/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf -i ../../../trunk/examples/svcomp/pthread-nondet/nondet-loop-bound-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 19:16:16,776 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 19:16:16,779 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 19:16:16,802 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 19:16:16,802 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 19:16:16,803 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 19:16:16,804 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 19:16:16,806 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 19:16:16,808 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 19:16:16,808 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 19:16:16,809 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 19:16:16,810 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 19:16:16,811 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 19:16:16,812 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 19:16:16,813 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 19:16:16,814 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 19:16:16,815 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 19:16:16,815 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 19:16:16,817 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 19:16:16,819 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 19:16:16,820 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 19:16:16,821 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 19:16:16,822 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 19:16:16,823 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 19:16:16,825 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-10-09 19:16:16,832 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 19:16:16,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 19:16:16,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 19:16:16,835 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/VMCAI2021_PN.epf [2020-10-09 19:16:16,857 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 19:16:16,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 19:16:16,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 19:16:16,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 19:16:16,858 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 19:16:16,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 19:16:16,859 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 19:16:16,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 19:16:16,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 19:16:16,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 19:16:16,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 19:16:16,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 19:16:16,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 19:16:16,860 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 19:16:16,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 19:16:16,860 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 19:16:16,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 19:16:16,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 19:16:16,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 19:16:16,861 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 19:16:16,861 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 19:16:16,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 19:16:16,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 19:16:16,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 19:16:16,862 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 19:16:16,862 INFO L138 SettingsManager]: * Trace refinement strategy=WALRUS [2020-10-09 19:16:16,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 19:16:16,863 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2020-10-09 19:16:16,863 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2020-10-09 19:16:16,863 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 19:16:17,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 19:16:17,156 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 19:16:17,159 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 19:16:17,161 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 19:16:17,161 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 19:16:17,162 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-nondet/nondet-loop-bound-1.i [2020-10-09 19:16:17,213 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45a86502c/84ee313ce2a04507b0cb3b5efb54e2ce/FLAG3817330f4 [2020-10-09 19:16:17,730 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 19:16:17,731 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-nondet/nondet-loop-bound-1.i [2020-10-09 19:16:17,745 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45a86502c/84ee313ce2a04507b0cb3b5efb54e2ce/FLAG3817330f4 [2020-10-09 19:16:18,067 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/45a86502c/84ee313ce2a04507b0cb3b5efb54e2ce [2020-10-09 19:16:18,075 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 19:16:18,077 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 19:16:18,078 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 19:16:18,079 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 19:16:18,082 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 19:16:18,083 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 07:16:18" (1/1) ... [2020-10-09 19:16:18,086 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@de01462 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:16:18, skipping insertion in model container [2020-10-09 19:16:18,086 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 07:16:18" (1/1) ... [2020-10-09 19:16:18,094 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 19:16:18,146 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 19:16:18,547 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 19:16:18,566 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 19:16:18,641 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 19:16:18,722 INFO L208 MainTranslator]: Completed translation [2020-10-09 19:16:18,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:16:18 WrapperNode [2020-10-09 19:16:18,723 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 19:16:18,723 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 19:16:18,724 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 19:16:18,724 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 19:16:18,732 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:16:18" (1/1) ... [2020-10-09 19:16:18,748 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:16:18" (1/1) ... [2020-10-09 19:16:18,771 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 19:16:18,772 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 19:16:18,772 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 19:16:18,772 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 19:16:18,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:16:18" (1/1) ... [2020-10-09 19:16:18,781 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:16:18" (1/1) ... [2020-10-09 19:16:18,784 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:16:18" (1/1) ... [2020-10-09 19:16:18,784 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:16:18" (1/1) ... [2020-10-09 19:16:18,789 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:16:18" (1/1) ... [2020-10-09 19:16:18,794 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:16:18" (1/1) ... [2020-10-09 19:16:18,796 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:16:18" (1/1) ... [2020-10-09 19:16:18,798 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 19:16:18,799 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 19:16:18,799 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 19:16:18,799 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 19:16:18,800 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:16:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 19:16:18,867 INFO L130 BoogieDeclarations]: Found specification of procedure thr2 [2020-10-09 19:16:18,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thr2 [2020-10-09 19:16:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure thr1 [2020-10-09 19:16:18,868 INFO L138 BoogieDeclarations]: Found implementation of procedure thr1 [2020-10-09 19:16:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 19:16:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 19:16:18,868 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 19:16:18,869 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 19:16:18,869 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 19:16:18,870 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 19:16:19,157 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 19:16:19,158 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-09 19:16:19,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 07:16:19 BoogieIcfgContainer [2020-10-09 19:16:19,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 19:16:19,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 19:16:19,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 19:16:19,165 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 19:16:19,165 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 07:16:18" (1/3) ... [2020-10-09 19:16:19,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398cf067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 07:16:19, skipping insertion in model container [2020-10-09 19:16:19,166 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 07:16:18" (2/3) ... [2020-10-09 19:16:19,166 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@398cf067 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 07:16:19, skipping insertion in model container [2020-10-09 19:16:19,167 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 07:16:19" (3/3) ... [2020-10-09 19:16:19,168 INFO L111 eAbstractionObserver]: Analyzing ICFG nondet-loop-bound-1.i [2020-10-09 19:16:19,182 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 19:16:19,191 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 19:16:19,192 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 19:16:19,221 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,222 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,222 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,222 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,223 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,223 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,223 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,224 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,224 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,225 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,225 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,225 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,226 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,226 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,226 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,226 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,227 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,231 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,231 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,231 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,232 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,232 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,237 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,237 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,237 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,238 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,238 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,238 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of1ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:19,256 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2020-10-09 19:16:19,280 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 19:16:19,280 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 19:16:19,280 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 19:16:19,280 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 19:16:19,280 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 19:16:19,281 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 19:16:19,281 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 19:16:19,281 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 19:16:19,294 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 61 places, 58 transitions, 126 flow [2020-10-09 19:16:19,342 INFO L129 PetriNetUnfolder]: 4/68 cut-off events. [2020-10-09 19:16:19,343 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 19:16:19,348 INFO L80 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 68 events. 