internal successors, (480), 4 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,263 INFO L185 Difference]: Start difference. First operand has 26 places, 16 transitions, 41 flow. Second operand 3 states and 299 transitions. [2021-03-11 20:28:40,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 28 places, 18 transitions, 59 flow [2021-03-11 20:28:40,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 18 transitions, 56 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-11 20:28:40,266 INFO L241 Difference]: Finished difference. Result has 26 places, 18 transitions, 57 flow [2021-03-11 20:28:40,267 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=38, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=57, PETRI_PLACES=26, PETRI_TRANSITIONS=18} [2021-03-11 20:28:40,267 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 0 predicate places. [2021-03-11 20:28:40,268 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 18 transitions, 57 flow [2021-03-11 20:28:40,268 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 97.66666666666667) internal successors, (293), 3 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,268 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:28:40,268 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:28:40,268 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 20:28:40,268 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:28:40,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:28:40,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1445587181, now seen corresponding path program 1 times [2021-03-11 20:28:40,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:28:40,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609480591] [2021-03-11 20:28:40,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:28:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:28:40,337 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:28:40,338 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:28:40,340 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:28:40,340 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:28:40,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:28:40,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609480591] [2021-03-11 20:28:40,343 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:28:40,343 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:28:40,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898250009] [2021-03-11 20:28:40,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:28:40,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:28:40,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:28:40,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:28:40,347 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 94 out of 120 [2021-03-11 20:28:40,347 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 18 transitions, 57 flow. Second operand has 4 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,347 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:28:40,347 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 94 of 120 [2021-03-11 20:28:40,347 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:28:40,373 INFO L129 PetriNetUnfolder]: 5/37 cut-off events. [2021-03-11 20:28:40,373 INFO L130 PetriNetUnfolder]: For 12/22 co-relation queries the response was YES. [2021-03-11 20:28:40,374 INFO L84 FinitePrefix]: Finished finitePrefix Result has 81 conditions, 37 events. 5/37 cut-off events. For 12/22 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 96 event pairs, 0 based on Foata normal form. 6/43 useless extension candidates. Maximal degree in co-relation 71. Up to 13 conditions per place. [2021-03-11 20:28:40,375 INFO L132 encePairwiseOnDemand]: 116/120 looper letters, 4 selfloop transitions, 4 changer transitions 4/23 dead transitions. [2021-03-11 20:28:40,375 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 23 transitions, 103 flow [2021-03-11 20:28:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:28:40,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:28:40,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 386 transitions. [2021-03-11 20:28:40,379 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8041666666666667 [2021-03-11 20:28:40,380 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 386 transitions. [2021-03-11 20:28:40,380 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 386 transitions. [2021-03-11 20:28:40,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:28:40,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 386 transitions. [2021-03-11 20:28:40,382 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.5) internal successors, (386), 4 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,384 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,385 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,385 INFO L185 Difference]: Start difference. First operand has 26 places, 18 transitions, 57 flow. Second operand 4 states and 386 transitions. [2021-03-11 20:28:40,385 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 23 transitions, 103 flow [2021-03-11 20:28:40,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 23 transitions, 98 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:28:40,386 INFO L241 Difference]: Finished difference. Result has 30 places, 18 transitions, 71 flow [2021-03-11 20:28:40,386 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=54, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=71, PETRI_PLACES=30, PETRI_TRANSITIONS=18} [2021-03-11 20:28:40,386 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 4 predicate places. [2021-03-11 20:28:40,386 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 18 transitions, 71 flow [2021-03-11 20:28:40,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 94.75) internal successors, (379), 4 states have internal predecessors, (379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,387 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:28:40,387 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:28:40,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 20:28:40,387 