4/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 48. Up to 4 conditions per place. [2020-10-09 19:16:19,349 INFO L82 GeneralOperation]: Start removeDead. Operand has 61 places, 58 transitions, 126 flow [2020-10-09 19:16:19,355 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 60 places, 57 transitions, 122 flow [2020-10-09 19:16:19,372 INFO L129 PetriNetUnfolder]: 3/40 cut-off events. [2020-10-09 19:16:19,372 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 19:16:19,372 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:16:19,373 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:16:19,374 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 19:16:19,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:16:19,380 INFO L82 PathProgramCache]: Analyzing trace with hash -2138170809, now seen corresponding path program 1 times [2020-10-09 19:16:19,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:16:19,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [725402350] [2020-10-09 19:16:19,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 2 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with mathsat -unsat_core_generation=3 [2020-10-09 19:16:19,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:16:19,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:16:19,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:16:19,659 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:16:19,660 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:19,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:19,704 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 19:16:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:19,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:16:19,771 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:16:19,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:19,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [725402350] [2020-10-09 19:16:19,842 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:16:19,842 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2020-10-09 19:16:19,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956487263] [2020-10-09 19:16:19,854 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 19:16:19,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:16:19,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 19:16:19,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-09 19:16:20,769 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 58 [2020-10-09 19:16:20,772 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 57 transitions, 122 flow. Second operand 12 states. [2020-10-09 19:16:20,772 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:16:20,772 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 58 [2020-10-09 19:16:20,774 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:16:21,036 INFO L129 PetriNetUnfolder]: 2/77 cut-off events. [2020-10-09 19:16:21,036 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2020-10-09 19:16:21,037 INFO L80 FinitePrefix]: Finished finitePrefix Result has 109 conditions, 77 events. 2/77 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 150 event pairs, 0 based on Foata normal form. 19/92 useless extension candidates. Maximal degree in co-relation 70. Up to 6 conditions per place. [2020-10-09 19:16:21,041 INFO L132 encePairwiseOnDemand]: 47/58 looper letters, 11 selfloop transitions, 10 changer transitions 1/61 dead transitions. [2020-10-09 19:16:21,041 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 174 flow [2020-10-09 19:16:21,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 19:16:21,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 19:16:21,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 432 transitions. [2020-10-09 19:16:21,073 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7448275862068966 [2020-10-09 19:16:21,074 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 432 transitions. [2020-10-09 19:16:21,074 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 432 transitions. [2020-10-09 19:16:21,081 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:16:21,084 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 432 transitions. [2020-10-09 19:16:21,090 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 19:16:21,102 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 19:16:21,102 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 19:16:21,104 INFO L185 Difference]: Start difference. First operand has 60 places, 57 transitions, 122 flow. Second operand 10 states and 432 transitions. [2020-10-09 19:16:21,105 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 174 flow [2020-10-09 19:16:21,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 61 transitions, 173 flow, removed 0 selfloop flow, removed 1 redundant places. [2020-10-09 19:16:21,114 INFO L241 Difference]: Finished difference. Result has 71 places, 58 transitions, 158 flow [2020-10-09 19:16:21,117 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=115, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=158, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2020-10-09 19:16:21,118 INFO L341 CegarLoopForPetriNet]: 60 programPoint places, 11 predicate places. [2020-10-09 19:16:21,118 INFO L481 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 158 flow [2020-10-09 19:16:21,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 19:16:21,119 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:16:21,119 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:16:21,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 mathsat -unsat_core_generation=3 [2020-10-09 19:16:21,327 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 19:16:21,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:16:21,328 INFO L82 PathProgramCache]: Analyzing trace with hash 797898845, now seen corresponding path program 1 times [2020-10-09 19:16:21,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:16:21,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [691521391] [2020-10-09 19:16:21,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 3 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with mathsat -unsat_core_generation=3 [2020-10-09 19:16:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:16:21,398 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:16:21,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:16:21,415 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:16:21,465 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 19:16:21,466 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 19:16:21,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 mathsat -unsat_core_generation=3 [2020-10-09 19:16:21,675 WARN L371 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 19:16:21,676 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2020-10-09 19:16:21,685 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,685 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,685 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,686 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,686 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,686 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,686 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,686 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,686 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,687 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,687 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,687 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,687 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,687 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,688 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,688 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,688 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,688 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,688 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,689 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,689 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,689 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,689 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,689 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,690 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,690 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,690 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,690 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,690 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,691 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,691 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,691 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,691 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,691 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,692 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,692 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,692 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,692 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,693 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,694 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,694 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,694 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of2ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,694 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,695 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of2ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,697 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,697 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,697 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,698 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,698 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,698 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,700 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,700 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,700 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,700 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,701 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of2ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,701 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of2ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:21,705 INFO L253 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2020-10-09 19:16:21,705 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 19:16:21,705 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 19:16:21,705 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 19:16:21,706 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 19:16:21,706 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 19:16:21,706 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 19:16:21,706 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 19:16:21,706 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 19:16:21,713 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 80 places, 74 transitions, 172 flow [2020-10-09 19:16:21,745 INFO L129 PetriNetUnfolder]: 5/89 cut-off events. [2020-10-09 19:16:21,745 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2020-10-09 19:16:21,746 INFO L80 FinitePrefix]: Finished finitePrefix Result has 103 conditions, 89 events. 5/89 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 120 event pairs, 0 based on Foata normal form. 0/80 useless extension candidates. Maximal degree in co-relation 98. Up to 6 conditions per place. [2020-10-09 19:16:21,746 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 74 transitions, 172 flow [2020-10-09 19:16:21,748 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 63 transitions, 141 flow [2020-10-09 19:16:21,760 INFO L129 PetriNetUnfolder]: 3/43 cut-off events. [2020-10-09 19:16:21,760 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 19:16:21,760 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:16:21,761 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:16:21,761 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:16:21,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:16:21,761 INFO L82 PathProgramCache]: Analyzing trace with hash -425611658, now seen corresponding path program 1 times [2020-10-09 19:16:21,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:16:21,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [724631773] [2020-10-09 19:16:21,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 4 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with mathsat -unsat_core_generation=3 [2020-10-09 19:16:21,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:16:21,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:16:21,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:16:21,875 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:16:21,880 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:21,908 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:21,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 19:16:21,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:21,947 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:16:21,970 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:16:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:22,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [724631773] [2020-10-09 19:16:22,041 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:16:22,041 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2020-10-09 19:16:22,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071369880] [2020-10-09 19:16:22,042 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 19:16:22,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:16:22,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 19:16:22,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-09 19:16:22,910 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 54 out of 74 [2020-10-09 19:16:22,911 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 63 transitions, 141 flow. Second operand 12 states. [2020-10-09 19:16:22,911 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:16:22,911 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 54 of 74 [2020-10-09 19:16:22,911 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:16:23,167 INFO L129 PetriNetUnfolder]: 18/141 cut-off events. [2020-10-09 19:16:23,167 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2020-10-09 19:16:23,168 INFO L80 FinitePrefix]: Finished finitePrefix Result has 210 conditions, 141 events. 