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:28:40,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:28:40,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1175177972, now seen corresponding path program 1 times [2021-03-11 20:28:40,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:28:40,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334238641] [2021-03-11 20:28:40,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:28:40,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:28:40,459 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:28:40,460 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:28:40,461 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:28:40,462 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:28:40,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:28:40,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334238641] [2021-03-11 20:28:40,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:28:40,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-03-11 20:28:40,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099162140] [2021-03-11 20:28:40,465 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:28:40,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:28:40,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:28:40,466 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:28:40,467 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 120 [2021-03-11 20:28:40,468 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 18 transitions, 71 flow. Second operand has 4 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,468 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:28:40,468 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 120 [2021-03-11 20:28:40,468 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:28:40,503 INFO L129 PetriNetUnfolder]: 38/89 cut-off events. [2021-03-11 20:28:40,503 INFO L130 PetriNetUnfolder]: For 119/143 co-relation queries the response was YES. [2021-03-11 20:28:40,503 INFO L84 FinitePrefix]: Finished finitePrefix Result has 219 conditions, 89 events. 38/89 cut-off events. For 119/143 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 309 event pairs, 6 based on Foata normal form. 14/94 useless extension candidates. Maximal degree in co-relation 206. Up to 42 conditions per place. [2021-03-11 20:28:40,504 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 8 selfloop transitions, 5 changer transitions 0/25 dead transitions. [2021-03-11 20:28:40,504 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 25 transitions, 111 flow [2021-03-11 20:28:40,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:28:40,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:28:40,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 371 transitions. [2021-03-11 20:28:40,505 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7729166666666667 [2021-03-11 20:28:40,505 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 371 transitions. [2021-03-11 20:28:40,505 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 371 transitions. [2021-03-11 20:28:40,506 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:28:40,506 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 371 transitions. [2021-03-11 20:28:40,506 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,507 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,508 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,508 INFO L185 Difference]: Start difference. First operand has 30 places, 18 transitions, 71 flow. Second operand 4 states and 371 transitions. [2021-03-11 20:28:40,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 25 transitions, 111 flow [2021-03-11 20:28:40,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 25 transitions, 106 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 20:28:40,509 INFO L241 Difference]: Finished difference. Result has 33 places, 22 transitions, 104 flow [2021-03-11 20:28:40,510 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=104, PETRI_PLACES=33, PETRI_TRANSITIONS=22} [2021-03-11 20:28:40,511 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2021-03-11 20:28:40,512 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 22 transitions, 104 flow [2021-03-11 20:28:40,512 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 89.75) internal successors, (359), 4 states have internal predecessors, (359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,512 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:28:40,516 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:28:40,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 20:28:40,516 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:28:40,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:28:40,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2070798112, now seen corresponding path program 1 times [2021-03-11 20:28:40,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:28:40,517 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366210536] [2021-03-11 20:28:40,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:28:40,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:28:40,567 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:28:40,568 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:28:40,571 INFO L142 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 20:28:40,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-03-11 20:28:40,574 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:28:40,575 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:28:40,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:28:40,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366210536] [2021-03-11 20:28:40,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:28:40,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:28:40,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884416000] [2021-03-11 20:28:40,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 20:28:40,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:28:40,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 20:28:40,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-11 20:28:40,579 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 120 [2021-03-11 20:28:40,580 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 22 transitions, 104 flow. Second operand has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,580 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:28:40,580 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 120 [2021-03-11 20:28:40,580 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:28:40,616 INFO L129 PetriNetUnfolder]: 26/77 cut-off events. [2021-03-11 20:28:40,616 INFO L130 PetriNetUnfolder]: For 185/331 co-relation queries the response was YES. [2021-03-11 20:28:40,618 INFO L84 FinitePrefix]: Finished finitePrefix Result has 264 conditions, 77 events. 26/77 cut-off events. For 185/331 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 287 event pairs, 0 based on Foata normal form. 21/88 useless extension candidates. Maximal degree in co-relation 249. Up to 53 conditions per place. [2021-03-11 20:28:40,619 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 9 selfloop transitions, 8 changer transitions 0/29 dead transitions. [2021-03-11 20:28:40,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 29 transitions, 167 flow [2021-03-11 20:28:40,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 20:28:40,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 20:28:40,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 464 transitions. [2021-03-11 20:28:40,620 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7733333333333333 [2021-03-11 20:28:40,620 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 464 transitions. [2021-03-11 20:28:40,620 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 464 transitions. [2021-03-11 20:28:40,620 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:28:40,620 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 464 transitions. [2021-03-11 20:28:40,621 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 92.8) internal successors, (464), 5 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,623 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 120.0) internal successors, (720), 6 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,623 INFO L185 Difference]: Start difference. First operand has 33 places, 22 transitions, 104 flow. Second operand 5 states and 464 transitions. [2021-03-11 20:28:40,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 29 transitions, 167 flow [2021-03-11 20:28:40,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 29 transitions, 164 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 20:28:40,625 INFO L241 Difference]: Finished difference. Result has 38 places, 26 transitions, 156 flow [2021-03-11 20:28:40,625 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=156, PETRI_PLACES=38, PETRI_TRANSITIONS=26} [2021-03-11 20:28:40,625 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 12 predicate places. [2021-03-11 20:28:40,625 INFO L480 AbstractCegarLoop]: Abstraction has has 38 places, 26 transitions, 156 flow [2021-03-11 20:28:40,626 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 89.8) internal successors, (449), 5 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,626 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:28:40,626 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:28:40,626 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 20:28:40,626 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:28:40,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:28:40,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1039635838, now seen corresponding path program 1 times [2021-03-11 20:28:40,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:28:40,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107710375] [2021-03-11 20:28:40,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:28:40,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:28:40,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:28:40,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:28:40,668 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:28:40,668 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:28:40,670 INFO L142 QuantifierPusher]: treesize reduction 4, result has 50.0 percent of original size [2021-03-11 20:28:40,671 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 4 [2021-03-11 20:28:40,673 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:28:40,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:28:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:28:40,677 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107710375] [2021-03-11 20:28:40,677 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:28:40,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 20:28:40,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803256872] [2021-03-11 20:28:40,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 20:28:40,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:28:40,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 20:28:40,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-03-11 20:28:40,679 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 89 out of 120 [2021-03-11 20:28:40,679 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 26 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 89.83333333333333) internal successors, (539), 6 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,679 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:28:40,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 89 of 120 [2021-03-11 20:28:40,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:28:40,726 INFO L129 PetriNetUnfolder]: 21/69 cut-off events. [2021-03-11 20:28:40,726 INFO L130 PetriNetUnfolder]: For 275/520 co-relation queries the response was YES. [2021-03-11 20:28:40,727 INFO L84 FinitePrefix]: Finished finitePrefix Result has 303 conditions, 69 events. 