18/141 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 435 event pairs, 4 based on Foata normal form. 45/175 useless extension candidates. Maximal degree in co-relation 170. Up to 25 conditions per place. [2020-10-09 19:16:23,170 INFO L132 encePairwiseOnDemand]: 62/74 looper letters, 17 selfloop transitions, 13 changer transitions 1/75 dead transitions. [2020-10-09 19:16:23,170 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 75 transitions, 227 flow [2020-10-09 19:16:23,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 19:16:23,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 19:16:23,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 581 transitions. [2020-10-09 19:16:23,173 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7851351351351351 [2020-10-09 19:16:23,173 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 581 transitions. [2020-10-09 19:16:23,173 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 581 transitions. [2020-10-09 19:16:23,174 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:16:23,174 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 581 transitions. [2020-10-09 19:16:23,175 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 19:16:23,177 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 19:16:23,178 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 19:16:23,178 INFO L185 Difference]: Start difference. First operand has 68 places, 63 transitions, 141 flow. Second operand 10 states and 581 transitions. [2020-10-09 19:16:23,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 75 transitions, 227 flow [2020-10-09 19:16:23,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 75 transitions, 224 flow, removed 1 selfloop flow, removed 1 redundant places. [2020-10-09 19:16:23,182 INFO L241 Difference]: Finished difference. Result has 80 places, 68 transitions, 208 flow [2020-10-09 19:16:23,182 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=208, PETRI_PLACES=80, PETRI_TRANSITIONS=68} [2020-10-09 19:16:23,182 INFO L341 CegarLoopForPetriNet]: 68 programPoint places, 12 predicate places. [2020-10-09 19:16:23,182 INFO L481 AbstractCegarLoop]: Abstraction has has 80 places, 68 transitions, 208 flow [2020-10-09 19:16:23,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 19:16:23,183 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:16:23,183 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:16:23,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 mathsat -unsat_core_generation=3 [2020-10-09 19:16:23,399 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:16:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:16:23,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1975382881, now seen corresponding path program 1 times [2020-10-09 19:16:23,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:16:23,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [661754230] [2020-10-09 19:16:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 5 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with mathsat -unsat_core_generation=3 [2020-10-09 19:16:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:16:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 19:16:23,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:16:23,495 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:16:23,496 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:23,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:23,560 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 19:16:23,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:23,590 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:16:23,611 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:16:23,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:23,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [661754230] [2020-10-09 19:16:23,713 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:16:23,713 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2020-10-09 19:16:23,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612105935] [2020-10-09 19:16:23,714 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 19:16:23,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:16:23,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 19:16:23,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-09 19:16:25,199 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 74 [2020-10-09 19:16:25,200 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 68 transitions, 208 flow. Second operand 16 states. [2020-10-09 19:16:25,200 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:16:25,200 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 74 [2020-10-09 19:16:25,201 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:16:25,783 INFO L129 PetriNetUnfolder]: 46/263 cut-off events. [2020-10-09 19:16:25,784 INFO L130 PetriNetUnfolder]: For 204/411 co-relation queries the response was YES. [2020-10-09 19:16:25,786 INFO L80 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 263 events. 46/263 cut-off events. For 204/411 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1324 event pairs, 8 based on Foata normal form. 30/279 useless extension candidates. Maximal degree in co-relation 540. Up to 40 conditions per place. [2020-10-09 19:16:25,789 INFO L132 encePairwiseOnDemand]: 64/74 looper letters, 36 selfloop transitions, 32 changer transitions 0/109 dead transitions. [2020-10-09 19:16:25,789 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 109 transitions, 518 flow [2020-10-09 19:16:25,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 19:16:25,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-09 19:16:25,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1037 transitions. [2020-10-09 19:16:25,810 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7375533428165008 [2020-10-09 19:16:25,810 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1037 transitions. [2020-10-09 19:16:25,810 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1037 transitions. [2020-10-09 19:16:25,811 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:16:25,812 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1037 transitions. [2020-10-09 19:16:25,814 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-09 19:16:25,817 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-09 19:16:25,817 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-09 19:16:25,817 INFO L185 Difference]: Start difference. First operand has 80 places, 68 transitions, 208 flow. Second operand 19 states and 1037 transitions. [2020-10-09 19:16:25,817 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 109 transitions, 518 flow [2020-10-09 19:16:25,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 109 transitions, 512 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 19:16:25,824 INFO L241 Difference]: Finished difference. Result has 103 places, 86 transitions, 423 flow [2020-10-09 19:16:25,824 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=74, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=423, PETRI_PLACES=103, PETRI_TRANSITIONS=86} [2020-10-09 19:16:25,825 INFO L341 CegarLoopForPetriNet]: 68 programPoint places, 35 predicate places. [2020-10-09 19:16:25,825 INFO L481 AbstractCegarLoop]: Abstraction has has 103 places, 86 transitions, 423 flow [2020-10-09 19:16:25,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 19:16:25,825 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:16:25,826 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:16:26,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 mathsat -unsat_core_generation=3 [2020-10-09 19:16:26,047 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:16:26,047 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:16:26,047 INFO L82 PathProgramCache]: Analyzing trace with hash 630082039, now seen corresponding path program 1 times [2020-10-09 19:16:26,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:16:26,048 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [735133440] [2020-10-09 19:16:26,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 6 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with mathsat -unsat_core_generation=3 [2020-10-09 19:16:26,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:16:26,095 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:16:26,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:16:26,111 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:16:26,134 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 19:16:26,135 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 19:16:26,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 mathsat -unsat_core_generation=3 [2020-10-09 19:16:26,342 WARN L371 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 19:16:26,344 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2020-10-09 19:16:26,354 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,354 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,354 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,354 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,355 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,355 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,355 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,355 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,355 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,356 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,356 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,356 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,356 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,356 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,357 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,357 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,357 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,357 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,357 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,358 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,358 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,358 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,358 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,359 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,359 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,359 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,359 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,359 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,359 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,360 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,360 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,360 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,360 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,361 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,361 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,361 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,361 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,361 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,362 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,362 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,362 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,362 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,362 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,363 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,363 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,363 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,363 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,363 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,364 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,364 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,364 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,365 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,365 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,365 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,365 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,365 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,367 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,367 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,367 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,367 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,367 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,369 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,369 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of3ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,369 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,369 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,369 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of3ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,371 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,371 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,371 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,371 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,371 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,372 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,373 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,373 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,373 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,373 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,374 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,374 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,375 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,375 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,375 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,376 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,376 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of3ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,376 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of3ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:16:26,377 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2020-10-09 19:16:26,377 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 19:16:26,377 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 19:16:26,378 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 19:16:26,378 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 19:16:26,378 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 19:16:26,378 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 19:16:26,378 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 19:16:26,378 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 19:16:26,380 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 99 places, 90 transitions, 222 flow [2020-10-09 19:16:26,392 INFO L129 PetriNetUnfolder]: 6/110 cut-off events. [2020-10-09 19:16:26,392 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2020-10-09 19:16:26,393 INFO L80 FinitePrefix]: Finished finitePrefix Result has 131 conditions, 110 events. 