21/69 cut-off events. For 275/520 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 230 event pairs, 0 based on Foata normal form. 22/81 useless extension candidates. Maximal degree in co-relation 285. Up to 46 conditions per place. [2021-03-11 20:28:40,727 INFO L132 encePairwiseOnDemand]: 114/120 looper letters, 4 selfloop transitions, 11 changer transitions 0/27 dead transitions. [2021-03-11 20:28:40,728 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 27 transitions, 193 flow [2021-03-11 20:28:40,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 20:28:40,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 20:28:40,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 551 transitions. [2021-03-11 20:28:40,729 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7652777777777777 [2021-03-11 20:28:40,731 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 551 transitions. [2021-03-11 20:28:40,731 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 551 transitions. [2021-03-11 20:28:40,732 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:28:40,732 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 551 transitions. [2021-03-11 20:28:40,733 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 91.83333333333333) internal successors, (551), 6 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,734 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,735 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 120.0) internal successors, (840), 7 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,735 INFO L185 Difference]: Start difference. First operand has 38 places, 26 transitions, 156 flow. Second operand 6 states and 551 transitions. [2021-03-11 20:28:40,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 27 transitions, 193 flow [2021-03-11 20:28:40,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 27 transitions, 180 flow, removed 3 selfloop flow, removed 2 redundant places. [2021-03-11 20:28:40,739 INFO L241 Difference]: Finished difference. Result has 43 places, 27 transitions, 188 flow [2021-03-11 20:28:40,739 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=188, PETRI_PLACES=43, PETRI_TRANSITIONS=27} [2021-03-11 20:28:40,739 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 17 predicate places. [2021-03-11 20:28:40,739 INFO L480 AbstractCegarLoop]: Abstraction has has 43 places, 27 transitions, 188 flow [2021-03-11 20:28:40,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 89.83333333333333) internal successors, (539), 6 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,739 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:28:40,739 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:28:40,739 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 20:28:40,740 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:28:40,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:28:40,740 INFO L82 PathProgramCache]: Analyzing trace with hash -2059802250, now seen corresponding path program 1 times [2021-03-11 20:28:40,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:28:40,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282711225] [2021-03-11 20:28:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:28:40,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:28:40,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:28:40,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:28:40,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:28:40,771 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:28:40,773 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:28:40,773 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:28:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:28:40,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282711225] [2021-03-11 20:28:40,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:28:40,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:28:40,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317647654] [2021-03-11 20:28:40,776 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:28:40,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:28:40,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:28:40,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:28:40,777 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 96 out of 120 [2021-03-11 20:28:40,777 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 27 transitions, 188 flow. Second operand has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,777 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:28:40,777 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 96 of 120 [2021-03-11 20:28:40,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:28:40,792 INFO L129 PetriNetUnfolder]: 38/112 cut-off events. [2021-03-11 20:28:40,793 INFO L130 PetriNetUnfolder]: For 554/678 co-relation queries the response was YES. [2021-03-11 20:28:40,793 INFO L84 FinitePrefix]: Finished finitePrefix Result has 470 conditions, 112 events. 38/112 cut-off events. For 554/678 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 504 event pairs, 0 based on Foata normal form. 9/104 useless extension candidates. Maximal degree in co-relation 450. Up to 68 conditions per place. [2021-03-11 20:28:40,793 INFO L132 encePairwiseOnDemand]: 117/120 looper letters, 3 selfloop transitions, 1 changer transitions 6/28 dead transitions. [2021-03-11 20:28:40,794 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 28 transitions, 200 flow [2021-03-11 20:28:40,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:28:40,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:28:40,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 390 transitions. [2021-03-11 20:28:40,795 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8125 [2021-03-11 20:28:40,795 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 390 transitions. [2021-03-11 20:28:40,795 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 390 transitions. [2021-03-11 20:28:40,795 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:28:40,795 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 390 transitions. [2021-03-11 20:28:40,796 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 97.5) internal successors, (390), 4 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,796 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,796 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,796 INFO L185 Difference]: Start difference. First operand has 43 places, 27 transitions, 188 flow. Second operand 4 states and 390 transitions. [2021-03-11 20:28:40,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 28 transitions, 200 flow [2021-03-11 20:28:40,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 28 transitions, 176 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-03-11 20:28:40,799 INFO L241 Difference]: Finished difference. Result has 45 places, 22 transitions, 143 flow [2021-03-11 20:28:40,799 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=143, PETRI_PLACES=45, PETRI_TRANSITIONS=22} [2021-03-11 20:28:40,799 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 19 predicate places. [2021-03-11 20:28:40,799 INFO L480 AbstractCegarLoop]: Abstraction has has 45 places, 22 transitions, 143 flow [2021-03-11 20:28:40,799 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 97.0) internal successors, (388), 4 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,799 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 20:28:40,800 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 20:28:40,800 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 20:28:40,800 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-03-11 20:28:40,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 20:28:40,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1080054684, now seen corresponding path program 2 times [2021-03-11 20:28:40,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 20:28:40,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865650547] [2021-03-11 20:28:40,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 20:28:40,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 20:28:40,819 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:28:40,820 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 20:28:40,820 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:28:40,821 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:28:40,822 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 20:28:40,823 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 20:28:40,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 20:28:40,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865650547] [2021-03-11 20:28:40,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 20:28:40,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 20:28:40,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279523508] [2021-03-11 20:28:40,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 20:28:40,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 20:28:40,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 20:28:40,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-03-11 20:28:40,827 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 120 [2021-03-11 20:28:40,827 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 22 transitions, 143 flow. Second operand has 4 states, 4 states have (on average 96.25) internal successors, (385), 4 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,828 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 20:28:40,828 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 120 [2021-03-11 20:28:40,828 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 20:28:40,836 INFO L129 PetriNetUnfolder]: 6/29 cut-off events. [2021-03-11 20:28:40,836 INFO L130 PetriNetUnfolder]: For 76/77 co-relation queries the response was YES. [2021-03-11 20:28:40,837 INFO L84 FinitePrefix]: Finished finitePrefix Result has 110 conditions, 29 events. 6/29 cut-off events. For 76/77 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 44 event pairs, 0 based on Foata normal form. 2/30 useless extension candidates. Maximal degree in co-relation 96. Up to 9 conditions per place. [2021-03-11 20:28:40,837 INFO L132 encePairwiseOnDemand]: 117/120 looper letters, 0 selfloop transitions, 0 changer transitions 21/21 dead transitions. [2021-03-11 20:28:40,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 21 transitions, 129 flow [2021-03-11 20:28:40,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 20:28:40,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 20:28:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 385 transitions. [2021-03-11 20:28:40,838 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8020833333333334 [2021-03-11 20:28:40,838 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 385 transitions. [2021-03-11 20:28:40,838 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 385 transitions. [2021-03-11 20:28:40,838 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 20:28:40,838 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 385 transitions. [2021-03-11 20:28:40,839 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 96.25) internal successors, (385), 4 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,839 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,840 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 120.0) internal successors, (600), 5 states have internal predecessors, (600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,840 INFO L185 Difference]: Start difference. First operand has 45 places, 22 transitions, 143 flow. Second operand 4 states and 385 transitions. [2021-03-11 20:28:40,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 21 transitions, 129 flow [2021-03-11 20:28:40,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 21 transitions, 84 flow, removed 0 selfloop flow, removed 13 redundant places. [2021-03-11 20:28:40,840 INFO L241 Difference]: Finished difference. Result has 33 places, 0 transitions, 0 flow [2021-03-11 20:28:40,841 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=120, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=21, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=0, PETRI_PLACES=33, PETRI_TRANSITIONS=0} [2021-03-11 20:28:40,841 INFO L335 CegarLoopForPetriNet]: 26 programPoint places, 7 predicate places. [2021-03-11 20:28:40,841 INFO L480 AbstractCegarLoop]: Abstraction has has 33 places, 0 transitions, 0 flow [2021-03-11 