6/110 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 163 event pairs, 0 based on Foata normal form. 0/99 useless extension candidates. Maximal degree in co-relation 124. Up to 8 conditions per place. [2020-10-09 19:16:26,393 INFO L82 GeneralOperation]: Start removeDead. Operand has 99 places, 90 transitions, 222 flow [2020-10-09 19:16:26,394 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 69 transitions, 162 flow [2020-10-09 19:16:26,399 INFO L129 PetriNetUnfolder]: 3/43 cut-off events. [2020-10-09 19:16:26,399 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 19:16:26,399 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:16:26,400 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:16:26,400 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:16:26,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:16:26,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1799452155, now seen corresponding path program 1 times [2020-10-09 19:16:26,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:16:26,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1021071721] [2020-10-09 19:16:26,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 7 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with mathsat -unsat_core_generation=3 [2020-10-09 19:16:26,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:16:26,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:16:26,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:16:26,530 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:16:26,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:26,550 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:26,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 19:16:26,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:26,575 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:16:26,595 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:16:26,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:26,649 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1021071721] [2020-10-09 19:16:26,649 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:16:26,649 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2020-10-09 19:16:26,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113417250] [2020-10-09 19:16:26,650 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 19:16:26,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:16:26,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 19:16:26,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-09 19:16:27,952 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 68 out of 90 [2020-10-09 19:16:27,953 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 69 transitions, 162 flow. Second operand 12 states. [2020-10-09 19:16:27,954 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:16:27,954 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 68 of 90 [2020-10-09 19:16:27,954 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:16:28,219 INFO L129 PetriNetUnfolder]: 70/273 cut-off events. [2020-10-09 19:16:28,219 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2020-10-09 19:16:28,221 INFO L80 FinitePrefix]: Finished finitePrefix Result has 432 conditions, 273 events. 70/273 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1204 event pairs, 24 based on Foata normal form. 91/335 useless extension candidates. Maximal degree in co-relation 391. Up to 77 conditions per place. [2020-10-09 19:16:28,223 INFO L132 encePairwiseOnDemand]: 77/90 looper letters, 20 selfloop transitions, 16 changer transitions 1/86 dead transitions. [2020-10-09 19:16:28,223 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 86 transitions, 270 flow [2020-10-09 19:16:28,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 19:16:28,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 19:16:28,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 727 transitions. [2020-10-09 19:16:28,226 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8077777777777778 [2020-10-09 19:16:28,226 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 727 transitions. [2020-10-09 19:16:28,227 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 727 transitions. [2020-10-09 19:16:28,227 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:16:28,227 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 727 transitions. [2020-10-09 19:16:28,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 19:16:28,231 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 19:16:28,231 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 19:16:28,231 INFO L185 Difference]: Start difference. First operand has 76 places, 69 transitions, 162 flow. Second operand 10 states and 727 transitions. [2020-10-09 19:16:28,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 86 transitions, 270 flow [2020-10-09 19:16:28,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 86 transitions, 263 flow, removed 3 selfloop flow, removed 1 redundant places. [2020-10-09 19:16:28,235 INFO L241 Difference]: Finished difference. Result has 88 places, 77 transitions, 247 flow [2020-10-09 19:16:28,236 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=149, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=247, PETRI_PLACES=88, PETRI_TRANSITIONS=77} [2020-10-09 19:16:28,236 INFO L341 CegarLoopForPetriNet]: 76 programPoint places, 12 predicate places. [2020-10-09 19:16:28,236 INFO L481 AbstractCegarLoop]: Abstraction has has 88 places, 77 transitions, 247 flow [2020-10-09 19:16:28,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 19:16:28,236 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:16:28,236 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:16:28,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 mathsat -unsat_core_generation=3 [2020-10-09 19:16:28,451 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:16:28,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:16:28,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1749873944, now seen corresponding path program 1 times [2020-10-09 19:16:28,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:16:28,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2041083096] [2020-10-09 19:16:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 8 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with mathsat -unsat_core_generation=3 [2020-10-09 19:16:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:16:28,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 19:16:28,524 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:16:28,567 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:16:28,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:28,601 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:28,603 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 19:16:28,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:28,630 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:16:28,649 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:16:28,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:28,729 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [2041083096] [2020-10-09 19:16:28,729 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:16:28,729 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2020-10-09 19:16:28,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899658462] [2020-10-09 19:16:28,730 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 19:16:28,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:16:28,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 19:16:28,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-09 19:16:30,911 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 65 out of 90 [2020-10-09 19:16:30,912 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 77 transitions, 247 flow. Second operand 16 states. [2020-10-09 19:16:30,912 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:16:30,912 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 65 of 90 [2020-10-09 19:16:30,913 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:16:31,673 INFO L129 PetriNetUnfolder]: 221/736 cut-off events. [2020-10-09 19:16:31,673 INFO L130 PetriNetUnfolder]: For 931/3216 co-relation queries the response was YES. [2020-10-09 19:16:31,679 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1956 conditions, 736 events. 221/736 cut-off events. For 931/3216 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 4819 event pairs, 58 based on Foata normal form. 52/726 useless extension candidates. Maximal degree in co-relation 1909. Up to 220 conditions per place. [2020-10-09 19:16:31,690 INFO L132 encePairwiseOnDemand]: 79/90 looper letters, 48 selfloop transitions, 41 changer transitions 0/135 dead transitions. [2020-10-09 19:16:31,690 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 135 transitions, 727 flow [2020-10-09 19:16:31,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 19:16:31,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-09 19:16:31,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1324 transitions. [2020-10-09 19:16:31,696 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7742690058479532 [2020-10-09 19:16:31,696 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1324 transitions. [2020-10-09 19:16:31,696 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1324 transitions. [2020-10-09 19:16:31,697 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:16:31,697 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1324 transitions. [2020-10-09 19:16:31,700 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-09 19:16:31,704 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-09 19:16:31,705 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-09 19:16:31,705 INFO L185 Difference]: Start difference. First operand has 88 places, 77 transitions, 247 flow. Second operand 19 states and 1324 transitions. [2020-10-09 19:16:31,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 135 transitions, 727 flow [2020-10-09 19:16:31,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 135 transitions, 721 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 19:16:31,716 INFO L241 Difference]: Finished difference. Result has 111 places, 102 transitions, 552 flow [2020-10-09 19:16:31,717 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=241, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=552, PETRI_PLACES=111, PETRI_TRANSITIONS=102} [2020-10-09 19:16:31,717 INFO L341 CegarLoopForPetriNet]: 76 programPoint places, 35 predicate places. [2020-10-09 19:16:31,717 INFO L481 AbstractCegarLoop]: Abstraction has has 111 places, 102 transitions, 552 flow [2020-10-09 19:16:31,717 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 19:16:31,717 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:16:31,718 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:16:31,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 mathsat -unsat_core_generation=3 [2020-10-09 19:16:31,941 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:16:31,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:16:31,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1876900355, now seen corresponding path program 1 times [2020-10-09 19:16:31,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:16:31,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [992602408] [2020-10-09 19:16:31,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 9 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with mathsat -unsat_core_generation=3 [2020-10-09 19:16:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:16:31,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 19:16:31,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:16:32,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:32,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:32,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:16:32,128 