20:28:40,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 96.25) internal successors, (385), 4 states have internal predecessors, (385), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 20:28:40,841 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 20:28:40,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 08:28:40 BasicIcfg [2021-03-11 20:28:40,844 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 20:28:40,844 INFO L168 Benchmark]: Toolchain (without parser) took 3711.11 ms. Allocated memory is still 373.3 MB. Free memory was 336.2 MB in the beginning and 214.6 MB in the end (delta: 121.6 MB). Peak memory consumption was 121.5 MB. Max. memory is 16.0 GB. [2021-03-11 20:28:40,845 INFO L168 Benchmark]: CDTParser took 0.10 ms. Allocated memory is still 373.3 MB. Free memory was 354.6 MB in the beginning and 354.5 MB in the end (delta: 76.8 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 20:28:40,846 INFO L168 Benchmark]: CACSL2BoogieTranslator took 363.01 ms. Allocated memory is still 373.3 MB. Free memory was 335.6 MB in the beginning and 335.0 MB in the end (delta: 528.4 kB). Peak memory consumption was 6.9 MB. Max. memory is 16.0 GB. [2021-03-11 20:28:40,847 INFO L168 Benchmark]: Boogie Procedure Inliner took 34.27 ms. Allocated memory is still 373.3 MB. Free memory was 335.0 MB in the beginning and 333.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:28:40,849 INFO L168 Benchmark]: Boogie Preprocessor took 29.08 ms. Allocated memory is still 373.3 MB. Free memory was 333.0 MB in the beginning and 331.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:28:40,850 INFO L168 Benchmark]: RCFGBuilder took 377.68 ms. Allocated memory is still 373.3 MB. Free memory was 331.9 MB in the beginning and 307.8 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. [2021-03-11 20:28:40,850 INFO L168 Benchmark]: TraceAbstraction took 2899.50 ms. Allocated memory is still 373.3 MB. Free memory was 307.8 MB in the beginning and 214.6 MB in the end (delta: 93.2 MB). Peak memory consumption was 95.3 MB. Max. memory is 16.0 GB. [2021-03-11 20:28:40,855 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10 ms. Allocated memory is still 373.3 MB. Free memory was 354.6 MB in the beginning and 354.5 MB in the end (delta: 76.8 kB). There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 363.01 ms. Allocated memory is still 373.3 MB. Free memory was 335.6 MB in the beginning and 335.0 MB in the end (delta: 528.4 kB). Peak memory consumption was 6.9 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 34.27 ms. Allocated memory is still 373.3 MB. Free memory was 335.0 MB in the beginning and 333.0 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 29.08 ms. Allocated memory is still 373.3 MB. Free memory was 333.0 MB in the beginning and 331.9 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 377.68 ms. Allocated memory is still 373.3 MB. Free memory was 331.9 MB in the beginning and 307.8 MB in the end (delta: 24.1 MB). Peak memory consumption was 23.1 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2899.50 ms. Allocated memory is still 373.3 MB. Free memory was 307.8 MB in the beginning and 214.6 MB in the end (delta: 93.2 MB). Peak memory consumption was 95.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 1860.1ms, 68 PlacesBefore, 26 PlacesAfterwards, 59 TransitionsBefore, 16 TransitionsAfterwards, 804 CoEnabledTransitionPairs, 5 FixpointIterations, 18 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 1 ConcurrentYvCompositions, 1 ChoiceCompositions, 46 TotalNumberOfCompositions, 1419 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 976, positive: 913, positive conditional: 0, positive unconditional: 913, negative: 63, negative conditional: 0, negative unconditional: 63, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 579, positive: 543, positive conditional: 0, positive unconditional: 543, negative: 36, negative conditional: 0, negative unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 579, positive: 537, positive conditional: 0, positive unconditional: 537, negative: 42, negative conditional: 0, negative unconditional: 42, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 42, positive: 6, positive conditional: 0, positive unconditional: 6, negative: 36, negative conditional: 0, negative unconditional: 36, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 162, positive: 20, positive conditional: 0, positive unconditional: 20, negative: 142, negative conditional: 0, negative unconditional: 142, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 976, positive: 370, positive conditional: 0, positive unconditional: 370, negative: 27, negative conditional: 0, negative unconditional: 27, unknown: 579, unknown conditional: 0, unknown unconditional: 579] , Statistics on independence cache: Total cache size (in pairs): 57, Positive cache size: 47, Positive conditional cache size: 0, Positive unconditional cache size: 47, Negative cache size: 10, Negative conditional cache size: 0, Negative unconditional cache size: 10 - PositiveResult [Line: 18]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 73 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.7ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2800.3ms, OverallIterations: 7, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 277.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 1937.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 24 SDtfs, 13 SDslu, 15 SDs, 0 SdLazy, 71 SolverSat, 35 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 49.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 61.6ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=188occurred in iteration=5, InterpolantAutomatonStates: 30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 17.4ms SsaConstructionTime, 181.4ms SatisfiabilityAnalysisTime, 236.0ms InterpolantComputationTime, 83 NumberOfCodeBlocks, 83 NumberOfCodeBlocksAsserted, 7 NumberOfCheckSat, 76 ConstructedInterpolants, 0 QuantifiedInterpolants, 284 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 7 InterpolantComputations, 7 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...