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:16:32,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:32,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [992602408] [2020-10-09 19:16:32,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [2117973226] [2020-10-09 19:16:32,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:16:32,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:16:32,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 19:16:32,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:16:32,348 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:32,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:32,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:32,375 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:16:32,414 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:32,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492491144] [2020-10-09 19:16:32,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:16:32,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:16:32,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 19:16:32,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:16:32,487 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:32,489 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:32,495 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:32,495 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:16:32,512 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:16:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:32,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:16:32,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 21 [2020-10-09 19:16:32,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241202767] [2020-10-09 19:16:32,533 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 19:16:32,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:16:32,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 19:16:32,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-09 19:16:34,971 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 90 [2020-10-09 19:16:34,972 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 102 transitions, 552 flow. Second operand 21 states. [2020-10-09 19:16:34,972 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:16:34,973 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 90 [2020-10-09 19:16:34,973 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:16:39,930 INFO L129 PetriNetUnfolder]: 11631/24609 cut-off events. [2020-10-09 19:16:39,930 INFO L130 PetriNetUnfolder]: For 83547/84916 co-relation queries the response was YES. [2020-10-09 19:16:40,064 INFO L80 FinitePrefix]: Finished finitePrefix Result has 79951 conditions, 24609 events. 11631/24609 cut-off events. For 83547/84916 co-relation queries the response was YES. Maximal size of possible extension queue 1663. Compared 259612 event pairs, 2433 based on Foata normal form. 249/23467 useless extension candidates. Maximal degree in co-relation 79895. Up to 5544 conditions per place. [2020-10-09 19:16:40,241 INFO L132 encePairwiseOnDemand]: 75/90 looper letters, 283 selfloop transitions, 405 changer transitions 32/764 dead transitions. [2020-10-09 19:16:40,242 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 764 transitions, 6607 flow [2020-10-09 19:16:40,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-09 19:16:40,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-09 19:16:40,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 4949 transitions. [2020-10-09 19:16:40,255 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7532724505327245 [2020-10-09 19:16:40,256 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 4949 transitions. [2020-10-09 19:16:40,256 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 4949 transitions. [2020-10-09 19:16:40,259 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:16:40,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 4949 transitions. [2020-10-09 19:16:40,269 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 74 states. [2020-10-09 19:16:40,280 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 74 states. [2020-10-09 19:16:40,280 INFO L81 ComplementDD]: Finished complementDD. Result 74 states. [2020-10-09 19:16:40,281 INFO L185 Difference]: Start difference. First operand has 111 places, 102 transitions, 552 flow. Second operand 73 states and 4949 transitions. [2020-10-09 19:16:40,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 764 transitions, 6607 flow [2020-10-09 19:16:41,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 764 transitions, 6213 flow, removed 78 selfloop flow, removed 7 redundant places. [2020-10-09 19:16:41,149 INFO L241 Difference]: Finished difference. Result has 219 places, 566 transitions, 5675 flow [2020-10-09 19:16:41,150 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=5675, PETRI_PLACES=219, PETRI_TRANSITIONS=566} [2020-10-09 19:16:41,150 INFO L341 CegarLoopForPetriNet]: 76 programPoint places, 143 predicate places. [2020-10-09 19:16:41,150 INFO L481 AbstractCegarLoop]: Abstraction has has 219 places, 566 transitions, 5675 flow [2020-10-09 19:16:41,151 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 19:16:41,151 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:16:41,151 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:16:41,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 mathsat -unsat_core_generation=3,10 cvc4 --incremental --print-success --lang smt --rewrite-divk,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:16:41,763 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:16:41,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:16:41,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1846290007, now seen corresponding path program 1 times [2020-10-09 19:16:41,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:16:41,766 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1449027652] [2020-10-09 19:16:41,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 12 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with mathsat -unsat_core_generation=3 [2020-10-09 19:16:42,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:16:42,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 19:16:42,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:16:42,178 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:16:42,178 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:42,243 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:42,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 19:16:42,273 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:42,273 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:16:42,292 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:16:42,437 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:42,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1449027652] [2020-10-09 19:16:42,439 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1829106023] [2020-10-09 19:16:42,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:16:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:16:42,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 19:16:42,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:16:42,576 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:16:42,577 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:42,585 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:42,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 19:16:42,619 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:42,619 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:16:42,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:42,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477769226] [2020-10-09 19:16:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:16:42,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:16:42,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 19:16:42,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:16:42,726 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:16:42,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:42,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:16:42,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 19:16:42,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:42,751 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:16:42,771 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:16:42,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:16:42,791 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:16:42,791 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 24 [2020-10-09 19:16:42,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563562614] [2020-10-09 19:16:42,792 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 19:16:42,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:16:42,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 19:16:42,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2020-10-09 19:16:46,677 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 90 [2020-10-09 19:16:46,678 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 566 transitions, 5675 flow. Second operand 24 states. [2020-10-09 19:16:46,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:16:46,679 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 90 [2020-10-09 19:16:46,679 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:16:52,794 INFO L129 PetriNetUnfolder]: 8952/23739 cut-off events. [2020-10-09 19:16:52,795 INFO L130 PetriNetUnfolder]: For 232829/239322 co-relation queries the response was YES. [2020-10-09 19:16:53,103 INFO L80 FinitePrefix]: Finished finitePrefix Result has 104322 conditions, 23739 events. 8952/23739 cut-off events. For 232829/239322 co-relation queries the response was YES. Maximal size of possible extension queue 1664. Compared 290875 event pairs, 1289 based on Foata normal form. 1169/23880 useless extension candidates. Maximal degree in co-relation 104224. Up to 4478 conditions per place. [2020-10-09 19:16:53,311 INFO L132 encePairwiseOnDemand]: 77/90 looper letters, 255 selfloop transitions, 630 changer transitions 10/1028 dead transitions. [2020-10-09 19:16:53,311 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 1028 transitions, 12541 flow [2020-10-09 19:16:53,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-09 19:16:53,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-09 19:16:53,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3959 transitions. [2020-10-09 19:16:53,318 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7331481481481481 [2020-10-09 19:16:53,318 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3959 transitions. [2020-10-09 19:16:53,318 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3959 transitions. [2020-10-09 19:16:53,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:16:53,320 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3959 transitions. [2020-10-09 19:16:53,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 61 states. [2020-10-09 19:16:53,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 61 states. [2020-10-09 19:16:53,332 INFO L81 ComplementDD]: Finished complementDD. Result 61 states. [2020-10-09 19:16:53,332 INFO L185 Difference]: Start difference. First operand has 219 places, 566 transitions, 5675 flow. Second operand 60 states and 3959 transitions. [2020-10-09 19:16:53,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 1028 transitions, 12541 flow [2020-10-09 19:16:59,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 1028 transitions, 9983 flow, removed 1279 selfloop flow, removed 0 redundant places. [2020-10-09 19:16:59,576 INFO L241 Difference]: Finished difference. Result has 305 places, 830 transitions, 8925 flow [2020-10-09 19:16:59,577 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=90, PETRI_DIFFERENCE_MINUEND_FLOW=4629, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=366, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=8925, PETRI_PLACES=305, PETRI_TRANSITIONS=830} [2020-10-09 19:16:59,577 INFO L341 CegarLoopForPetriNet]: 76 programPoint places, 229 predicate places. [2020-10-09 19:16:59,577 INFO L481 AbstractCegarLoop]: Abstraction has has 305 places, 830 transitions, 8925 flow [2020-10-09 19:16:59,577 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 19:16:59,577 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:16:59,577 INFO L255 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:17:00,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,13 cvc4 --incremental --print-success --lang smt --rewrite-divk,12 mathsat -unsat_core_generation=3 [2020-10-09 19:17:00,178 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 19:17:00,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:17:00,179 INFO L82 PathProgramCache]: Analyzing trace with hash 1733752762, now seen corresponding path program 1 times [2020-10-09 19:17:00,179 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:17:00,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [2292889] [2020-10-09 19:17:00,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 15 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with mathsat -unsat_core_generation=3 [2020-10-09 19:17:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:17:00,469 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:17:00,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-09 19:17:00,486 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-09 19:17:00,507 INFO L173 FreeRefinementEngine]: Strategy WALRUS found a feasible trace [2020-10-09 19:17:00,507 INFO L519 BasicCegarLoop]: Counterexample might be feasible [2020-10-09 19:17:00,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 mathsat -unsat_core_generation=3 [2020-10-09 19:17:00,708 WARN L371 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2020-10-09 19:17:00,709 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2020-10-09 19:17:00,721 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,722 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,722 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,722 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,722 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,722 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,722 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,723 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,723 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,723 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,723 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,723 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,723 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,724 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,724 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,724 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,724 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,724 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,724 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,725 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,725 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,725 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,725 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,725 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,725 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,725 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,725 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,725 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,726 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,726 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,726 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,726 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,726 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,726 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,726 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,726 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,726 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,727 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,727 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,727 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,727 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,727 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,727 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,727 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,728 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,728 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,728 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,728 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,728 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,728 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,728 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,728 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,728 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,729 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,729 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,729 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,729 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,729 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,729 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,729 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,730 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,730 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,730 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,730 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,730 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,730 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,731 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,731 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,731 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,731 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,731 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,732 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread1of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,732 WARN L313 ript$VariableManager]: TermVariabe thr2Thread1of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,733 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,733 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,733 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,734 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread2of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,734 WARN L313 ript$VariableManager]: TermVariabe thr2Thread2of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,735 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,735 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,735 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,735 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread3of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,735 WARN L313 ript$VariableManager]: TermVariabe thr2Thread3of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,736 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~t~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,737 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,737 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,737 WARN L313 ript$VariableManager]: TermVariabe thr2Thread4of4ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,737 WARN L313 ript$VariableManager]: TermVariabe |thr2Thread4of4ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,738 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,738 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,738 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,739 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,739 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread1of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,739 WARN L313 ript$VariableManager]: TermVariabe thr1Thread1of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,740 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,740 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,740 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,741 WARN L313 ript$VariableManager]: TermVariabe thr1Thread2of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,741 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,741 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread2of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,742 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,742 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,742 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,742 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread3of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,743 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,743 WARN L313 ript$VariableManager]: TermVariabe thr1Thread3of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,744 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1___VERIFIER_assert_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,744 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,744 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,744 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,744 WARN L313 ript$VariableManager]: TermVariabe thr1Thread4of4ForFork1___VERIFIER_assert_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,745 WARN L313 ript$VariableManager]: TermVariabe |thr1Thread4of4ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 19:17:00,746 INFO L253 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2020-10-09 19:17:00,746 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 19:17:00,746 INFO L378 AbstractCegarLoop]: Hoare is false [2020-10-09 19:17:00,746 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 19:17:00,746 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 19:17:00,746 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 19:17:00,746 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 19:17:00,747 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 19:17:00,747 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 19:17:00,748 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 118 places, 106 transitions, 276 flow [2020-10-09 19:17:00,757 INFO L129 PetriNetUnfolder]: 7/131 cut-off events. [2020-10-09 19:17:00,757 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2020-10-09 19:17:00,758 INFO L80 FinitePrefix]: Finished finitePrefix Result has 160 conditions, 131 events. 7/131 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 201 event pairs, 0 based on Foata normal form. 0/118 useless extension candidates. Maximal degree in co-relation 151. Up to 10 conditions per place. [2020-10-09 19:17:00,758 INFO L82 GeneralOperation]: Start removeDead. Operand has 118 places, 106 transitions, 276 flow [2020-10-09 19:17:00,759 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 84 places, 75 transitions, 185 flow [2020-10-09 19:17:00,762 INFO L129 PetriNetUnfolder]: 3/42 cut-off events. [2020-10-09 19:17:00,762 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 19:17:00,762 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:17:00,762 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:17:00,762 INFO L429 AbstractCegarLoop]: === Iteration 1 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 19:17:00,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:17:00,763 INFO L82 PathProgramCache]: Analyzing trace with hash -1964725004, now seen corresponding path program 1 times [2020-10-09 19:17:00,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:17:00,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [640953436] [2020-10-09 19:17:00,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 16 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with mathsat -unsat_core_generation=3 [2020-10-09 19:17:00,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:17:00,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 19:17:00,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:17:00,878 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:17:00,879 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:00,891 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:00,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 19:17:00,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:00,917 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:17:00,928 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:17:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:00,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [640953436] [2020-10-09 19:17:00,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:17:00,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8, 8] imperfect sequences [] total 12 [2020-10-09 19:17:00,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368115293] [2020-10-09 19:17:00,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 19:17:00,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:17:00,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 19:17:00,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-09 19:17:02,529 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 82 out of 106 [2020-10-09 19:17:02,530 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 185 flow. Second operand 12 states. [2020-10-09 19:17:02,530 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:17:02,530 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 82 of 106 [2020-10-09 19:17:02,530 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:17:02,847 INFO L129 PetriNetUnfolder]: 210/557 cut-off events. [2020-10-09 19:17:02,847 INFO L130 PetriNetUnfolder]: For 17/17 co-relation queries the response was YES. [2020-10-09 19:17:02,850 INFO L80 FinitePrefix]: Finished finitePrefix Result has 927 conditions, 557 events. 210/557 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 2994 event pairs, 92 based on Foata normal form. 177/668 useless extension candidates. Maximal degree in co-relation 885. Up to 205 conditions per place. [2020-10-09 19:17:02,855 INFO L132 encePairwiseOnDemand]: 92/106 looper letters, 23 selfloop transitions, 19 changer transitions 1/97 dead transitions. [2020-10-09 19:17:02,855 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 97 transitions, 315 flow [2020-10-09 19:17:02,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 19:17:02,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2020-10-09 19:17:02,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 873 transitions. [2020-10-09 19:17:02,858 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.8235849056603773 [2020-10-09 19:17:02,858 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 873 transitions. [2020-10-09 19:17:02,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 873 transitions. [2020-10-09 19:17:02,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:17:02,859 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 873 transitions. [2020-10-09 19:17:02,860 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 11 states. [2020-10-09 19:17:02,861 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 11 states. [2020-10-09 19:17:02,861 INFO L81 ComplementDD]: Finished complementDD. Result 11 states. [2020-10-09 19:17:02,862 INFO L185 Difference]: Start difference. First operand has 84 places, 75 transitions, 185 flow. Second operand 10 states and 873 transitions. [2020-10-09 19:17:02,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 97 transitions, 315 flow [2020-10-09 19:17:02,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 97 transitions, 302 flow, removed 6 selfloop flow, removed 1 redundant places. [2020-10-09 19:17:02,864 INFO L241 Difference]: Finished difference. Result has 96 places, 86 transitions, 286 flow [2020-10-09 19:17:02,865 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=166, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=286, PETRI_PLACES=96, PETRI_TRANSITIONS=86} [2020-10-09 19:17:02,865 INFO L341 CegarLoopForPetriNet]: 84 programPoint places, 12 predicate places. [2020-10-09 19:17:02,865 INFO L481 AbstractCegarLoop]: Abstraction has has 96 places, 86 transitions, 286 flow [2020-10-09 19:17:02,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 19:17:02,865 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:17:02,865 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:17:03,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 mathsat -unsat_core_generation=3 [2020-10-09 19:17:03,077 INFO L429 AbstractCegarLoop]: === Iteration 2 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 19:17:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:17:03,077 INFO L82 PathProgramCache]: Analyzing trace with hash -2049373695, now seen corresponding path program 1 times [2020-10-09 19:17:03,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:17:03,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1645147299] [2020-10-09 19:17:03,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 17 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with mathsat -unsat_core_generation=3 [2020-10-09 19:17:03,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:17:03,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 19:17:03,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:17:03,186 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:17:03,187 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:03,223 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:03,226 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 19:17:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:03,248 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:17:03,265 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:17:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:03,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1645147299] [2020-10-09 19:17:03,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 2 perfect and 0 imperfect interpolant sequences. [2020-10-09 19:17:03,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10, 10] imperfect sequences [] total 16 [2020-10-09 19:17:03,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665412230] [2020-10-09 19:17:03,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 19:17:03,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:17:03,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 19:17:03,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-09 19:17:06,085 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 79 out of 106 [2020-10-09 19:17:06,086 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 86 transitions, 286 flow. Second operand 16 states. [2020-10-09 19:17:06,086 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:17:06,087 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 79 of 106 [2020-10-09 19:17:06,087 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:17:06,808 INFO L129 PetriNetUnfolder]: 738/1686 cut-off events. [2020-10-09 19:17:06,808 INFO L130 PetriNetUnfolder]: For 2633/23499 co-relation queries the response was YES. [2020-10-09 19:17:06,819 INFO L80 FinitePrefix]: Finished finitePrefix Result has 5355 conditions, 1686 events. 738/1686 cut-off events. For 2633/23499 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 11988 event pairs, 235 based on Foata normal form. 129/1653 useless extension candidates. Maximal degree in co-relation 5307. Up to 756 conditions per place. [2020-10-09 19:17:06,837 INFO L132 encePairwiseOnDemand]: 94/106 looper letters, 54 selfloop transitions, 50 changer transitions 0/155 dead transitions. [2020-10-09 19:17:06,837 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 155 transitions, 876 flow [2020-10-09 19:17:06,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 19:17:06,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-09 19:17:06,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1605 transitions. [2020-10-09 19:17:06,840 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7969215491559086 [2020-10-09 19:17:06,840 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1605 transitions. [2020-10-09 19:17:06,840 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1605 transitions. [2020-10-09 19:17:06,841 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:17:06,841 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1605 transitions. [2020-10-09 19:17:06,843 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 20 states. [2020-10-09 19:17:06,845 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 20 states. [2020-10-09 19:17:06,845 INFO L81 ComplementDD]: Finished complementDD. Result 20 states. [2020-10-09 19:17:06,845 INFO L185 Difference]: Start difference. First operand has 96 places, 86 transitions, 286 flow. Second operand 19 states and 1605 transitions. [2020-10-09 19:17:06,845 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 155 transitions, 876 flow [2020-10-09 19:17:06,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 155 transitions, 870 flow, removed 0 selfloop flow, removed 3 redundant places. [2020-10-09 19:17:06,852 INFO L241 Difference]: Finished difference. Result has 119 places, 117 transitions, 667 flow [2020-10-09 19:17:06,852 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=667, PETRI_PLACES=119, PETRI_TRANSITIONS=117} [2020-10-09 19:17:06,852 INFO L341 CegarLoopForPetriNet]: 84 programPoint places, 35 predicate places. [2020-10-09 19:17:06,852 INFO L481 AbstractCegarLoop]: Abstraction has has 119 places, 117 transitions, 667 flow [2020-10-09 19:17:06,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 19:17:06,853 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:17:06,853 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:17:07,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 mathsat -unsat_core_generation=3 [2020-10-09 19:17:07,072 INFO L429 AbstractCegarLoop]: === Iteration 3 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 19:17:07,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:17:07,073 INFO L82 PathProgramCache]: Analyzing trace with hash 2141394546, now seen corresponding path program 1 times [2020-10-09 19:17:07,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:17:07,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1726250429] [2020-10-09 19:17:07,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 18 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with mathsat -unsat_core_generation=3 [2020-10-09 19:17:07,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:17:07,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 19:17:07,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:17:07,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:07,196 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:07,214 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:07,214 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:17:07,234 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:17:07,315 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:07,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1726250429] [2020-10-09 19:17:07,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1616057209] [2020-10-09 19:17:07,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:17:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:17:07,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 19:17:07,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:17:07,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:07,455 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:07,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:07,484 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:17:07,522 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:07,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919255343] [2020-10-09 19:17:07,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:17:07,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:17:07,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 19:17:07,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:17:07,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:07,593 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:07,598 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:07,598 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:17:07,614 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:17:07,634 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:07,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:17:07,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11, 11, 11, 11] total 21 [2020-10-09 19:17:07,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528176010] [2020-10-09 19:17:07,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-09 19:17:07,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:17:07,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-09 19:17:07,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2020-10-09 19:17:11,557 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 106 [2020-10-09 19:17:11,559 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 117 transitions, 667 flow. Second operand 21 states. [2020-10-09 19:17:11,559 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:17:11,559 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 106 [2020-10-09 19:17:11,559 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:17:23,858 INFO L129 PetriNetUnfolder]: 39335/75592 cut-off events. [2020-10-09 19:17:23,858 INFO L130 PetriNetUnfolder]: For 291879/304563 co-relation queries the response was YES. [2020-10-09 19:17:24,306 INFO L80 FinitePrefix]: Finished finitePrefix Result has 278224 conditions, 75592 events. 39335/75592 cut-off events. For 291879/304563 co-relation queries the response was YES. Maximal size of possible extension queue 4065. Compared 832539 event pairs, 9664 based on Foata normal form. 526/72075 useless extension candidates. Maximal degree in co-relation 278167. Up to 22992 conditions per place. [2020-10-09 19:17:24,637 INFO L132 encePairwiseOnDemand]: 90/106 looper letters, 309 selfloop transitions, 481 changer transitions 32/871 dead transitions. [2020-10-09 19:17:24,637 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 871 transitions, 7954 flow [2020-10-09 19:17:24,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-09 19:17:24,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-09 19:17:24,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 6023 transitions. [2020-10-09 19:17:24,644 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7783665029723442 [2020-10-09 19:17:24,645 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 6023 transitions. [2020-10-09 19:17:24,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 6023 transitions. [2020-10-09 19:17:24,647 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:17:24,647 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 6023 transitions. [2020-10-09 19:17:24,653 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 74 states. [2020-10-09 19:17:24,661 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 74 states. [2020-10-09 19:17:24,661 INFO L81 ComplementDD]: Finished complementDD. Result 74 states. [2020-10-09 19:17:24,661 INFO L185 Difference]: Start difference. First operand has 119 places, 117 transitions, 667 flow. Second operand 73 states and 6023 transitions. [2020-10-09 19:17:24,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 871 transitions, 7954 flow [2020-10-09 19:17:30,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 871 transitions, 7416 flow, removed 124 selfloop flow, removed 7 redundant places. [2020-10-09 19:17:30,298 INFO L241 Difference]: Finished difference. Result has 227 places, 658 transitions, 6824 flow [2020-10-09 19:17:30,299 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=577, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=73, PETRI_FLOW=6824, PETRI_PLACES=227, PETRI_TRANSITIONS=658} [2020-10-09 19:17:30,299 INFO L341 CegarLoopForPetriNet]: 84 programPoint places, 143 predicate places. [2020-10-09 19:17:30,299 INFO L481 AbstractCegarLoop]: Abstraction has has 227 places, 658 transitions, 6824 flow [2020-10-09 19:17:30,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-09 19:17:30,299 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:17:30,299 INFO L255 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:17:30,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 mathsat -unsat_core_generation=3,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,19 cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:17:30,911 INFO L429 AbstractCegarLoop]: === Iteration 4 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 19:17:30,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:17:30,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1522513484, now seen corresponding path program 1 times [2020-10-09 19:17:30,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:17:30,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [1283603367] [2020-10-09 19:17:30,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 21 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with mathsat -unsat_core_generation=3 [2020-10-09 19:17:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:17:30,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 19:17:30,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:17:31,013 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:17:31,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:31,076 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:31,078 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 19:17:31,111 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:31,112 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:17:31,131 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:17:31,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:31,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [1283603367] [2020-10-09 19:17:31,806 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1700689763] [2020-10-09 19:17:31,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:17:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:17:31,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-09 19:17:31,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:17:31,939 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:17:31,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:31,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:31,944 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 19:17:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:31,980 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:17:32,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:32,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397069016] [2020-10-09 19:17:32,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:17:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:17:32,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 19:17:32,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:17:32,085 INFO L375 QuantifierPusher]: Applying distributivity to a CONJUNCTION[2, 2, 3, 2, 1] term [2020-10-09 19:17:32,085 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:32,090 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:17:32,096 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 19:17:32,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:32,104 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:17:32,124 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:17:32,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:17:32,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:17:32,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12, 12, 12, 12] total 24 [2020-10-09 19:17:32,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268287373] [2020-10-09 19:17:32,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-09 19:17:32,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:17:32,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-09 19:17:32,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2020-10-09 19:17:37,412 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 106 [2020-10-09 19:17:37,413 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 658 transitions, 6824 flow. Second operand 24 states. [2020-10-09 19:17:37,414 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:17:37,414 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 106 [2020-10-09 19:17:37,414 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:17:58,932 INFO L129 PetriNetUnfolder]: 33091/75149 cut-off events. [2020-10-09 19:17:58,932 INFO L130 PetriNetUnfolder]: For 765248/802081 co-relation queries the response was YES. [2020-10-09 19:18:00,047 INFO L80 FinitePrefix]: Finished finitePrefix Result has 364060 conditions, 75149 events. 33091/75149 cut-off events. For 765248/802081 co-relation queries the response was YES. Maximal size of possible extension queue 4378. Compared 960908 event pairs, 5841 based on Foata normal form. 2752/74324 useless extension candidates. Maximal degree in co-relation 363961. Up to 20420 conditions per place. [2020-10-09 19:18:00,477 INFO L132 encePairwiseOnDemand]: 92/106 looper letters, 339 selfloop transitions, 838 changer transitions 16/1331 dead transitions. [2020-10-09 19:18:00,477 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 1331 transitions, 17776 flow [2020-10-09 19:18:00,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-09 19:18:00,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-09 19:18:00,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 4881 transitions. [2020-10-09 19:18:00,482 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7674528301886793 [2020-10-09 19:18:00,482 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 4881 transitions. [2020-10-09 19:18:00,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 4881 transitions. [2020-10-09 19:18:00,483 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:18:00,483 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 4881 transitions. [2020-10-09 19:18:00,486 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 61 states. [2020-10-09 19:18:00,491 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 61 states. [2020-10-09 19:18:00,491 INFO L81 ComplementDD]: Finished complementDD. Result 61 states. [2020-10-09 19:18:00,491 INFO L185 Difference]: Start difference. First operand has 227 places, 658 transitions, 6824 flow. Second operand 60 states and 4881 transitions. [2020-10-09 19:18:00,491 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 1331 transitions, 17776 flow [2020-10-09 19:18:47,603 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 1331 transitions, 13400 flow, removed 2188 selfloop flow, removed 0 redundant places. [2020-10-09 19:18:47,618 INFO L241 Difference]: Finished difference. Result has 315 places, 1059 transitions, 11528 flow [2020-10-09 19:18:47,619 INFO L325 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=5440, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=658, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=437, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=11528, PETRI_PLACES=315, PETRI_TRANSITIONS=1059} [2020-10-09 19:18:47,619 INFO L341 CegarLoopForPetriNet]: 84 programPoint places, 231 predicate places. [2020-10-09 19:18:47,619 INFO L481 AbstractCegarLoop]: Abstraction has has 315 places, 1059 transitions, 11528 flow [2020-10-09 19:18:47,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-09 19:18:47,619 INFO L247 CegarLoopForPetriNet]: Found error trace [2020-10-09 19:18:47,619 INFO L255 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 19:18:48,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 mathsat -unsat_core_generation=3,22 cvc4 --incremental --print-success --lang smt --rewrite-divk,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:18:48,221 INFO L429 AbstractCegarLoop]: === Iteration 5 === [thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, thr1Err0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION]=== [2020-10-09 19:18:48,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 19:18:48,221 INFO L82 PathProgramCache]: Analyzing trace with hash 924537122, now seen corresponding path program 1 times [2020-10-09 19:18:48,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy WALRUS [2020-10-09 19:18:48,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleMathsat [63183818] [2020-10-09 19:18:48,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/mathsat Starting monitored process 24 with mathsat -unsat_core_generation=3 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with mathsat -unsat_core_generation=3 [2020-10-09 19:18:48,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:18:48,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 19:18:48,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:18:48,368 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:18:48,372 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:18:48,398 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:18:48,398 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:18:48,415 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:18:48,549 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:18:48,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleMathsat [63183818] [2020-10-09 19:18:48,550 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleCvc4 [1037318404] [2020-10-09 19:18:48,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/cvc4 Starting monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with cvc4 --incremental --print-success --lang smt --rewrite-divk [2020-10-09 19:18:48,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:18:48,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-09 19:18:48,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:18:48,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:18:48,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:18:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:18:48,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:18:48,762 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:18:48,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544638029] [2020-10-09 19:18:48,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 19:18:48,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 19:18:48,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-09 19:18:48,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 19:18:48,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:18:48,835 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 19:18:48,843 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:18:48,843 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2020-10-09 19:18:48,863 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-09 19:18:48,873 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 19:18:48,874 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 6 imperfect interpolant sequences. [2020-10-09 19:18:48,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13, 13, 13, 13] total 26 [2020-10-09 19:18:48,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485686687] [2020-10-09 19:18:48,875 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-09 19:18:48,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy WALRUS [2020-10-09 19:18:48,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-09 19:18:48,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2020-10-09 19:18:54,268 INFO L506 CegarLoopForPetriNet]: Number of universal loopers: 75 out of 106 [2020-10-09 19:18:54,270 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 1059 transitions, 11528 flow. Second operand 26 states. [2020-10-09 19:18:54,270 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2020-10-09 19:18:54,270 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 75 of 106 [2020-10-09 19:18:54,270 INFO L71 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2020-10-09 19:20:29,288 INFO L129 PetriNetUnfolder]: 110708/212191 cut-off events. [2020-10-09 19:20:29,288 INFO L130 PetriNetUnfolder]: For 3416317/3439593 co-relation queries the response was YES. [2020-10-09 19:20:34,454 INFO L80 FinitePrefix]: Finished finitePrefix Result has 1238843 conditions, 212191 events. 110708/212191 cut-off events. For 3416317/3439593 co-relation queries the response was YES. Maximal size of possible extension queue 12933. Compared 2652907 event pairs, 27416 based on Foata normal form. 2820/210716 useless extension candidates. Maximal degree in co-relation 1238712. Up to 52196 conditions per place. [2020-10-09 19:20:35,667 INFO L132 encePairwiseOnDemand]: 90/106 looper letters, 1894 selfloop transitions, 1226 changer transitions 74/3284 dead transitions. [2020-10-09 19:20:35,668 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 3284 transitions, 45000 flow [2020-10-09 19:20:35,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2020-10-09 19:20:35,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-09 19:20:35,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 5987 transitions. [2020-10-09 19:20:35,675 INFO L551 CegarLoopForPetriNet]: DFA transition density 0.7737141380201602 [2020-10-09 19:20:35,675 INFO L72 ComplementDD]: Start complementDD. Operand 73 states and 5987 transitions. [2020-10-09 19:20:35,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 73 states and 5987 transitions. [2020-10-09 19:20:35,677 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2020-10-09 19:20:35,678 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 73 states and 5987 transitions. [2020-10-09 19:20:35,684 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 74 states. [2020-10-09 19:20:35,691 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result 74 states. [2020-10-09 19:20:35,692 INFO L81 ComplementDD]: Finished complementDD. Result 74 states. [2020-10-09 19:20:35,692 INFO L185 Difference]: Start difference. First operand has 315 places, 1059 transitions, 11528 flow. Second operand 73 states and 5987 transitions. [2020-10-09 19:20:35,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 3284 transitions, 45000 flow Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown